Dependency resolution improvements

make dependencies

Makefile

@@ -7,12 +7,13 @@ SYSCONFDIR := $(PREFIX)/etc
 GO ?= go
 
 # Build-time variables
+VERSION ?= $(shell git describe --tags --dirty)
 ROOT_COMPILATION_UID ?= 65534
 ROOT_COMPILATION_GID ?= 65534
 
 build:
 	mkdir -p build
-	cd src/bpm; $(GO) build -ldflags "-w -X 'git.enumerated.dev/bubble-package-manager/bpm/src/bpmlib.rootCompilationUID=$(ROOT_COMPILATION_UID)' -X 'git.enumerated.dev/bubble-package-manager/bpm/src/bpmlib.rootCompilationGID=$(ROOT_COMPILATION_GID)'" -o ../../build/bpm git.enumerated.dev/bubble-package-manager/bpm/src/bpm
+	cd src/bpm; $(GO) build $(GOFLAGS) -ldflags "-w -X 'main.BpmVersion=$(VERSION)' -X 'github.com/EnumeratedDev/bpm/src/bpmlib.rootCompilationUID=$(ROOT_COMPILATION_UID)' -X 'github.com/EnumeratedDev/bpm/src/bpmlib.rootCompilationGID=$(ROOT_COMPILATION_GID)'" -o ../../build/bpm bpm
 
 install: build/bpm config/
 	# Create directory

config/bpm.conf

@@ -1,4 +1,5 @@
 ignore_packages: []
+show_source_package_contents: always
 cleanup_make_dependencies: true
 databases:
   - name: example-database

src/bpm/go.mod

@@ -1,14 +1,23 @@
-module git.enumerated.dev/bubble-package-manager/bpm/src/bpm
+module bpm
 
-go 1.23
-
-toolchain go1.23.7
-
-require git.enumerated.dev/bubble-package-manager/bpm/src/bpmlib v0.5.0
-
-replace git.enumerated.dev/bubble-package-manager/bpm/src/bpmlib => ../bpmlib
+go 1.24.0
 
 require (
+	github.com/EnumeratedDev/bpm/src/bpmlib v0.0.0
+	github.com/lithammer/fuzzysearch v1.1.8
+	github.com/spf13/pflag v1.0.10
+)
+
+replace github.com/EnumeratedDev/bpm/src/bpmlib => ../bpmlib
+
+require (
+	github.com/drone/envsubst v1.0.3 // indirect
 	github.com/knqyf263/go-rpm-version v0.0.0-20240918084003-2afd7dc6a38f // indirect
+	github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db // indirect
+	github.com/rivo/uniseg v0.4.7 // indirect
+	github.com/schollz/progressbar/v3 v3.18.0 // indirect
+	golang.org/x/sys v0.37.0 // indirect
+	golang.org/x/term v0.36.0 // indirect
+	golang.org/x/text v0.9.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

src/bpm/go.sum

@@ -1,5 +1,65 @@
+github.com/chengxilo/virtualterm v1.0.4 h1:Z6IpERbRVlfB8WkOmtbHiDbBANU7cimRIof7mk9/PwM=
+github.com/chengxilo/virtualterm v1.0.4/go.mod h1:DyxxBZz/x1iqJjFxTFcr6/x+jSpqN0iwWCOK1q10rlY=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/drone/envsubst v1.0.3 h1:PCIBwNDYjs50AsLZPYdfhSATKaRg/FJmDc2D6+C2x8g=
+github.com/drone/envsubst v1.0.3/go.mod h1:N2jZmlMufstn1KEqvbHjw40h1KyTmnVzHcSc9bFiJ2g=
+github.com/google/go-cmp v0.2.0 h1:+dTQ8DZQJz0Mb/HjFlkptS1FeQ4cWSnN941F8aEG4SQ=
+github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/knqyf263/go-rpm-version v0.0.0-20240918084003-2afd7dc6a38f h1:xt29M2T6STgldg+WEP51gGePQCsQvklmP2eIhPIBK3g=
 github.com/knqyf263/go-rpm-version v0.0.0-20240918084003-2afd7dc6a38f/go.mod h1:i4sF0l1fFnY1aiw08QQSwVAFxHEm311Me3WsU/X7nL0=
+github.com/lithammer/fuzzysearch v1.1.8 h1:/HIuJnjHuXS8bKaiTMeeDlW2/AyIWk2brx1V8LFgLN4=
+github.com/lithammer/fuzzysearch v1.1.8/go.mod h1:IdqeyBClc3FFqSzYq/MXESsS4S0FsZ5ajtkr5xPLts4=
+github.com/mattn/go-runewidth v0.0.16 h1:E5ScNMtiwvlvB5paMFdw9p4kSQzbXFikJ5SQO6TULQc=
+github.com/mattn/go-runewidth v0.0.16/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
+github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db h1:62I3jR2EmQ4l5rM/4FEfDWcRD+abF5XlKShorW5LRoQ=
+github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db/go.mod h1:l0dey0ia/Uv7NcFFVbCLtqEBQbrT4OCwCSKTEv6enCw=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
+github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
+github.com/schollz/progressbar/v3 v3.18.0 h1:uXdoHABRFmNIjUfte/Ex7WtuyVslrw2wVPQmCN62HpA=
+github.com/schollz/progressbar/v3 v3.18.0/go.mod h1:IsO3lpbaGuzh8zIMzgY3+J8l4C8GjO0Y9S69eFvNsec=
+github.com/spf13/pflag v1.0.10 h1:4EBh2KAYBwaONj6b2Ye1GiHfwjqyROoF4RwYO+vPwFk=
+github.com/spf13/pflag v1.0.10/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
+golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
+golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.37.0 h1:fdNQudmxPjkdUTPnLn5mdQv7Zwvbvpaxqs831goi9kQ=
+golang.org/x/sys v0.37.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
+golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
+golang.org/x/term v0.36.0 h1:zMPR+aF8gfksFprF/Nc/rd1wRS1EI6nDBGyWAvDzx2Q=
+golang.org/x/term v0.36.0/go.mod h1:Qu394IJq6V6dCBRgwqshf3mPF85AqzYEzofzRdZkWss=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.9.0 h1:2sjJmO8cDvYveuX97RDLsxlyUxLl+GHoLxBiRdHllBE=
+golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

src/bpmlib/compilation.go

@@ -1,22 +1,35 @@
 package bpmlib
 
 import (
+	"crypto/sha256"
+	"encoding/hex"
 	"errors"
 	"fmt"
+	"io"
+	"io/fs"
 	"os"
 	"os/exec"
 	"path"
+	"path/filepath"
+	"runtime"
+	"slices"
 	"strconv"
 	"strings"
 	"syscall"
 
+	"github.com/drone/envsubst"
 	"gopkg.in/yaml.v3"
 )
 
 var rootCompilationUID = "65534"
 var rootCompilationGID = "65534"
 
-func CompileSourcePackage(archiveFilename, outputDirectory string, skipChecks bool) (outputBpmPackages map[string]string, err error) {
+func CompileSourcePackage(archiveFilename, outputDirectory string, compilationJobs int, skipChecks, keepCompilationFiles, verbose bool) (outputBpmPackages map[string]string, err error) {
+	// Set compilation jobs
+	if compilationJobs <= 0 || compilationJobs > runtime.NumCPU() {
+		compilationJobs = runtime.NumCPU()
+	}
+
 	// Initialize map
 	outputBpmPackages = make(map[string]string)
 
@@ -31,12 +44,6 @@ func CompileSourcePackage(archiveFilename, outputDirectory string, skipChecks bo
 		return nil, errors.New("cannot compile a non-source package")
 	}
 
-	// Read compilation options file in current directory
-	compilationOptions, err := readCompilationOptionsFile()
-	if err != nil {
-		return nil, err
-	}
-
 	// Get HOME directory
 	homeDir, err := os.UserHomeDir()
 	if err != nil {
@@ -122,30 +129,50 @@ func CompileSourcePackage(archiveFilename, outputDirectory string, skipChecks bo
 		return nil, err
 	}
 
+	// Download files
+	err = downloadPackageFiles(bpmpkg.PkgInfo, tempDirectory, verbose)
+	if err != nil {
+		return nil, err
+	}
+
 	// Setup environment for commands
 	env := os.Environ()
 	env = append(env, "HOME="+tempDirectory)
 	env = append(env, "BPM_WORKDIR="+tempDirectory)
 	env = append(env, "BPM_SOURCE="+path.Join(tempDirectory, "source"))
-	env = append(env, "BPM_OUTPUT="+path.Join(tempDirectory, "output"))
 	env = append(env, "BPM_PKG_NAME="+bpmpkg.PkgInfo.Name)
 	env = append(env, "BPM_PKG_VERSION="+bpmpkg.PkgInfo.Version)
 	env = append(env, "BPM_PKG_REVISION="+strconv.Itoa(bpmpkg.PkgInfo.Revision))
-	// Check for architecture override in compilation options
-	if val, ok := compilationOptions["ARCH"]; ok {
-		env = append(env, "BPM_PKG_ARCH="+val)
-	} else {
-		env = append(env, "BPM_PKG_ARCH="+GetArch())
-	}
+	env = append(env, "BPM_PKG_URL="+bpmpkg.PkgInfo.Url)
+	env = append(env, "BPM_PKG_ARCH="+bpmpkg.PkgInfo.OutputArch)
+	env = append(env, "BPM_JOBS="+strconv.Itoa(compilationJobs))
 	env = append(env, CompilationBPMConfig.CompilationEnvironment...)
 
+	// Set common flags used for limiting job count
+	makeflags := ""
+	env = slices.DeleteFunc(env, func(s string) bool {
+		if strings.HasPrefix(s, "MAKEFLAGS=") {
+			makeflags = s + " "
+			return true
+		} else if strings.HasPrefix(s, "CMAKE_BUILD_PARALLEL_LEVEL=") {
+			return true
+		} else if strings.HasPrefix(s, "CARGO_BUILD_JOBS=") {
+			return true
+		}
+
+		return false
+	})
+	env = append(env, makeflags+"-j"+strconv.Itoa(compilationJobs))
+	env = append(env, "CMAKE_BUILD_PARALLEL_LEVEL="+strconv.Itoa(compilationJobs))
+	env = append(env, "CARGO_BUILD_JOBS="+strconv.Itoa(compilationJobs))
+
 	// Execute prepare and build functions in source.sh script
 	cmd := exec.Command("bash", "-c",
 		"set -a\n"+ // Source and export functions and variables in source.sh script
 			". \"${BPM_WORKDIR}\"/source.sh\n"+
 			"set +a\n"+
-			"[[ $(type -t prepare) == \"function\" ]] && { echo \"Running prepare() function\"; bash -e -c 'cd \"$BPM_WORKDIR\" && prepare' || exit 1; }\n"+ // Run prepare() function if it exists
-			"[[ $(type -t build) == \"function\" ]] && { echo \"Running build() function\"; bash -e -c 'cd \"$BPM_SOURCE\" && build'  || exit 1; }\n"+ // Run build() function if it exists
+			"[[ $(type -t prepare) == \"function\" ]] && { echo \"Running prepare() function...\"; bash -e -c 'cd \"$BPM_WORKDIR\" && prepare' || exit 1; }\n"+ // Run prepare() function if it exists
+			"[[ $(type -t build) == \"function\" ]] && { echo \"Running build() function...\"; bash -e -c 'cd \"$BPM_SOURCE\" && build'  || exit 1; }\n"+ // Run build() function if it exists
 			"exit 0")
 	cmd.Dir = tempDirectory
 	cmd.Stdout = os.Stdout
@@ -166,7 +193,7 @@ func CompileSourcePackage(archiveFilename, outputDirectory string, skipChecks bo
 			"set -a\n"+ // Source and export functions and variables in source.sh script
 				". \"${BPM_WORKDIR}\"/source.sh\n"+
 				"set +a\n"+
-				"[[ $(type -t check) == \"function\" ]] && { echo \"Running check() function\"; bash -e -c 'cd \"$BPM_SOURCE\" && check' || exit 1; }\n"+ // Run check() function if it exists
+				"[[ $(type -t check) == \"function\" ]] && { echo \"Running check() function...\"; bash -e -c 'cd \"$BPM_SOURCE\" && check' || exit 1; }\n"+ // Run check() function if it exists
 				"exit 0")
 		cmd.Dir = tempDirectory
 		cmd.Stdout = os.Stdout
@@ -188,6 +215,21 @@ func CompileSourcePackage(archiveFilename, outputDirectory string, skipChecks bo
 		packagesToCompile = append(packagesToCompile, bpmpkg.PkgInfo)
 	}
 
+	// Create output directories for each package
+	for _, pkg := range packagesToCompile {
+		// Create new output directory
+		err = os.Mkdir(path.Join(tempDirectory, "output_"+pkg.Name), 0755)
+		if err != nil {
+			return nil, err
+		}
+
+		// Change output directory owner
+		err = os.Chown(path.Join(tempDirectory, "output_"+pkg.Name), uid, gid)
+		if err != nil {
+			return nil, err
+		}
+	}
+
 	// Compile each package
 	for _, pkg := range packagesToCompile {
 		// Get package function name
@@ -196,38 +238,102 @@ func CompileSourcePackage(archiveFilename, outputDirectory string, skipChecks bo
 			packageFunctionName = "package_" + pkg.Name
 		}
 
-		// Remove output directory if it already exists
-		if _, err := os.Stat(path.Join(tempDirectory, "output")); err == nil {
-			err := os.RemoveAll(path.Join(tempDirectory, "output"))
-			if err != nil {
-				return nil, err
-			}
-		}
-
-		// Create new output directory
-		err = os.Mkdir(path.Join(tempDirectory, "output"), 0755)
-		if err != nil {
-			return nil, err
-		}
-
-		// Change output directory owner
-		err = os.Chown(path.Join(tempDirectory, "output"), uid, gid)
-		if err != nil {
-			return nil, err
-		}
-
 		// Execute package function in source.sh script and generate package file list
 		cmd = exec.Command("bash", "-c",
 			"set -a\n"+ // Source and export functions and variables in source.sh script
 				". \"${BPM_WORKDIR}\"/source.sh\n"+
 				"set +a\n"+
-				"echo \"Running "+packageFunctionName+"() function\"\n"+
-				"( cd \"$BPM_SOURCE\" && fakeroot -s \"$BPM_WORKDIR\"/fakeroot_file bash -e -c '"+packageFunctionName+"' ) || exit 1\n"+ // Run package() function
-				"fakeroot -i \"$BPM_WORKDIR\"/fakeroot_file find \"$BPM_OUTPUT\" -mindepth 1 -printf \"%P %#m %U %G %s\\n\" > \"$BPM_WORKDIR\"/pkg.files") // Create package file list
+				"echo \"Running "+packageFunctionName+"() function...\"\n"+
+				"( cd \"$BPM_SOURCE\" && fakeroot -s \"$BPM_WORKDIR\"/fakeroot_file bash -e -c '"+packageFunctionName+"' ) || exit 1\n") // Run package() function
+
 		cmd.Dir = tempDirectory
 		cmd.Stdout = os.Stdout
 		cmd.Stderr = os.Stderr
-		cmd.Env = env
+		cmd.Env = append(env, "BPM_OUTPUT="+path.Join(tempDirectory, "output_"+pkg.Name))
+		if os.Getuid() == 0 {
+			cmd.SysProcAttr = &syscall.SysProcAttr{}
+			cmd.SysProcAttr.Credential = &syscall.Credential{Uid: uint32(uid), Gid: uint32(gid)}
+		}
+		err = cmd.Run()
+		if err != nil {
+			return nil, err
+		}
+
+		// Strip all ELF binaries
+		if !slices.Contains(pkg.Options, "nostrip") {
+			if _, err := exec.LookPath("strip"); err != nil {
+				fmt.Println("Skip stripping ELF binaries. 'strip' not in path")
+			} else {
+				fmt.Println("Stripping ELF binaries...")
+
+				err = filepath.WalkDir(path.Join(tempDirectory, "output_"+pkg.Name), func(path string, d fs.DirEntry, err error) error {
+					cmd = exec.Command("file", "-bi", path)
+					cmd.Stderr = os.Stderr
+					output, err := cmd.Output()
+					if err != nil {
+						return err
+					}
+
+					mimetype := strings.Split(string(output), ";")[0]
+
+					if strings.HasPrefix(mimetype, "application/x-executable") {
+						cmd := exec.Command("strip", path)
+						cmd.Stderr = os.Stderr
+						err = cmd.Run()
+						if err != nil {
+							return err
+						}
+						if verbose {
+							fmt.Printf("Stripped %s (%s)\n", path, mimetype)
+						}
+					} else if strings.HasPrefix(mimetype, "application/x-pie-executable") || strings.HasPrefix(mimetype, "application/x-sharedlib") {
+						cmd = exec.Command("file", "-b", path)
+						cmd.Stderr = os.Stderr
+						output, err = cmd.Output()
+						if err != nil {
+							return err
+						}
+						// Skip files that use ELF as a container format
+						if strings.Contains(string(output), "no machine") {
+							return nil
+						}
+
+						cmd := exec.Command("strip", "--strip-unneeded", path)
+						cmd.Stderr = os.Stderr
+						err = cmd.Run()
+						if err != nil {
+							return err
+						}
+						if verbose {
+							fmt.Printf("Stripped %s (%s)\n", path, mimetype)
+						}
+					} else if strings.HasPrefix(mimetype, "application/x-archive") {
+						cmd := exec.Command("strip", "--strip-debug", path)
+						cmd.Stderr = os.Stderr
+						err = cmd.Run()
+						if err != nil {
+							return err
+						}
+						if verbose {
+							fmt.Printf("Stripped %s (%s)\n", path, mimetype)
+						}
+					}
+
+					return nil
+				})
+				if err != nil {
+					return nil, err
+				}
+			}
+		}
+
+		// Generate package file list
+		fmt.Println("Generating package file list...")
+		cmd = exec.Command("bash", "-c", "fakeroot -i \"$BPM_WORKDIR\"/fakeroot_file find \"$BPM_OUTPUT\" -mindepth 1 -printf \"%P %#m %U %G %s\\n\" > \"$BPM_WORKDIR\"/pkg.files")
+		cmd.Dir = tempDirectory
+		cmd.Stdout = os.Stdout
+		cmd.Stderr = os.Stderr
+		cmd.Env = append(env, "BPM_OUTPUT="+path.Join(tempDirectory, "output_"+pkg.Name))
 		if os.Getuid() == 0 {
 			cmd.SysProcAttr = &syscall.SysProcAttr{}
 			cmd.SysProcAttr.Credential = &syscall.Credential{Uid: uint32(uid), Gid: uint32(gid)}
@@ -238,7 +344,8 @@ func CompileSourcePackage(archiveFilename, outputDirectory string, skipChecks bo
 		}
 
 		// Create gzip-compressed archive for the package files
-		cmd = exec.Command("bash", "-c", "find output -printf \"%P\\n\" | fakeroot -i \"$BPM_WORKDIR\"/fakeroot_file tar -czf files.tar.gz --no-recursion -C output -T -")
+		fmt.Println("Generating compressed file archive...")
+		cmd = exec.Command("bash", "-c", fmt.Sprintf("find %s -printf \"%%P\\n\" | fakeroot -i %s/fakeroot_file tar -czf files.tar.gz --no-recursion -C %s -T -", "output_"+pkg.Name, tempDirectory, "output_"+pkg.Name))
 		cmd.Dir = tempDirectory
 		cmd.Stdout = os.Stdout
 		cmd.Stderr = os.Stderr
@@ -259,14 +366,12 @@ func CompileSourcePackage(archiveFilename, outputDirectory string, skipChecks bo
 		pkgInfo.Type = "binary"
 
 		// Set package architecture
-		if val, ok := compilationOptions["ARCH"]; ok {
-			pkgInfo.Arch = val
-		} else {
-			pkgInfo.Arch = GetArch()
-		}
+		pkgInfo.Arch = pkg.OutputArch
+		pkgInfo.OutputArch = ""
 
-		// Remove split package field
+		// Remove split package and downloads fields
 		pkgInfo.SplitPackages = nil
+		pkgInfo.Downloads = nil
 
 		// Marshal package info
 		pkgInfoBytes, err := yaml.Marshal(pkgInfo)
@@ -293,6 +398,7 @@ func CompileSourcePackage(archiveFilename, outputDirectory string, skipChecks bo
 		bpmArchiveFiles = append(bpmArchiveFiles, packageScripts...)                       // Package scripts
 
 		// Create final BPM archive
+		fmt.Println("Generating final BPM archive...")
 		cmd = exec.Command("bash", "-c", "tar -cf final-archive.bpm --owner=0 --group=0 -C \"$BPM_WORKDIR\" "+strings.Join(bpmArchiveFiles, " "))
 		cmd.Dir = tempDirectory
 		cmd.Stdout = os.Stdout
@@ -332,52 +438,321 @@ func CompileSourcePackage(archiveFilename, outputDirectory string, skipChecks bo
 			return nil, err
 		}
 
+		// Remove output directory
+		err = os.RemoveAll(path.Join(tempDirectory, "output_"+pkg.Name))
+		if err != nil {
+			return nil, err
+		}
+
 		outputBpmPackages[pkgInfo.Name] = outputFilename
 	}
 
+	// Delete temporary directory
+	if !keepCompilationFiles {
+		os.RemoveAll(tempDirectory)
+	}
+
 	return outputBpmPackages, nil
 }
 
-func readCompilationOptionsFile() (options map[string]string, err error) {
-	// Initialize options map
-	options = make(map[string]string)
+func downloadPackageFiles(pkgInfo *PackageInfo, tempDirectory string, verbose bool) error {
+	// Get UID and GID to use for compilation
+	var uid, gid int
+	if os.Getuid() == 0 {
+		_uid, err := strconv.ParseInt(rootCompilationUID, 10, 32)
+		if err != nil {
+			return fmt.Errorf("could not convert UID '%s' to int", rootCompilationUID)
+		}
+		_gid, err := strconv.ParseInt(rootCompilationGID, 10, 32)
+		if err != nil {
+			return fmt.Errorf("could not convert GID '%s' to int", rootCompilationGID)
+		}
+		uid = int(_uid)
+		gid = int(_gid)
+	} else {
+		uid = os.Getuid()
+		gid = os.Getgid()
+	}
 
-	// Check if file compilation options file exists
-	stat, err := os.Stat(".compilation-options")
+	for _, download := range pkgInfo.Downloads {
+		// Replace variables
+		replaceVars := func(s string) string {
+			switch s {
+			case "BPM_PKG_NAME":
+				return pkgInfo.Name
+			case "BPM_PKG_VERSION":
+				return pkgInfo.Version
+			case "BPM_PKG_URL":
+				return pkgInfo.Url
+			case "BPM_SOURCE":
+				return path.Join(tempDirectory, "source/")
+			default:
+				return ""
+			}
+		}
+
+		downloadUrl, err := envsubst.Eval(strings.TrimSpace(download.Url), replaceVars)
+		if err != nil {
+			return err
+		}
+		filepath, err := envsubst.Eval(strings.TrimSpace(download.Filepath), replaceVars)
+		if err != nil {
+			return err
+		}
+		extractTo, err := envsubst.Eval(strings.TrimSpace(download.ExtractTo), replaceVars)
+		if err != nil {
+			return err
+		}
+		cloneTo, err := envsubst.Eval(strings.TrimSpace(download.CloneTo), replaceVars)
+		if err != nil {
+			return err
+		}
+
+		// Make relative paths absolute
+		if extractTo != "" && extractTo[0] != '/' {
+			extractTo = path.Join(tempDirectory, extractTo)
+		}
+		// Make relative paths absolute
+		if cloneTo != "" && cloneTo[0] != '/' {
+			cloneTo = path.Join(tempDirectory, cloneTo)
+		}
+
+		switch download.Type {
+		case "", "file":
+			if filepath == "" {
+				filepath = path.Join(tempDirectory, path.Base(downloadUrl))
+			}
+			if filepath[0] != '/' {
+				filepath = path.Join(tempDirectory, filepath)
+			}
+
+			err := downloadFile("Downloading file "+path.Base(filepath), downloadUrl, filepath, 0644)
+			if err != nil {
+				return err
+			}
+
+			if download.Checksum != "skip" {
+				f, err := os.Open(filepath)
+				if err != nil {
+					return err
+				}
+				defer f.Close()
+
+				h := sha256.New()
+				_, err = io.Copy(h, f)
+				if err != nil {
+					return err
+				}
+
+				if hex.EncodeToString(h.Sum(nil)) != download.Checksum {
+					fmt.Printf("Downloaded file checksum: %x\n", h.Sum(nil))
+					return fmt.Errorf("downloaded file checksums did not match")
+				}
+			} else {
+				fmt.Println("Skipping checksum checking...")
+			}
+
+			// Change downloaded file ownership
+			err = os.Chown(filepath, uid, gid)
+			if err != nil {
+				return err
+			}
+
+			if !download.NoExtract && (strings.Contains(filepath, ".tar") || strings.HasSuffix(filepath, ".tgz")) {
+				cmd := exec.Command("tar", "xf", filepath, "--strip-components="+strconv.Itoa(download.ExtractStripComponents))
+				if verbose {
+					cmd.Args[1] = "xvf"
+				}
+				cmd.Dir = tempDirectory
+				if os.Getuid() == 0 {
+					cmd.SysProcAttr = &syscall.SysProcAttr{}
+					cmd.SysProcAttr.Credential = &syscall.Credential{Uid: uint32(uid), Gid: uint32(gid)}
+				}
+				if extractTo != "" {
+					err := os.MkdirAll(extractTo, 0755)
+					if err != nil {
+						return err
+					}
+					cmd.Args = append(cmd.Args, "-C", extractTo)
+				}
+
+				cmd.Stdout = os.Stdout
+				cmd.Stderr = os.Stderr
+
+				err := cmd.Run()
+				if err != nil {
+					return err
+				}
+			} else if !download.NoExtract && strings.HasSuffix(filepath, ".zip") {
+				cmd := exec.Command("unzip", filepath)
+				cmd.Dir = tempDirectory
+				if os.Getuid() == 0 {
+					cmd.SysProcAttr = &syscall.SysProcAttr{}
+					cmd.SysProcAttr.Credential = &syscall.Credential{Uid: uint32(uid), Gid: uint32(gid)}
+				}
+				if extractTo != "" {
+					err := os.MkdirAll(extractTo, 0755)
+					if err != nil {
+						return err
+					}
+					cmd.Args = append(cmd.Args, "-d", extractTo)
+				} else {
+					err := os.Mkdir(path.Join(tempDirectory, strings.TrimSuffix(path.Base(filepath), ".zip")), 0755)
+					if err != nil {
+						return err
+					}
+
+					cmd.Args = append(cmd.Args, "-d", path.Join(tempDirectory, strings.TrimSuffix(path.Base(filepath), ".zip")))
+				}
+
+				cmd.Stdout = os.Stdout
+				cmd.Stderr = os.Stderr
+
+				err := cmd.Run()
+				if err != nil {
+					return err
+				}
+			}
+		case "git":
+			// Replace variables in git branch
+			gitBranch := download.GitBranch
+			gitBranch, err := envsubst.Eval(gitBranch, func(s string) string {
+				switch s {
+				case "BPM_PKG_NAME":
+					return pkgInfo.Name
+				case "BPM_PKG_VERSION":
+					return pkgInfo.Version
+				case "BPM_PKG_URL":
+					return pkgInfo.Url
+				default:
+					return ""
+				}
+			})
+			if err != nil {
+				return err
+			}
+
+			cmd := exec.Command("git", "clone", "--depth=1", downloadUrl)
+			cmd.Dir = tempDirectory
+			if os.Getuid() == 0 {
+				cmd.SysProcAttr = &syscall.SysProcAttr{}
+				cmd.SysProcAttr.Credential = &syscall.Credential{Uid: uint32(uid), Gid: uint32(gid)}
+			}
+			if gitBranch != "" {
+				cmd.Args = slices.Insert(cmd.Args, len(cmd.Args)-1, "--branch="+gitBranch)
+			}
+			if cloneTo != "" {
+				err := os.MkdirAll(cloneTo, 0755)
+				if err != nil {
+					return err
+				}
+				cmd.Args = append(cmd.Args, cloneTo)
+			}
+
+			cmd.Stdout = os.Stdout
+			cmd.Stderr = os.Stderr
+
+			err = cmd.Run()
+			if err != nil {
+				return err
+			}
+
+			if download.Checksum != "skip" {
+				cmd := exec.Command("git", "rev-parse", "HEAD")
+				if cloneTo != "" {
+					cmd.Dir = cloneTo
+				} else {
+					cmd.Dir = path.Join(tempDirectory, strings.TrimSuffix(path.Base(downloadUrl), ".git"))
+				}
+
+				branchChecksum, err := cmd.Output()
+				if err != nil {
+					return err
+				}
+
+				if strings.TrimSpace(string(branchChecksum)) != download.Checksum {
+					fmt.Printf("Git branch checksum: %s\n", strings.TrimSpace(string(branchChecksum)))
+					return fmt.Errorf("Cloned git repository checksum did not match")
+				}
+			} else {
+				fmt.Println("Skipping checksum checking...")
+			}
+		default:
+			return fmt.Errorf("unknown download type (%s)", download.Type)
+		}
+	}
+
+	return nil
+}
+
+func showPackageFiles(archiveFilename string) error {
+	// Read BPM archive
+	bpmpkg, err := ReadPackage(archiveFilename)
 	if err != nil {
-		return nil, nil
+		return err
 	}
 
-	// Ensure it is a regular file
-	if !stat.Mode().IsRegular() {
-		return nil, fmt.Errorf("%s is not a regular file", stat.Name())
+	// Ensure package type is 'source'
+	if bpmpkg.PkgInfo.Type != "source" {
+		return fmt.Errorf("cannot compile a non-source package")
 	}
 
-	// Read file data
-	data, err := os.ReadFile(stat.Name())
+	printTarballContent := func(filename string) error {
+		// Get tarball reader for file
+		reader, err := readTarballFile(archiveFilename, filename)
+		if err != nil {
+			return err
+		}
+
+		// Read file content
+		data, err := io.ReadAll(reader.tarReader)
+		if err != nil {
+			return err
+		}
+
+		// Print file name and content
+		fmt.Println("==============================")
+		fmt.Printf("%s: %s\n", bpmpkg.PkgInfo.Name, filename)
+		fmt.Println("==============================")
+		fmt.Printf("%s\n", data)
+
+		// Close reader
+		err = reader.file.Close()
+		if err != nil {
+			return err
+		}
+
+		return nil
+	}
+
+	// Print pkg.info content
+	err = printTarballContent("pkg.info")
 	if err != nil {
-		return nil, err
+		return err
 	}
 
-	for _, line := range strings.Split(string(data), "\n") {
-		// Trim line
-		line = strings.TrimSpace(line)
-
-		// Skip empty lines
-		if line == "" {
+	// Print source files contents
+	files, err := listTarballContent(archiveFilename)
+	if err != nil {
+		return err
+	}
+	for _, file := range files {
+		if !strings.HasPrefix(file, "source-files/") {
 			continue
 		}
 
-		// Split line
-		split := strings.SplitN(line, "=", 2)
-
-		// Throw error if line isn't valid
-		if len(split) < 2 {
-			return nil, fmt.Errorf("invalid line in compilation-options file: '%s'", line)
+		// Print source file content
+		err = printTarballContent(file)
+		if err != nil {
+			return err
 		}
-
-		options[split[0]] = split[1]
 	}
 
-	return options, nil
+	// Print source.sh content
+	err = printTarballContent("source.sh")
+	if err != nil {
+		return err
+	}
+
+	return nil
 }

src/bpmlib/config.go

@@ -7,13 +7,23 @@ import (
 )
 
 type MainBPMConfigStruct struct {
-	IgnorePackages          []string       `yaml:"ignore_packages"`
-	CleanupMakeDependencies bool           `yaml:"cleanup_make_dependencies"`
-	Databases               []*BPMDatabase `yaml:"databases"`
+	IgnorePackages            []string         `yaml:"ignore_packages"`
+	IgnorePaths               []string         `yaml:"ignore_paths"`
+	ShowSourcePackageContents string           `yaml:"show_source_package_contents"`
+	CleanupMakeDependencies   bool             `yaml:"cleanup_make_dependencies"`
+	Databases                 []configDatabase `yaml:"databases"`
+}
+
+type configDatabase struct {
+	Name              string `yaml:"name"`
+	Source            string `yaml:"source"`
+	VerificationLevel string `yaml:"verification_level"`
+	Disabled          *bool  `yaml:"disabled"`
 }
 
 type CompilationBPMConfigStruct struct {
 	PrivilegeEscalatorCmd  string   `yaml:"privilege_escalator_cmd"`
+	CompilationJobs        int      `yaml:"compilation_jobs"`
 	CompilationEnvironment []string `yaml:"compilation_env"`
 }
 
@@ -25,7 +35,8 @@ func ReadConfig() (err error) {
 
 	// Set default config options
 	MainBPMConfig = MainBPMConfigStruct{
-		CleanupMakeDependencies: true,
+		ShowSourcePackageContents: "always",
+		CleanupMakeDependencies:   true,
 	}
 
 	// Read main BPM config

src/bpmlib/databases.go

@@ -1,40 +1,55 @@
 package bpmlib
 
 import (
+	"bytes"
 	"errors"
 	"fmt"
 	"io"
+	"maps"
 	"net/http"
 	"net/url"
 	"os"
 	"path"
+	"slices"
+	"strconv"
 	"strings"
 
 	"gopkg.in/yaml.v3"
 )
 
+type VerificationLevel int
+
+const (
+	VerificationLevelNone VerificationLevel = iota
+	VerificationLevelAll
+	VerificationLevelTrusted
+)
+
 type BPMDatabase struct {
-	Name            string `yaml:"name"`
-	Source          string `yaml:"source"`
-	Disabled        *bool  `yaml:"disabled"`
-	Entries         map[string]*BPMDatabaseEntry
-	VirtualPackages map[string][]string
+	DatabaseVersion   int                          `yaml:"database_version"`
+	Entries           map[string]*BPMDatabaseEntry `yaml:"entries"`
+	VirtualPackages   map[string][]*BPMDatabaseEntry
+	Name              string
+	VerificationLevel VerificationLevel
+	Source            string
 }
 
 type BPMDatabaseEntry struct {
 	Info          *PackageInfo `yaml:"info"`
-	Download      string       `yaml:"download"`
-	DownloadSize  uint64       `yaml:"download_size"`
-	InstalledSize uint64       `yaml:"installed_size"`
+	Filepath      string       `yaml:"filepath"`
+	DownloadSize  int64        `yaml:"download_size"`
+	InstalledSize int64        `yaml:"installed_size"`
 	Database      *BPMDatabase
 }
 
+var BPMDatabases = make(map[string]*BPMDatabase)
+
 func (db *BPMDatabase) ContainsPackage(pkg string) bool {
 	_, ok := db.Entries[pkg]
 	return ok
 }
 
-func (db *BPMDatabase) ReadLocalDatabase() error {
+func (db *configDatabase) ReadLocalDatabase() error {
 	dbFile := "/var/lib/bpm/databases/" + db.Name + ".bpmdb"
 	if _, err := os.Stat(dbFile); err != nil {
 		return nil
@@ -45,37 +60,35 @@ func (db *BPMDatabase) ReadLocalDatabase() error {
 		return err
 	}
 
-	data := string(bytes)
-	for _, b := range strings.Split(data, "---") {
-		entry := BPMDatabaseEntry{
-			Info: &PackageInfo{
-				Name:            "",
-				Description:     "",
-				Version:         "",
-				Revision:        1,
-				Url:             "",
-				License:         "",
-				Arch:            "",
-				Type:            "",
-				Keep:            make([]string, 0),
-				Depends:         make([]string, 0),
-				MakeDepends:     make([]string, 0),
-				OptionalDepends: make([]string, 0),
-				Conflicts:       make([]string, 0),
-				Provides:        make([]string, 0),
-			},
-			Download:      "",
-			DownloadSize:  0,
-			InstalledSize: 0,
-			Database:      db,
-		}
-		err := yaml.Unmarshal([]byte(b), &entry)
-		if err != nil {
-			return err
-		}
+	// Unmarshal yaml
+	database := &BPMDatabase{}
+	err = yaml.Unmarshal(bytes, database)
+	if err != nil {
+		return err
+	}
+
+	// Initialize struct values
+	database.VirtualPackages = make(map[string][]*BPMDatabaseEntry)
+	database.Name = db.Name
+	switch db.VerificationLevel {
+	case "0", "none":
+		database.VerificationLevel = VerificationLevelNone
+	case "1", "all":
+		database.VerificationLevel = VerificationLevelAll
+	case "2", "trusted":
+		database.VerificationLevel = VerificationLevelTrusted
+	default:
+		database.VerificationLevel = VerificationLevelAll
+	}
+	database.Source = db.Source
+
+	for entryName, entry := range database.Entries {
+		entry.Database = database
 
-		// Create database entries
 		if entry.Info.IsSplitPackage() {
+			delete(database.Entries, entryName)
+
+			// Handle split packages
 			for _, splitPkg := range entry.Info.SplitPackages {
 				// Turn split package into json data
 				splitPkgJson, err := yaml.Marshal(splitPkg)
@@ -101,35 +114,33 @@ func (db *BPMDatabase) ReadLocalDatabase() error {
 				splitPkgClone.Url = entry.Info.Url
 
 				// Create entry for split package
-				db.Entries[splitPkg.Name] = &BPMDatabaseEntry{
+				database.Entries[splitPkg.Name] = &BPMDatabaseEntry{
 					Info:          &splitPkgClone,
-					Download:      entry.Download,
+					Filepath:      entry.Filepath,
 					DownloadSize:  entry.DownloadSize,
 					InstalledSize: 0,
-					Database:      db,
+					Database:      database,
 				}
 
 				// Add virtual packages to database
 				for _, p := range splitPkg.Provides {
-					db.VirtualPackages[p] = append(db.VirtualPackages[p], splitPkg.Name)
+					database.VirtualPackages[p] = append(database.VirtualPackages[p], database.Entries[splitPkg.Name])
 				}
 			}
 		} else {
-			// Create entry for package
-			db.Entries[entry.Info.Name] = &entry
-
 			// Add virtual packages to database
 			for _, p := range entry.Info.Provides {
-				db.VirtualPackages[p] = append(db.VirtualPackages[p], entry.Info.Name)
+				database.VirtualPackages[p] = append(database.VirtualPackages[p], entry)
 			}
 		}
-
 	}
 
+	BPMDatabases[db.Name] = database
+
 	return nil
 }
 
-func (db *BPMDatabase) SyncLocalDatabaseFile() error {
+func (db *configDatabase) SyncLocalDatabaseFile() error {
 	dbFile := "/var/lib/bpm/databases/" + db.Name + ".bpmdb"
 
 	// Get URL to database
@@ -139,17 +150,29 @@ func (db *BPMDatabase) SyncLocalDatabaseFile() error {
 	}
 
 	// Retrieve data from URL
-	resp, err := http.Get(u)
+	req, err := http.NewRequest("GET", u, nil)
+	if err != nil {
+		return err
+	}
+
+	resp, err := http.DefaultClient.Do(req)
 	if err != nil {
 		return err
 	}
 	defer resp.Body.Close()
 
-	// Load data into byte buffer
-	buffer, err := io.ReadAll(resp.Body)
+	// Create progress bar
+	bar := createProgressBar(resp.ContentLength, "Syncing "+db.Name, false)
+
+	// Copy data
+	var buffer bytes.Buffer
+	_, err = io.Copy(io.MultiWriter(&buffer, bar), resp.Body)
+	if err != nil {
+		return err
+	}
 
 	// Unmarshal data to ensure it is a valid BPM database
-	err = yaml.Unmarshal(buffer, &BPMDatabase{})
+	err = yaml.Unmarshal(buffer.Bytes(), &BPMDatabase{})
 	if err != nil {
 		return fmt.Errorf("could not decode database: %s", err)
 	}
@@ -167,17 +190,13 @@ func (db *BPMDatabase) SyncLocalDatabaseFile() error {
 	}
 	defer out.Close()
 
-	_, err = out.Write(buffer)
+	_, err = out.Write(buffer.Bytes())
 
 	return nil
 }
 
 func ReadLocalDatabaseFiles() (err error) {
 	for _, db := range MainBPMConfig.Databases {
-		// Initialize struct values
-		db.Entries = make(map[string]*BPMDatabaseEntry)
-		db.VirtualPackages = make(map[string][]string)
-
 		// Read database
 		err = db.ReadLocalDatabase()
 		if err != nil {
@@ -188,15 +207,6 @@ func ReadLocalDatabaseFiles() (err error) {
 	return nil
 }
 
-func GetDatabase(name string) *BPMDatabase {
-	for _, db := range MainBPMConfig.Databases {
-		if db.Name == name {
-			return db
-		}
-	}
-	return nil
-}
-
 func GetDatabaseEntry(str string) (*BPMDatabaseEntry, *BPMDatabase, error) {
 	split := strings.Split(str, "/")
 	if len(split) == 1 {
@@ -204,7 +214,7 @@ func GetDatabaseEntry(str string) (*BPMDatabaseEntry, *BPMDatabase, error) {
 		if pkgName == "" {
 			return nil, nil, errors.New("could not find database entry for this package")
 		}
-		for _, db := range MainBPMConfig.Databases {
+		for _, db := range BPMDatabases {
 			if db.ContainsPackage(pkgName) {
 				return db.Entries[pkgName], db, nil
 			}
@@ -216,7 +226,7 @@ func GetDatabaseEntry(str string) (*BPMDatabaseEntry, *BPMDatabase, error) {
 		if dbName == "" || pkgName == "" {
 			return nil, nil, errors.New("could not find database entry for this package")
 		}
-		db := GetDatabase(dbName)
+		db := BPMDatabases[dbName]
 		if db == nil || !db.ContainsPackage(pkgName) {
 			return nil, nil, errors.New("could not find database entry for this package")
 		}
@@ -227,7 +237,7 @@ func GetDatabaseEntry(str string) (*BPMDatabaseEntry, *BPMDatabase, error) {
 }
 
 func FindReplacement(pkg string) *BPMDatabaseEntry {
-	for _, db := range MainBPMConfig.Databases {
+	for _, db := range BPMDatabases {
 		for _, entry := range db.Entries {
 			for _, replaced := range entry.Info.Replaces {
 				if replaced == pkg {
@@ -240,43 +250,348 @@ func FindReplacement(pkg string) *BPMDatabaseEntry {
 	return nil
 }
 
-func ResolveVirtualPackage(vpkg string) *BPMDatabaseEntry {
-	for _, db := range MainBPMConfig.Databases {
-		if v, ok := db.VirtualPackages[vpkg]; ok {
-			for _, pkg := range v {
-				return db.Entries[pkg]
+func GetDatabaseVirtualPackageEntry(vpkg string) (providers []*BPMDatabaseEntry) {
+	for _, db := range BPMDatabases {
+		providers = append(providers, db.VirtualPackages[vpkg]...)
+	}
+
+	slices.SortFunc(providers, func(a, b *BPMDatabaseEntry) int {
+		return strings.Compare(a.Info.Name, b.Info.Name)
+	})
+
+	return providers
+}
+
+func (db *BPMDatabase) FetchPackage(pkg string) (string, error) {
+	// Check if package exists in database
+	if !db.ContainsPackage(pkg) {
+		return "", errors.New("could not fetch package '" + pkg + "'")
+	}
+
+	// Get package url from database
+	entry := db.Entries[pkg]
+	u, err := url.JoinPath(db.Source, entry.Filepath)
+	if err != nil {
+		return "", err
+	}
+
+	// Download package from url
+	filepath := path.Join("/var/cache/bpm/fetched/", path.Base(entry.Filepath))
+	err = downloadFile("Downloading "+entry.Info.Name, u, filepath, 0644)
+	if err != nil {
+		return "", err
+	}
+
+	// Download and verify signature if required
+	if db.VerificationLevel != VerificationLevelNone {
+		err = downloadFile("", u+".sig", filepath+".sig", 0644)
+		if err != nil {
+			return "", err
+		}
+
+		err := VerifySignature(filepath, filepath+".sig", db.VerificationLevel == VerificationLevelTrusted, "/")
+		if err != nil {
+			return "", fmt.Errorf("Could not verify signature for %s: %s", filepath, err)
+		}
+	}
+
+	return filepath, nil
+}
+
+func (entry *BPMDatabaseEntry) GetEntryDependants() (dependants []string) {
+	dependantsMap := make(map[string][]string)
+
+	// Loop through all entries
+	for _, db := range BPMDatabases {
+		for _, e := range db.Entries {
+			// Skip iteration if comparing the same packages
+			if e.Info.Name == entry.Info.Name {
+				continue
+			}
+
+			// Add installed package to list if its dependencies include pkgName
+			if slices.ContainsFunc(e.Info.Depends, func(n string) bool {
+				n, _, _ = SplitPkgNameAndVersion(n)
+				return n == entry.Info.Name
+			}) {
+				dependantsMap[e.Info.Name] = append(dependantsMap[e.Info.Name], db.Name)
+				continue
+			}
+
+			// Add installed package to list if its runtime dependencies include pkgName
+			if slices.ContainsFunc(e.Info.RuntimeDepends, func(n string) bool {
+				n, _, _ = SplitPkgNameAndVersion(n)
+				return n == entry.Info.Name
+			}) {
+				dependantsMap[e.Info.Name] = append(dependantsMap[e.Info.Name], db.Name)
+				continue
+			}
+
+			// Loop through each virtual package
+			for _, vpkg := range entry.Info.Provides {
+				// Add installed package to list if its dependencies contain a provided virtual package
+				if slices.ContainsFunc(e.Info.Depends, func(n string) bool {
+					n, _, _ = SplitPkgNameAndVersion(n)
+					return n == vpkg
+				}) {
+					dependantsMap[e.Info.Name] = append(dependantsMap[e.Info.Name], db.Name)
+					break
+				}
+
+				// Add installed package to list if its runtime dependencies contain a provided virtual package
+				if slices.ContainsFunc(e.Info.RuntimeDepends, func(n string) bool {
+					n, _, _ = SplitPkgNameAndVersion(n)
+					return n == vpkg
+				}) {
+					dependantsMap[e.Info.Name] = append(dependantsMap[e.Info.Name], db.Name)
+					break
+				}
 			}
 		}
 	}
 
-	return nil
+	// Get keys
+	keySlice := slices.Collect(maps.Keys(dependantsMap))
+	slices.Sort(keySlice)
+
+	// Add all dependant entries to slice in alphabetical order
+	for _, entryName := range keySlice {
+		dbs := dependantsMap[entryName]
+		if len(dbs) > 1 {
+			for _, db := range dbs {
+				dependants = append(dependants, db+"/"+entryName)
+			}
+		} else {
+			dependants = append(dependants, entryName)
+		}
+	}
+
+	return dependants
 }
 
-func (db *BPMDatabase) FetchPackage(pkg string) (string, error) {
-	if !db.ContainsPackage(pkg) {
-		return "", errors.New("could not fetch package '" + pkg + "'")
-	}
-	entry := db.Entries[pkg]
-	URL, err := url.JoinPath(db.Source, entry.Download)
-	if err != nil {
-		return "", err
-	}
-	resp, err := http.Get(URL)
-	if err != nil {
-		return "", err
-	}
-	defer resp.Body.Close()
+func (entry *BPMDatabaseEntry) GetEntryOptionalDependants() (dependants []string) {
+	dependantsMap := make(map[string][]string)
+	for _, db := range BPMDatabases {
+		for _, e := range db.Entries {
+			if slices.ContainsFunc(e.Info.OptionalDepends, func(n string) bool {
+				// Remove optional dependency comment
+				n = strings.SplitN(n, ":", 2)[0]
 
-	err = os.MkdirAll("/var/cache/bpm/fetched/", 0755)
-	if err != nil {
-		return "", err
-	}
-	out, err := os.Create("/var/cache/bpm/fetched/" + path.Base(entry.Download))
-	if err != nil {
-		return "", err
-	}
-	defer out.Close()
+				// Remove required version
+				n, _, _ = SplitPkgNameAndVersion(n)
 
-	_, err = io.Copy(out, resp.Body)
-	return "/var/cache/bpm/fetched/" + path.Base(entry.Download), nil
+				return n == entry.Info.Name
+			}) {
+				dependantsMap[e.Info.Name] = append(dependantsMap[e.Info.Name], e.Database.Name)
+			}
+		}
+	}
+
+	// Get keys
+	keySlice := slices.Collect(maps.Keys(dependantsMap))
+	slices.Sort(keySlice)
+
+	// Add all dependant entries to slice in alphabetical order
+	for _, entryName := range keySlice {
+		dbs := dependantsMap[entryName]
+		if len(dbs) > 1 {
+			for _, db := range dbs {
+				dependants = append(dependants, db+"/"+entryName)
+			}
+		} else {
+			dependants = append(dependants, entryName)
+		}
+	}
+
+	return dependants
+}
+
+func (entry *BPMDatabaseEntry) GetEntryMakeDependants() (dependants []string) {
+	dependantsMap := make(map[string][]string)
+	for _, db := range BPMDatabases {
+		for _, e := range db.Entries {
+			if slices.ContainsFunc(e.Info.MakeDepends, func(n string) bool {
+				n, _, _ = SplitPkgNameAndVersion(n)
+				return n == entry.Info.Name
+			}) {
+				dependantsMap[e.Info.Name] = append(dependantsMap[e.Info.Name], e.Database.Name)
+			}
+		}
+	}
+
+	// Get keys
+	keySlice := slices.Collect(maps.Keys(dependantsMap))
+	slices.Sort(keySlice)
+
+	// Add all dependant entries to slice in alphabetical order
+	for _, entryName := range keySlice {
+		dbs := dependantsMap[entryName]
+		if len(dbs) > 1 {
+			for _, db := range dbs {
+				dependants = append(dependants, db+"/"+entryName)
+			}
+		} else {
+			dependants = append(dependants, entryName)
+		}
+	}
+
+	return dependants
+}
+
+func (entry *BPMDatabaseEntry) CreateReadableInfo(rootDir string, showBytes bool) string {
+	builder := strings.Builder{}
+	builderWriteStringNotEmpty := func(label string, value string) {
+		if value != "" {
+			builder.WriteString(label + ": " + value + "\n")
+		}
+	}
+	builderWriteArray := func(label string, array []string, sort bool) {
+		if len(array) == 0 {
+			return
+		}
+
+		// Sort array
+		if sort {
+			slices.Sort(array)
+		}
+
+		builder.WriteString(label + " (" + strconv.Itoa(len(array)) + "):\n")
+		for _, val := range array {
+			builder.WriteString("  - " + val + "\n")
+		}
+	}
+	builderWriteDependencyArray := func(label string, depends []string) {
+		if len(depends) == 0 {
+			return
+		}
+
+		// Sort array
+		slices.Sort(depends)
+
+		builder.WriteString(label + " (" + strconv.Itoa(len(depends)) + "):\n")
+		for _, val := range depends {
+			builder.WriteString("  - " + val)
+
+			// Show virtual package providers
+			if providers := GetDatabaseVirtualPackageEntry(val); len(providers) > 0 {
+				builder.WriteString(" (")
+				for i, vpkg := range providers {
+					if i == len(providers)-1 {
+						builder.WriteString(vpkg.Info.Name)
+					} else {
+						builder.WriteString(vpkg.Info.Name + ", ")
+					}
+				}
+				builder.WriteString(")")
+			}
+
+			builder.WriteString("\n")
+		}
+	}
+
+	// Main information
+	builder.WriteString("Name: " + entry.Info.Name + "\n")
+	builder.WriteString("Database: " + entry.Database.Name + "\n")
+	builder.WriteString("Description: " + entry.Info.Description + "\n")
+	builder.WriteString("Version: " + entry.Info.GetFullVersion() + "\n")
+	builderWriteStringNotEmpty("URL", entry.Info.Url)
+	builderWriteStringNotEmpty("License", entry.Info.License)
+	builderWriteArray("Maintainers", entry.Info.Maintainers, false)
+	builder.WriteString("Architecture: " + entry.Info.Arch + "\n")
+	if entry.Info.Type == "source" && entry.Info.OutputArch != "" && entry.Info.OutputArch != GetArch() {
+		builder.WriteString("Output architecture: " + entry.Info.OutputArch + "\n")
+	}
+	builder.WriteString("Type: " + entry.Info.Type + "\n")
+
+	// Dependencies
+	builderWriteDependencyArray("Dependencies", entry.Info.Depends)
+	if entry.Info.Type == "source" {
+		builderWriteDependencyArray("Make dependencies", entry.Info.MakeDepends)
+		builderWriteDependencyArray("Check dependencies", entry.Info.CheckDepends)
+	}
+	builderWriteDependencyArray("Runtime dependencies", entry.Info.RuntimeDepends)
+	if len(entry.Info.OptionalDepends) > 0 {
+		builder.WriteString("Optional dependencies: (" + strconv.Itoa(len(entry.Info.OptionalDepends)) + ")\n")
+		for _, depend := range entry.Info.OptionalDepends {
+			dependSplit := strings.SplitN(depend, ":", 2)
+			if len(dependSplit) == 2 {
+				builder.WriteString(fmt.Sprintf("  - %s (%s)", dependSplit[0], dependSplit[1]))
+			} else {
+				builder.WriteString("  - " + dependSplit[0])
+			}
+
+			// Show virtual package providers
+			if providers := GetDatabaseVirtualPackageEntry(dependSplit[0]); len(providers) > 0 {
+				builder.WriteString(" (")
+				for i, vpkg := range providers {
+					if i == len(providers)-1 {
+						builder.WriteString(vpkg.Info.Name)
+					} else {
+						builder.WriteString(vpkg.Info.Name + ", ")
+					}
+				}
+				builder.WriteString(")")
+			}
+
+			builder.WriteString("\n")
+		}
+	}
+	builderWriteArray("Dependant packages", entry.GetEntryDependants(), true)
+	builderWriteArray("Optionally dependant packages", entry.GetEntryOptionalDependants(), true)
+	builderWriteArray("Make dependant packages", entry.GetEntryMakeDependants(), true)
+
+	// Other package relations
+	builderWriteArray("Conflicting packages", entry.Info.Conflicts, true)
+	builderWriteArray("Provided packages", entry.Info.Provides, true)
+	builderWriteArray("Replaces packages", entry.Info.Replaces, true)
+
+	// Split packages
+	if entry.Info.Type == "source" && len(entry.Info.SplitPackages) != 0 {
+		splitPkgs := make([]string, len(entry.Info.SplitPackages))
+		for i, splitPkgInfo := range entry.Info.SplitPackages {
+			splitPkgs[i] = splitPkgInfo.Name
+		}
+		builderWriteArray("Split packages", splitPkgs, true)
+	}
+
+	// Installation reason
+	if rootDir != "" && IsPackageInstalled(entry.Info.Name, rootDir) {
+		installationReason := GetPackage(entry.Info.Name, rootDir).LocalInfo.GetInstallationReason()
+		var installationReasonString string
+		switch installationReason {
+		case InstallationReasonManual:
+			installationReasonString = "Manual"
+		case InstallationReasonDependency:
+			installationReasonString = "Dependency"
+		case InstallationReasonMakeDependency:
+			installationReasonString = "Make dependency"
+		default:
+			installationReasonString = "Unknown"
+		}
+		builder.WriteString("Installation reason: " + installationReasonString + "\n")
+	}
+
+	// Download size
+	downloadSize := entry.DownloadSize
+	var downloadSizeStr string
+	if showBytes {
+		downloadSizeStr = strconv.FormatInt(downloadSize, 10)
+	} else {
+		downloadSizeStr = BytesToHumanReadable(downloadSize)
+	}
+	builder.WriteString("Download size: " + downloadSizeStr + "\n")
+
+	// Installed size
+	if entry.Info.Type == "binary" {
+		installedSize := entry.InstalledSize
+		var installedSizeStr string
+		if showBytes {
+			installedSizeStr = strconv.FormatInt(installedSize, 10)
+		} else {
+			installedSizeStr = BytesToHumanReadable(installedSize)
+		}
+		builder.WriteString("Installed size: " + installedSizeStr + "\n")
+	}
+
+	return strings.TrimSpace(builder.String())
 }

src/bpmlib/dependencies.go

@@ -1,225 +1,247 @@
 package bpmlib
 
 import (
-	"errors"
-	"fmt"
 	"slices"
+	"strings"
 )
 
-type pkgInstallationReason struct {
-	PkgName            string
-	InstallationReason InstallationReason
-}
-
-func (pkgInfo *PackageInfo) GetDependencies(includeMakeDepends, includeOptionalDepends bool) []pkgInstallationReason {
-	allDepends := make([]pkgInstallationReason, 0)
-
-	for _, depend := range pkgInfo.Depends {
-		if !slices.ContainsFunc(allDepends, func(p pkgInstallationReason) bool {
-			return p.PkgName == depend
-		}) {
-			allDepends = append(allDepends, pkgInstallationReason{
-				PkgName:            depend,
-				InstallationReason: InstallationReasonDependency,
-			})
-		}
-	}
-	if includeOptionalDepends {
-		for _, depend := range pkgInfo.OptionalDepends {
-			if !slices.ContainsFunc(allDepends, func(p pkgInstallationReason) bool {
-				return p.PkgName == depend
-			}) {
-				allDepends = append(allDepends, pkgInstallationReason{
-					PkgName:            depend,
-					InstallationReason: InstallationReasonDependency,
-				})
-			}
-		}
-	}
-	if includeMakeDepends {
-		for _, depend := range pkgInfo.MakeDepends {
-			if !slices.ContainsFunc(allDepends, func(p pkgInstallationReason) bool {
-				return p.PkgName == depend
-			}) {
-				allDepends = append(allDepends, pkgInstallationReason{
-					PkgName:            depend,
-					InstallationReason: InstallationReasonMakeDependency,
-				})
-			}
-		}
-	}
-	return allDepends
-}
-
-func (pkgInfo *PackageInfo) GetAllDependencies(includeMakeDepends, includeOptionalDepends bool, rootDir string) (resolved []string) {
-	// Initialize slices
-	resolved = make([]string, 0)
-	unresolved := make([]string, 0)
-
-	// Call unexported function
-	pkgInfo.getAllDependencies(&resolved, &unresolved, includeMakeDepends, includeOptionalDepends, rootDir)
-
-	return resolved
-}
-
-func (pkgInfo *PackageInfo) getAllDependencies(resolved *[]string, unresolved *[]string, includeMakeDepends, includeOptionalDepends bool, rootDir string) {
-	// Add current package name to unresolved slice
-	*unresolved = append(*unresolved, pkgInfo.Name)
-
-	// Loop through all dependencies
-	for _, pkgIR := range pkgInfo.GetDependencies(includeMakeDepends, includeOptionalDepends) {
-		depend := pkgIR.PkgName
-
-		if isVirtual, p := IsVirtualPackage(depend, rootDir); isVirtual {
-			depend = p
-		}
-
-		if !slices.Contains(*resolved, depend) {
-			// Add current dependency to resolved slice when circular dependency is detected
-			if slices.Contains(*unresolved, depend) {
-				if !slices.Contains(*resolved, depend) {
-					*resolved = append(*resolved, depend)
-				}
-				continue
-			}
-
-			dependInfo := GetPackageInfo(depend, rootDir)
-
-			if dependInfo != nil {
-				dependInfo.getAllDependencies(resolved, unresolved, includeMakeDepends, includeOptionalDepends, rootDir)
-			}
-		}
-	}
-	if !slices.Contains(*resolved, pkgInfo.Name) {
-		*resolved = append(*resolved, pkgInfo.Name)
-	}
-	*unresolved = stringSliceRemove(*unresolved, pkgInfo.Name)
-}
-
-func ResolveAllPackageDependenciesFromDatabases(pkgInfo *PackageInfo, checkMake, checkOptional, ignoreInstalled, verbose bool, rootDir string) (resolved []pkgInstallationReason, unresolved []string) {
-	// Initialize slices
-	resolved = make([]pkgInstallationReason, 0)
-	unresolved = make([]string, 0)
-
-	// Call unexported function
-	resolvePackageDependenciesFromDatabase(&resolved, &unresolved, pkgInfo, checkMake, checkOptional, ignoreInstalled, verbose, rootDir)
-
-	// Remove main package from unresolved slice
-	unresolved = stringSliceRemove(unresolved, pkgInfo.Name)
-
-	return resolved, unresolved
-}
-
-func resolvePackageDependenciesFromDatabase(resolved *[]pkgInstallationReason, unresolved *[]string, pkgInfo *PackageInfo, checkMake, checkOptional, ignoreInstalled, verbose bool, rootDir string) {
-	// Add current package name to unresolved slice
-	*unresolved = append(*unresolved, pkgInfo.Name)
-
-	// Loop through all dependencies
-	for _, pkgIR := range pkgInfo.GetDependencies(pkgInfo.Type == "source", checkOptional) {
-		// Skip dependency if it has already been resolved
-		if slices.ContainsFunc(*resolved, func(p pkgInstallationReason) bool {
-			return p.PkgName == pkgIR.PkgName
-		}) {
-			continue
-		}
-
-		// Add current dependency to resolved slice when circular dependency is detected
-		if slices.Contains(*unresolved, pkgIR.PkgName) {
-			if verbose {
-				fmt.Printf("Circular dependency was detected (%s -> %s). Installing %s first\n", pkgInfo.Name, pkgIR.PkgName, pkgIR.PkgName)
-			}
-
-			*resolved = append(*resolved, pkgInstallationReason{
-				PkgName:            pkgIR.PkgName,
-				InstallationReason: pkgIR.InstallationReason,
-			})
-			continue
-		}
-
-		// Skip dependency if it is already installed or provided
-		if ignoreInstalled && IsPackageProvided(pkgIR.PkgName, rootDir) {
-			continue
-		}
-
-		// Get database entry for dependency
-		var err error
-		var entry *BPMDatabaseEntry
-		entry, _, err = GetDatabaseEntry(pkgIR.PkgName)
-		if err != nil {
-			if entry = ResolveVirtualPackage(pkgIR.PkgName); entry == nil {
-				if !slices.Contains(*unresolved, pkgIR.PkgName) {
-					*unresolved = append(*unresolved, pkgIR.PkgName)
-				}
-				continue
-			}
-		}
-
-		// Resolve the dependencies of this dependency
-		resolvePackageDependenciesFromDatabase(resolved, unresolved, entry.Info, checkMake, checkOptional, ignoreInstalled, verbose, rootDir)
-
-		// Move dependency from the unresolved slice to the resolved slice
-		if !slices.ContainsFunc(*resolved, func(p pkgInstallationReason) bool {
-			return p.PkgName == entry.Info.Name
-		}) {
-			*resolved = append(*resolved, pkgInstallationReason{
-				PkgName:            entry.Info.Name,
-				InstallationReason: pkgIR.InstallationReason,
-			})
-		}
-		*unresolved = stringSliceRemove(*unresolved, entry.Info.Name)
-	}
-}
-
-func GetPackageDependants(pkgName string, rootDir string) ([]string, error) {
-	ret := make([]string, 0)
-
-	// Get BPM package
-	pkg := GetPackage(pkgName, rootDir)
-	if pkg == nil {
-		return nil, errors.New("package not found: " + pkgName)
-	}
-
+func (pkgInfo *PackageInfo) GetPackageDependants(rootDir string, skipMultipleProviders bool) (dependants []string) {
 	// Get installed package names
-	pkgs, err := GetInstalledPackages(rootDir)
-	if err != nil {
-		return nil, errors.New("could not get installed packages")
+	pkgs, ok := localPackageInformation[rootDir]
+	if !ok {
+		return nil
 	}
 
 	// Loop through all installed packages
-	for _, installedPkgName := range pkgs {
-		// Get installed BPM package
-		installedPkg := GetPackage(installedPkgName, rootDir)
-		if installedPkg == nil {
-			return nil, errors.New("package not found: " + installedPkgName)
-		}
-
+	for _, installedPkg := range pkgs {
 		// Skip iteration if comparing the same packages
-		if installedPkg.PkgInfo.Name == pkgName {
+		if installedPkg.Name == pkgInfo.Name {
 			continue
 		}
 
-		// Get installed package dependencies
-		dependencies := installedPkg.PkgInfo.GetDependencies(false, true)
-
 		// Add installed package to list if its dependencies include pkgName
-		if slices.ContainsFunc(dependencies, func(p pkgInstallationReason) bool {
-			return p.PkgName == pkgName
+		if slices.ContainsFunc(installedPkg.Depends, func(n string) bool {
+			n, _, _ = SplitPkgNameAndVersion(n)
+			return n == pkgInfo.Name
 		}) {
-			ret = append(ret, installedPkgName)
+			dependants = append(dependants, installedPkg.Name)
+			continue
+		}
+
+		// Add installed package to list if its runtime dependencies include pkgName
+		if slices.ContainsFunc(installedPkg.RuntimeDepends, func(n string) bool {
+			n, _, _ = SplitPkgNameAndVersion(n)
+			return n == pkgInfo.Name
+		}) {
+			dependants = append(dependants, installedPkg.Name)
 			continue
 		}
 
 		// Loop through each virtual package
-		for _, vpkg := range pkg.PkgInfo.Provides {
+		for _, vpkg := range pkgInfo.Provides {
+			if skipMultipleProviders && len(GetVirtualPackageInfo(vpkg, rootDir)) > 1 {
+				continue
+			}
+
 			// Add installed package to list if its dependencies contain a provided virtual package
-			if slices.ContainsFunc(dependencies, func(p pkgInstallationReason) bool {
-				return p.PkgName == vpkg
+			if slices.ContainsFunc(installedPkg.Depends, func(n string) bool {
+				n, _, _ = SplitPkgNameAndVersion(n)
+				return n == vpkg
 			}) {
-				ret = append(ret, installedPkgName)
+				dependants = append(dependants, installedPkg.Name)
+				break
+			}
+
+			// Add installed package to list if its runtime dependencies contain a provided virtual package
+			if slices.ContainsFunc(installedPkg.RuntimeDepends, func(n string) bool {
+				n, _, _ = SplitPkgNameAndVersion(n)
+				return n == vpkg
+			}) {
+				dependants = append(dependants, installedPkg.Name)
 				break
 			}
 		}
 	}
 
-	return ret, nil
+	return dependants
+}
+
+func (pkgInfo *PackageInfo) GetPackageOptionalDependants(rootDir string) (dependants []string) {
+	// Get installed package names
+	pkgs, ok := localPackageInformation[rootDir]
+	if !ok {
+		return nil
+	}
+
+	// Loop through all installed packages
+	for _, installedPkg := range pkgs {
+		// Skip iteration if comparing the same packages
+		if installedPkg.Name == pkgInfo.Name {
+			continue
+		}
+
+		// Add installed package to list if its optional dependencies include pkgName
+		if slices.ContainsFunc(installedPkg.OptionalDepends, func(n string) bool {
+			// Remove optional dependency comment
+			n = strings.SplitN(n, ":", 2)[0]
+
+			// Remove required version
+			n, _, _ = SplitPkgNameAndVersion(n)
+
+			return n == pkgInfo.Name
+		}) {
+			dependants = append(dependants, installedPkg.Name)
+			continue
+		}
+
+		// Loop through each virtual package
+		for _, vpkg := range pkgInfo.Provides {
+			// Add installed package to list if its optional dependencies contain a provided virtual package
+			if slices.ContainsFunc(installedPkg.OptionalDepends, func(n string) bool {
+				// Remove optional dependency comment
+				n = strings.SplitN(n, ":", 2)[0]
+
+				// Remove required version
+				n, _, _ = SplitPkgNameAndVersion(n)
+
+				return n == vpkg
+			}) {
+				dependants = append(dependants, installedPkg.Name)
+				break
+			}
+		}
+	}
+
+	return dependants
+}
+
+type ResolvedPackage struct {
+	DatabaseEntry      *BPMDatabaseEntry
+	InstallationReason InstallationReason
+}
+
+func ResolveDependencies(pkgInfo *PackageInfo, resolvedVirtualPackages map[string]string, includeRuntimeDepends bool, rootDir string) (resolved []ResolvedPackage, unresolved []string) {
+	visited := make([]string, 0)
+
+	var dfs func(resolvedPkg *PackageInfo)
+	dfs = func(pkgInfo *PackageInfo) {
+		checkDependencies := func(dependencies []string, installationReason InstallationReason) {
+			for _, depend := range dependencies {
+				// Split dependency name and required version
+				dependName, _, _ := SplitPkgNameAndVersion(depend)
+
+				// Ignore if package is already installed
+				if IsPackageInstalled(dependName, rootDir) && EvaluateDependency(depend, GetPackageInfo(dependName, rootDir).Version) {
+					continue
+				} else if providers := GetVirtualPackageInfo(dependName, rootDir); len(providers) > 0 {
+					continue
+				}
+
+				// Find database entry for dependency
+				var dependEntry *BPMDatabaseEntry
+				if resolvedVpkg, ok := resolvedVirtualPackages[dependName]; ok {
+					dependEntry, _, _ = GetDatabaseEntry(resolvedVpkg)
+				} else if entry, _, _ := GetDatabaseEntry(dependName); entry != nil {
+					dependEntry = entry
+				} else if providers := GetDatabaseVirtualPackageEntry(dependName); len(providers) > 0 {
+					dependEntry = providers[0]
+				}
+
+				if dependEntry == nil {
+					unresolved = append(unresolved, depend)
+					continue
+				}
+
+				// Ensure entry has required version
+				if !EvaluateDependency(depend, dependEntry.Info.Version) {
+					unresolved = append(unresolved, depend)
+					continue
+				}
+
+				// Skip ignored packages in config
+				if rootDir == "/" && slices.Contains(MainBPMConfig.IgnorePackages, dependEntry.Info.Name) {
+					continue
+				}
+
+				if !slices.Contains(visited, dependEntry.Info.Name) {
+					dfs(dependEntry.Info)
+					resolved = append(resolved, ResolvedPackage{DatabaseEntry: dependEntry, InstallationReason: installationReason})
+				}
+			}
+		}
+
+		visited = append(visited, pkgInfo.Name)
+
+		checkDependencies(pkgInfo.Depends, InstallationReasonDependency)
+		if includeRuntimeDepends {
+			checkDependencies(pkgInfo.RuntimeDepends, InstallationReasonDependency)
+		}
+		if pkgInfo.Type == "source" {
+			checkDependencies(pkgInfo.MakeDepends, InstallationReasonMakeDependency)
+			checkDependencies(pkgInfo.CheckDepends, InstallationReasonMakeDependency)
+		}
+	}
+
+	dfs(pkgInfo)
+
+	return resolved, unresolved
+}
+
+func SplitPkgNameAndVersion(pkg string) (string, string, string) {
+	if strings.Contains(pkg, ">=") {
+		pkgSplit := strings.SplitN(pkg, ">=", 2)
+		pkgName := pkgSplit[0]
+		pkgVersion := pkgSplit[1]
+
+		return pkgName, ">=", pkgVersion
+	} else if strings.Contains(pkg, ">") {
+		pkgSplit := strings.SplitN(pkg, ">", 2)
+		pkgName := pkgSplit[0]
+		pkgVersion := pkgSplit[1]
+
+		return pkgName, ">", pkgVersion
+	} else if strings.Contains(pkg, "<=") {
+		pkgSplit := strings.SplitN(pkg, "<=", 2)
+		pkgName := pkgSplit[0]
+		pkgVersion := pkgSplit[1]
+
+		return pkgName, "<=", pkgVersion
+	} else if strings.Contains(pkg, "<") {
+		pkgSplit := strings.SplitN(pkg, "<", 2)
+		pkgName := pkgSplit[0]
+		pkgVersion := pkgSplit[1]
+
+		return pkgName, "<", pkgVersion
+	} else if strings.Contains(pkg, "=") {
+		pkgSplit := strings.SplitN(pkg, "=", 2)
+		pkgName := pkgSplit[0]
+		pkgVersion := pkgSplit[1]
+
+		return pkgName, "=", pkgVersion
+	}
+
+	return pkg, "", ""
+}
+
+func EvaluateDependency(pkg, matchVersion string) bool {
+	_, comparisonSymbol, pkgVersion := SplitPkgNameAndVersion(pkg)
+
+	switch comparisonSymbol {
+	case ">=":
+		return CompareVersions(matchVersion, pkgVersion) >= 0
+	case ">":
+		return CompareVersions(matchVersion, pkgVersion) > 0
+	case "<=":
+		return CompareVersions(matchVersion, pkgVersion) <= 0
+	case "<":
+		return CompareVersions(matchVersion, pkgVersion) < 0
+	case "=":
+		if cutPkgVersion, ok := strings.CutSuffix(pkgVersion, "*"); ok {
+			return strings.HasPrefix(matchVersion, cutPkgVersion)
+		} else {
+			return CompareVersions(matchVersion, pkgVersion) == 0
+		}
+	default:
+		return true
+	}
 }

src/bpmlib/errors.go

@@ -2,6 +2,7 @@ package bpmlib
 
 import (
 	"fmt"
+	"slices"
 	"strings"
 )
 
@@ -10,6 +11,7 @@ type PackageNotFoundErr struct {
 }
 
 func (e PackageNotFoundErr) Error() string {
+	slices.Sort(e.packages)
 	return "The following packages were not found in any databases: " + strings.Join(e.packages, ", ")
 }
 
@@ -18,6 +20,7 @@ type DependencyNotFoundErr struct {
 }
 
 func (e DependencyNotFoundErr) Error() string {
+	slices.Sort(e.dependencies)
 	return "The following dependencies were not found in any databases: " + strings.Join(e.dependencies, ", ")
 }
 
@@ -27,6 +30,7 @@ type PackageConflictErr struct {
 }
 
 func (e PackageConflictErr) Error() string {
+	slices.Sort(e.conflicts)
 	return fmt.Sprintf("Package (%s) is in conflict with the following packages: %s", e.pkg, strings.Join(e.conflicts, ", "))
 
 }
@@ -40,3 +44,11 @@ type PackageScriptErr struct {
 func (e PackageScriptErr) Error() string {
 	return fmt.Sprintf("could not execute package script (%s) for package (%s): %s", e.packageScript, e.packageName, e.err)
 }
+
+type PackageRemovalDependencyErr struct {
+	RequiredPackages map[string][]string
+}
+
+func (e PackageRemovalDependencyErr) Error() string {
+	return "removing these package would break other installed packages"
+}

src/bpmlib/general.go

@@ -4,32 +4,28 @@ import (
 	"errors"
 	"fmt"
 	"log"
+	"maps"
 	"os"
 	"path"
 	"slices"
 	"strings"
 )
 
-type ReinstallMethod uint8
-
-const (
-	ReinstallMethodNone      ReinstallMethod = iota
-	ReinstallMethodSpecified ReinstallMethod = iota
-	ReinstallMethodAll       ReinstallMethod = iota
-)
-
 // InstallPackages installs the specified packages into the given root directory by fetching them from databases or directly from local bpm archives
-func InstallPackages(rootDir string, forceInstallationReason InstallationReason, reinstallMethod ReinstallMethod, installOptionalDependencies, forceInstallation, verbose bool, packages ...string) (operation *BPMOperation, err error) {
-
+func InstallPackages(rootDir string, forceInstallationReason InstallationReason, reinstallPackages bool, installRuntimeDependencies, forceInstallation, runChecks bool, verbose bool, packages ...string) (operation *BPMOperation, err error) {
 	// Setup operation struct
 	operation = &BPMOperation{
 		Actions:           make([]OperationAction, 0),
 		UnresolvedDepends: make([]string, 0),
-		Changes:           make(map[string]string),
+		ModifiedFiles:     make(map[string]string),
+		RunChecks:         runChecks,
 		RootDir:           rootDir,
 		compiledPackages:  make(map[string]string),
 	}
 
+	// Remove duplicates from packages
+	packages = removeDuplicates(packages)
+
 	// Resolve packages
 	pkgsNotFound := make([]string, 0)
 	for _, pkg := range packages {
@@ -41,7 +37,7 @@ func InstallPackages(rootDir string, forceInstallationReason InstallationReason,
 
 			if bpmpkg.PkgInfo.Type == "source" && bpmpkg.PkgInfo.IsSplitPackage() {
 				for _, splitPkg := range bpmpkg.PkgInfo.SplitPackages {
-					if reinstallMethod == ReinstallMethodNone && IsPackageInstalled(splitPkg.Name, rootDir) && GetPackageInfo(splitPkg.Name, rootDir).GetFullVersion() == splitPkg.GetFullVersion() {
+					if !reinstallPackages && IsPackageInstalled(splitPkg.Name, rootDir) && GetPackageInfo(splitPkg.Name, rootDir).GetFullVersion() == splitPkg.GetFullVersion() {
 						continue
 					}
 
@@ -49,13 +45,13 @@ func InstallPackages(rootDir string, forceInstallationReason InstallationReason,
 					installationReason := forceInstallationReason
 					if installationReason == InstallationReasonUnknown {
 						if IsPackageInstalled(splitPkg.Name, rootDir) {
-							installationReason = GetInstallationReason(splitPkg.Name, rootDir)
+							installationReason = GetPackage(splitPkg.Name, rootDir).LocalInfo.GetInstallationReason()
 						} else {
 							installationReason = InstallationReasonManual
 						}
 					}
 
-					operation.AppendAction(&InstallPackageAction{
+					operation.Actions = append(operation.Actions, &InstallPackageAction{
 						File:                  pkg,
 						InstallationReason:    installationReason,
 						BpmPackage:            bpmpkg,
@@ -65,7 +61,7 @@ func InstallPackages(rootDir string, forceInstallationReason InstallationReason,
 				continue
 			}
 
-			if reinstallMethod == ReinstallMethodNone && IsPackageInstalled(bpmpkg.PkgInfo.Name, rootDir) && GetPackageInfo(bpmpkg.PkgInfo.Name, rootDir).GetFullVersion() == bpmpkg.PkgInfo.GetFullVersion() {
+			if !reinstallPackages && IsPackageInstalled(bpmpkg.PkgInfo.Name, rootDir) && GetPackageInfo(bpmpkg.PkgInfo.Name, rootDir).GetFullVersion() == bpmpkg.PkgInfo.GetFullVersion() {
 				continue
 			}
 
@@ -73,35 +69,44 @@ func InstallPackages(rootDir string, forceInstallationReason InstallationReason,
 			installationReason := forceInstallationReason
 			if installationReason == InstallationReasonUnknown {
 				if IsPackageInstalled(bpmpkg.PkgInfo.Name, rootDir) {
-					installationReason = GetInstallationReason(bpmpkg.PkgInfo.Name, rootDir)
+					installationReason = GetPackage(bpmpkg.PkgInfo.Name, rootDir).LocalInfo.GetInstallationReason()
 				} else {
 					installationReason = InstallationReasonManual
 				}
 			}
 
-			operation.AppendAction(&InstallPackageAction{
+			operation.Actions = append(operation.Actions, &InstallPackageAction{
 				File:               pkg,
 				InstallationReason: installationReason,
 				BpmPackage:         bpmpkg,
 			})
 		} else {
+			// Split package name and required version
+			pkgName, _, _ := SplitPkgNameAndVersion(pkg)
+
 			var entry *BPMDatabaseEntry
 
-			if e, _, err := GetDatabaseEntry(pkg); err == nil {
+			if e, _, err := GetDatabaseEntry(pkgName); err == nil {
 				entry = e
-			} else if isVirtual, p := IsVirtualPackage(pkg, rootDir); isVirtual {
-				entry, _, err = GetDatabaseEntry(p)
+			} else if providers := GetVirtualPackageInfo(pkgName, rootDir); len(providers) > 0 {
+				entry, _, err = GetDatabaseEntry(providers[0].Name)
 				if err != nil {
 					pkgsNotFound = append(pkgsNotFound, pkg)
 					continue
 				}
-			} else if e := ResolveVirtualPackage(pkg); e != nil {
-				entry = e
+			} else if providers := GetDatabaseVirtualPackageEntry(pkgName); len(providers) > 0 {
+				entry = providers[0]
 			} else {
 				pkgsNotFound = append(pkgsNotFound, pkg)
 				continue
 			}
-			if reinstallMethod == ReinstallMethodNone && IsPackageInstalled(entry.Info.Name, rootDir) && GetPackageInfo(entry.Info.Name, rootDir).GetFullVersion() == entry.Info.GetFullVersion() {
+
+			if !EvaluateDependency(pkg, entry.Info.Version) {
+				pkgsNotFound = append(pkgsNotFound, pkg)
+				continue
+			}
+
+			if !reinstallPackages && IsPackageInstalled(entry.Info.Name, rootDir) && GetPackageInfo(entry.Info.Name, rootDir).GetFullVersion() == entry.Info.GetFullVersion() {
 				continue
 			}
 
@@ -109,13 +114,13 @@ func InstallPackages(rootDir string, forceInstallationReason InstallationReason,
 			installationReason := forceInstallationReason
 			if installationReason == InstallationReasonUnknown {
 				if IsPackageInstalled(entry.Info.Name, rootDir) {
-					installationReason = GetInstallationReason(entry.Info.Name, rootDir)
+					installationReason = GetPackage(entry.Info.Name, rootDir).LocalInfo.GetInstallationReason()
 				} else {
 					installationReason = InstallationReasonManual
 				}
 			}
 
-			operation.AppendAction(&FetchPackageAction{
+			operation.Actions = append(operation.Actions, &FetchPackageAction{
 				InstallationReason: installationReason,
 				DatabaseEntry:      entry,
 			})
@@ -128,10 +133,7 @@ func InstallPackages(rootDir string, forceInstallationReason InstallationReason,
 	}
 
 	// Resolve dependencies
-	err = operation.ResolveDependencies(reinstallMethod == ReinstallMethodAll, installOptionalDependencies, verbose)
-	if err != nil {
-		return nil, fmt.Errorf("could not resolve dependencies: %s", err)
-	}
+	operation.ResolveDependencies(installRuntimeDependencies)
 	if len(operation.UnresolvedDepends) != 0 {
 		if !forceInstallation {
 			return nil, DependencyNotFoundErr{operation.UnresolvedDepends}
@@ -144,12 +146,9 @@ func InstallPackages(rootDir string, forceInstallationReason InstallationReason,
 	operation.ReplaceObsoletePackages()
 
 	// Check for conflicts
-	conflicts, err := operation.CheckForConflicts()
-	if err != nil {
-		return nil, fmt.Errorf("could not complete package conflict check: %s", err)
-	}
+	conflicts := operation.CheckForConflicts()
 	if len(conflicts) > 0 {
-		err = nil
+		err = fmt.Errorf("conflicts detected")
 		for pkg, conflict := range conflicts {
 			err = errors.Join(err, PackageConflictErr{pkg, conflict})
 		}
@@ -164,14 +163,14 @@ func InstallPackages(rootDir string, forceInstallationReason InstallationReason,
 	if rootDir != "/" {
 		sourcePackages := make([]string, 0)
 		for _, action := range operation.Actions {
-			switch action.(type) {
+			switch action := action.(type) {
 			case *InstallPackageAction:
-				if action.(*InstallPackageAction).BpmPackage.PkgInfo.Type == "source" {
-					sourcePackages = append(sourcePackages, action.(*InstallPackageAction).BpmPackage.PkgInfo.Name)
+				if action.BpmPackage.PkgInfo.Type == "source" {
+					sourcePackages = append(sourcePackages, action.BpmPackage.PkgInfo.Name)
 				}
 			case *FetchPackageAction:
-				if action.(*FetchPackageAction).DatabaseEntry.Info.Type == "source" {
-					sourcePackages = append(sourcePackages, action.(*FetchPackageAction).DatabaseEntry.Info.Name)
+				if action.DatabaseEntry.Info.Type == "source" {
+					sourcePackages = append(sourcePackages, action.DatabaseEntry.Info.Name)
 				}
 			}
 		}
@@ -186,39 +185,80 @@ func InstallPackages(rootDir string, forceInstallationReason InstallationReason,
 }
 
 // RemovePackages removes the specified packages from the given root directory
-func RemovePackages(rootDir string, removeUnusedPackagesOnly, cleanupDependencies bool, packages ...string) (operation *BPMOperation, err error) {
+func RemovePackages(rootDir string, force, cleanupDependencies bool, packages ...string) (operation *BPMOperation, err error) {
 	operation = &BPMOperation{
 		Actions:           make([]OperationAction, 0),
 		UnresolvedDepends: make([]string, 0),
-		Changes:           make(map[string]string),
+		ModifiedFiles:     make(map[string]string),
 		RootDir:           rootDir,
 		compiledPackages:  make(map[string]string),
 	}
 
+	// Remove duplicates from packages
+	packages = removeDuplicates(packages)
+
 	// Search for packages
 	for _, pkg := range packages {
 		bpmpkg := GetPackage(pkg, rootDir)
+		if providers := GetVirtualPackageInfo(pkg, rootDir); len(providers) > 0 {
+			bpmpkg = GetPackage(providers[0].Name, rootDir)
+		}
 		if bpmpkg == nil {
 			continue
 		}
-		operation.AppendAction(&RemovePackageAction{BpmPackage: bpmpkg})
-	}
-
-	// Do not remove packages which other packages depend on
-	if removeUnusedPackagesOnly {
-		err := operation.RemoveNeededPackages()
-		if err != nil {
-			return nil, fmt.Errorf("could not skip needed packages: %s", err)
-		}
+		operation.Actions = append(operation.Actions, &RemovePackageAction{BpmPackage: bpmpkg})
 	}
 
 	// Do package cleanup
 	if cleanupDependencies {
-		err := operation.Cleanup(true)
+		err := operation.Cleanup(MainBPMConfig.CleanupMakeDependencies)
 		if err != nil {
 			return nil, fmt.Errorf("could not perform cleanup for operation: %s", err)
 		}
 	}
+
+	// Return error if other packages depend on removed ones
+	if !force {
+		// Get packages and their dependants
+		packageDepndants := make(map[string][]string, 0)
+		for _, action := range operation.Actions {
+			// Skip package if ignored in config
+			if rootDir == "/" && slices.Contains(MainBPMConfig.IgnorePackages, action.(*RemovePackageAction).BpmPackage.PkgInfo.Name) {
+				continue
+			}
+
+			dependants := action.(*RemovePackageAction).BpmPackage.PkgInfo.GetPackageDependants(rootDir, true)
+			packageDepndants[action.(*RemovePackageAction).BpmPackage.PkgInfo.Name] = dependants
+		}
+
+		// Remove dependant packages from map if they are to be removed by this operation
+		for pkg, required := range packageDepndants {
+			required = slices.DeleteFunc(required, func(pkgName string) bool {
+				_, ok := packageDepndants[pkgName]
+				return ok
+			})
+			packageDepndants[pkg] = required
+		}
+
+		// Remove dependant packages if ignored
+		for pkg, required := range packageDepndants {
+			required = slices.DeleteFunc(required, func(pkgName string) bool {
+				return rootDir == "/" && slices.Contains(MainBPMConfig.IgnorePackages, pkgName)
+			})
+			packageDepndants[pkg] = required
+		}
+
+		// Remove empty keys from map
+		maps.DeleteFunc(packageDepndants, func(pkg string, required []string) bool {
+			return len(required) == 0
+		})
+
+		// Return error
+		if len(packageDepndants) != 0 {
+			return nil, PackageRemovalDependencyErr{RequiredPackages: packageDepndants}
+		}
+	}
+
 	return operation, nil
 }
 
@@ -227,7 +267,7 @@ func CleanupPackages(cleanupMakeDepends bool, rootDir string) (operation *BPMOpe
 	operation = &BPMOperation{
 		Actions:           make([]OperationAction, 0),
 		UnresolvedDepends: make([]string, 0),
-		Changes:           make(map[string]string),
+		ModifiedFiles:     make(map[string]string),
 		RootDir:           rootDir,
 		compiledPackages:  make(map[string]string),
 	}
@@ -324,7 +364,7 @@ func CleanupCache(rootDir string, cleanupCompilationFiles, cleanupCompiledPackag
 }
 
 // UpdatePackages fetches the newest versions of all installed packages from
-func UpdatePackages(rootDir string, syncDatabase bool, installOptionalDependencies, forceInstallation, verbose bool) (operation *BPMOperation, err error) {
+func UpdatePackages(rootDir string, syncDatabase, allowDowngrades, forceInstallation, runChecks, verbose bool) (operation *BPMOperation, err error) {
 	// Sync databases
 	if syncDatabase {
 		err := SyncDatabase(verbose)
@@ -355,14 +395,16 @@ func UpdatePackages(rootDir string, syncDatabase bool, installOptionalDependenci
 	operation = &BPMOperation{
 		Actions:           make([]OperationAction, 0),
 		UnresolvedDepends: make([]string, 0),
-		Changes:           make(map[string]string),
+		ModifiedFiles:     make(map[string]string),
+		RunChecks:         runChecks,
 		RootDir:           rootDir,
 		compiledPackages:  make(map[string]string),
 	}
 
 	// Search for packages
+	pkgsNotFound := make([]string, 0)
 	for _, pkg := range pkgs {
-		if slices.Contains(MainBPMConfig.IgnorePackages, pkg) {
+		if rootDir == "/" && slices.Contains(MainBPMConfig.IgnorePackages, pkg) {
 			continue
 		}
 		var entry *BPMDatabaseEntry
@@ -377,31 +419,127 @@ func UpdatePackages(rootDir string, syncDatabase bool, installOptionalDependenci
 		if installedInfo == nil {
 			return nil, fmt.Errorf("could not get package info for package (%s)", pkg)
 		} else {
-			comparison := ComparePackageVersions(*entry.Info, *installedInfo)
-			if comparison > 0 {
-				operation.AppendAction(&FetchPackageAction{
-					InstallationReason: GetInstallationReason(pkg, rootDir),
+			comparison := CompareVersions(entry.Info.GetFullVersion(), installedInfo.GetFullVersion())
+			if (!allowDowngrades && comparison > 0) || (allowDowngrades && comparison != 0) {
+				operation.Actions = append(operation.Actions, &FetchPackageAction{
+					InstallationReason: GetPackage(pkg, rootDir).LocalInfo.GetInstallationReason(),
 					DatabaseEntry:      entry,
 				})
 			}
+
+			// Check for missing dependencies
+			for _, depend := range entry.Info.Depends {
+				// Split package name and required version
+				dependName, _, _ := SplitPkgNameAndVersion(depend)
+
+				if IsPackageInstalled(dependName, rootDir) && EvaluateDependency(depend, GetPackageInfo(dependName, rootDir).Version) {
+					continue
+				}
+				if len(GetVirtualPackageInfo(dependName, rootDir)) > 0 {
+					continue
+				}
+
+				// Find database entry for missing dependency
+				dependEntry, _, err := GetDatabaseEntry(dependName)
+				if err != nil {
+					providers := GetDatabaseVirtualPackageEntry(dependName)
+					if len(providers) == 0 {
+						pkgsNotFound = append(pkgsNotFound, depend)
+						continue
+					}
+
+					dependEntry = providers[0]
+				}
+
+				// Skip dependency if action already exists
+				if ActionSliceIndex(operation.Actions, dependEntry.Info.Name) != -1 {
+					continue
+				}
+
+				// Skip dependency if ignored in config
+				if rootDir == "/" && slices.Contains(MainBPMConfig.IgnorePackages, dependEntry.Info.Name) {
+					continue
+				}
+
+				// Ensure entry has required version
+				if !EvaluateDependency(depend, dependEntry.Info.Version) {
+					pkgsNotFound = append(pkgsNotFound, depend)
+					continue
+				}
+
+				// Fetch dependency
+				operation.Actions = append(operation.Actions, &FetchPackageAction{
+					InstallationReason: InstallationReasonDependency,
+					DatabaseEntry:      dependEntry,
+				})
+			}
+
+			// Check for missing runtime dependencies
+			for _, depend := range entry.Info.RuntimeDepends {
+				// Split package name and required version
+				dependName, _, _ := SplitPkgNameAndVersion(depend)
+
+				if IsPackageInstalled(dependName, rootDir) && EvaluateDependency(depend, GetPackageInfo(dependName, rootDir).Version) {
+					continue
+				}
+				if len(GetVirtualPackageInfo(dependName, rootDir)) > 0 {
+					continue
+				}
+
+				// Find database entry for missing dependency
+				dependEntry, _, err := GetDatabaseEntry(dependName)
+				if err != nil {
+					providers := GetDatabaseVirtualPackageEntry(dependName)
+					if len(providers) == 0 {
+						pkgsNotFound = append(pkgsNotFound, depend)
+						continue
+					}
+
+					dependEntry = providers[0]
+				}
+
+				// Skip dependency if ignored in config
+				if rootDir == "/" && slices.Contains(MainBPMConfig.IgnorePackages, dependEntry.Info.Name) {
+					continue
+				}
+
+				// Ensure entry has required version
+				if !EvaluateDependency(depend, dependEntry.Info.Version) {
+					pkgsNotFound = append(pkgsNotFound, depend)
+					continue
+				}
+
+				// Fetch dependency
+				operation.Actions = append(operation.Actions, &FetchPackageAction{
+					InstallationReason: InstallationReasonDependency,
+					DatabaseEntry:      dependEntry,
+				})
+			}
 		}
 	}
 
-	// Check for new dependencies in updated packages
-	err = operation.ResolveDependencies(false, installOptionalDependencies, verbose)
-	if err != nil {
-		return nil, fmt.Errorf("could not resolve dependencies: %s", err)
-	}
-	if len(operation.UnresolvedDepends) != 0 {
-		if !forceInstallation {
-			return nil, DependencyNotFoundErr{operation.UnresolvedDepends}
-		} else if verbose {
-			log.Printf("Warning: %s", DependencyNotFoundErr{operation.UnresolvedDepends})
-		}
+	// Return error if not all packages are found
+	if len(pkgsNotFound) != 0 {
+		return nil, PackageNotFoundErr{pkgsNotFound}
 	}
 
 	// Replace obsolete packages
 	operation.ReplaceObsoletePackages()
+
+	// Check for conflicts
+	conflicts := operation.CheckForConflicts()
+	if len(conflicts) > 0 {
+		err = fmt.Errorf("conflicts detected")
+		for pkg, conflict := range conflicts {
+			err = errors.Join(err, PackageConflictErr{pkg, conflict})
+		}
+		if !forceInstallation {
+			return nil, err
+		} else {
+			log.Printf("Warning: %s", err)
+		}
+	}
+
 	return operation, nil
 }
 

src/bpmlib/go.mod

@@ -1,8 +1,17 @@
-module git.enumerated.dev/bubble-package-manager/bpm/src/bpmlib
+module github.com/EnumeratedDev/bpm/src/bpmlib
 
-go 1.23
+go 1.24.0
 
 require (
+	github.com/drone/envsubst v1.0.3
 	github.com/knqyf263/go-rpm-version v0.0.0-20240918084003-2afd7dc6a38f
+	github.com/schollz/progressbar/v3 v3.18.0
 	gopkg.in/yaml.v3 v3.0.1
 )
+
+require (
+	github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db // indirect
+	github.com/rivo/uniseg v0.4.7 // indirect
+	golang.org/x/sys v0.37.0 // indirect
+	golang.org/x/term v0.36.0 // indirect
+)

src/bpmlib/go.sum

@@ -1,5 +1,29 @@
+github.com/chengxilo/virtualterm v1.0.4 h1:Z6IpERbRVlfB8WkOmtbHiDbBANU7cimRIof7mk9/PwM=
+github.com/chengxilo/virtualterm v1.0.4/go.mod h1:DyxxBZz/x1iqJjFxTFcr6/x+jSpqN0iwWCOK1q10rlY=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/drone/envsubst v1.0.3 h1:PCIBwNDYjs50AsLZPYdfhSATKaRg/FJmDc2D6+C2x8g=
+github.com/drone/envsubst v1.0.3/go.mod h1:N2jZmlMufstn1KEqvbHjw40h1KyTmnVzHcSc9bFiJ2g=
+github.com/google/go-cmp v0.2.0 h1:+dTQ8DZQJz0Mb/HjFlkptS1FeQ4cWSnN941F8aEG4SQ=
+github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/knqyf263/go-rpm-version v0.0.0-20240918084003-2afd7dc6a38f h1:xt29M2T6STgldg+WEP51gGePQCsQvklmP2eIhPIBK3g=
 github.com/knqyf263/go-rpm-version v0.0.0-20240918084003-2afd7dc6a38f/go.mod h1:i4sF0l1fFnY1aiw08QQSwVAFxHEm311Me3WsU/X7nL0=
+github.com/mattn/go-runewidth v0.0.16 h1:E5ScNMtiwvlvB5paMFdw9p4kSQzbXFikJ5SQO6TULQc=
+github.com/mattn/go-runewidth v0.0.16/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
+github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db h1:62I3jR2EmQ4l5rM/4FEfDWcRD+abF5XlKShorW5LRoQ=
+github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db/go.mod h1:l0dey0ia/Uv7NcFFVbCLtqEBQbrT4OCwCSKTEv6enCw=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
+github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
+github.com/schollz/progressbar/v3 v3.18.0 h1:uXdoHABRFmNIjUfte/Ex7WtuyVslrw2wVPQmCN62HpA=
+github.com/schollz/progressbar/v3 v3.18.0/go.mod h1:IsO3lpbaGuzh8zIMzgY3+J8l4C8GjO0Y9S69eFvNsec=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+golang.org/x/sys v0.37.0 h1:fdNQudmxPjkdUTPnLn5mdQv7Zwvbvpaxqs831goi9kQ=
+golang.org/x/sys v0.37.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/term v0.36.0 h1:zMPR+aF8gfksFprF/Nc/rd1wRS1EI6nDBGyWAvDzx2Q=
+golang.org/x/term v0.36.0/go.mod h1:Qu394IJq6V6dCBRgwqshf3mPF85AqzYEzofzRdZkWss=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

src/bpmlib/gpg.go

@@ -0,0 +1,216 @@
+package bpmlib
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"os/exec"
+	"path"
+	"strings"
+)
+
+func InitializeKeyring(rootDir string) error {
+	gpgHomedir := path.Join(rootDir, "/var/lib/bpm/gpg")
+
+	// Create GPG directory
+	err := os.Mkdir(gpgHomedir, 0700)
+	if err != nil && !os.IsExist(err) {
+		return err
+	}
+
+	// Get number of secret keys
+	cmd := exec.Command("gpg", "--homedir="+gpgHomedir, "--list-secret-keys", "--with-colons")
+	output, err := cmd.Output()
+	if err != nil {
+		return err
+	}
+	secretKeysLineCount := len(strings.Split(strings.TrimSpace(string(output)), "\n"))
+
+	// Create signing key
+	if secretKeysLineCount <= 1 {
+		cmd := exec.Command("gpg", "--homedir="+gpgHomedir, "--batch", "--gen-key")
+		cmd.Stdout = os.Stdout
+		cmd.Stderr = os.Stderr
+		cmd.Stdin = strings.NewReader(`%echo Creating signing key...
+Key-Type: RSA
+Key-Length: 4096
+Key-Usage: sign
+Name-Real: BPM signing key
+Name-Email: bpm@localhost
+Expire-Date: 0
+%no-protection
+%commit
+%echo Done`)
+
+		err = cmd.Run()
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func IsKeyringInitialized(rootDir string) bool {
+	gpgHomedir := path.Join(rootDir, "/var/lib/bpm/gpg")
+
+	// Check if gpg directory exists
+	if stat, err := os.Stat(gpgHomedir); err != nil || !stat.IsDir() {
+		return false
+	}
+
+	// Get number of secret keys
+	cmd := exec.Command("gpg", "--homedir="+gpgHomedir, "--list-secret-keys", "--with-colons")
+	output, err := cmd.Output()
+	if err != nil {
+		return false
+	}
+	secretKeysLineCount := len(strings.Split(strings.TrimSpace(string(output)), "\n"))
+
+	// Return false if no signing key has been created
+	if secretKeysLineCount <= 1 {
+		return false
+	}
+
+	return true
+}
+
+func PopulateKeyring(rootDir string) error {
+	gpgHomedir := path.Join(rootDir, "/var/lib/bpm/gpg")
+	keyringsDir := path.Join(rootDir, "/var/lib/bpm/keyrings")
+
+	dirEntries, err := os.ReadDir(keyringsDir)
+	if err != nil && !os.IsNotExist(err) {
+		return err
+	}
+
+	// Remove removed keys
+	for _, entry := range dirEntries {
+		if entry.IsDir() {
+			continue
+		}
+		if !strings.HasSuffix(entry.Name(), ".revoked") {
+			continue
+		}
+
+		data, err := os.ReadFile(path.Join(keyringsDir, entry.Name()))
+		if err != nil {
+			return err
+		}
+
+		// Loop over all key IDs
+		for entry := range strings.SplitSeq(strings.TrimSpace(string(data)), "\n") {
+			// Ensure key ID exists
+			err := exec.Command("gpg", "--homedir="+gpgHomedir, "--list-keys", entry).Run()
+			if err != nil {
+				continue
+			}
+
+			cmd := exec.Command("gpg", "--homedir="+gpgHomedir, "--batch", "--yes", "--delete-secret-and-public-keys", entry)
+
+			err = cmd.Run()
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	// Import all keyrings
+	for _, entry := range dirEntries {
+		if entry.IsDir() {
+			continue
+		}
+		if !strings.HasSuffix(entry.Name(), ".pgp") && !strings.HasSuffix(entry.Name(), ".asc") {
+			continue
+		}
+
+		cmd := exec.Command("gpg", "--homedir="+gpgHomedir, "--import", path.Join(keyringsDir, entry.Name()))
+
+		err := cmd.Run()
+		if err != nil {
+			return err
+		}
+	}
+
+	// Trust keys
+	for _, entry := range dirEntries {
+		if entry.IsDir() {
+			continue
+		}
+		if !strings.HasSuffix(entry.Name(), ".trustdb") {
+			continue
+		}
+
+		data, err := os.ReadFile(path.Join(keyringsDir, entry.Name()))
+		if err != nil {
+			return err
+		}
+
+		// Loop over all key IDs
+		for entry := range strings.SplitSeq(strings.TrimSpace(string(data)), "\n") {
+			keyID := strings.Split(entry, ":")[0]
+
+			// Ensure key ID exists
+			err := exec.Command("gpg", "--homedir="+gpgHomedir, "--list-keys", keyID).Run()
+			if err != nil {
+				continue
+			}
+
+			// Sign key
+			cmd := exec.Command("gpg", "--homedir="+gpgHomedir, "--command-fd=0", "--batch", "--lsign-key", keyID)
+			cmd.Stdin = strings.NewReader("y\ny\n")
+
+			err = cmd.Run()
+			if err != nil {
+				return err
+			}
+		}
+
+		// Import owner trust database
+		cmd := exec.Command("gpg", "--homedir="+gpgHomedir, "--import-ownertrust", path.Join(keyringsDir, entry.Name()))
+
+		err = cmd.Run()
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func VerifySignature(filename, signature string, requireTrusted bool, rootDir string) error {
+	gpgHomedir := path.Join(rootDir, "/var/lib/bpm/gpg")
+
+	if _, err := os.Stat(gpgHomedir); err != nil {
+		return err
+	}
+
+	cmd := exec.Command("gpg", "--homedir="+gpgHomedir, "--status-fd=3", "--verify", signature, filename)
+	pipeReader, pipeWriter, err := os.Pipe()
+	if err != nil {
+		return err
+	}
+	defer pipeReader.Close()
+	defer pipeWriter.Close()
+	cmd.ExtraFiles = append(cmd.ExtraFiles, pipeWriter)
+
+	err = cmd.Run()
+	if err != nil {
+		return err
+	}
+	pipeWriter.Close()
+
+	if requireTrusted {
+		data, err := io.ReadAll(pipeReader)
+		if err != nil {
+			return err
+		}
+
+		dataStr := string(data)
+		if !strings.Contains(dataStr, "[GNUPG:] TRUST_FULLY") && !strings.Contains(dataStr, "[GNUPG:] TRUST_ULTIMATE") {
+			return fmt.Errorf("signature verified but not trusted")
+		}
+	}
+
+	return err
+}

src/bpmlib/hooks.go

@@ -1,26 +1,27 @@
 package bpmlib
 
 import (
+	"bytes"
 	"errors"
 	"fmt"
-	"gopkg.in/yaml.v3"
 	"os"
 	"os/exec"
-	"path"
 	"path/filepath"
 	"slices"
 	"strings"
 	"syscall"
+
+	"gopkg.in/yaml.v3"
 )
 
 type BPMHook struct {
-	SourcePath        string
-	SourceContent     string
-	TriggerOperations []string `yaml:"trigger_operations"`
-	TargetType        string   `yaml:"target_type"`
-	Targets           []string `yaml:"targets"`
-	Depends           []string `yaml:"depends"`
-	Run               string   `yaml:"run"`
+	SourcePath          string
+	SourceContent       string
+	TriggerActions      []string `yaml:"trigger_actions"`
+	TriggerPreOperation bool     `yaml:"trigger_pre_operation"`
+	Targets             []string `yaml:"targets"`
+	Run                 string   `yaml:"run"`
+	PassTargets         bool     `yaml:"pass_targets"`
 }
 
 // createHook returns a BPMHook instance based on the content of the given string
@@ -33,13 +34,11 @@ func createHook(sourcePath string) (*BPMHook, error) {
 
 	// Create base hook structure
 	hook := &BPMHook{
-		SourcePath:        sourcePath,
-		SourceContent:     string(bytes),
-		TriggerOperations: nil,
-		TargetType:        "",
-		Targets:           nil,
-		Depends:           nil,
-		Run:               "",
+		SourcePath:     sourcePath,
+		SourceContent:  string(bytes),
+		TriggerActions: nil,
+		Targets:        nil,
+		Run:            "",
 	}
 
 	// Unmarshal yaml string
@@ -61,19 +60,15 @@ func (hook *BPMHook) IsValid() error {
 	ValidOperations := []string{"install", "upgrade", "remove"}
 
 	// Return error if any trigger operation is not valid or none are given
-	if len(hook.TriggerOperations) == 0 {
+	if len(hook.TriggerActions) == 0 {
 		return errors.New("no trigger operations specified")
 	}
-	for _, operation := range hook.TriggerOperations {
+	for _, operation := range hook.TriggerActions {
 		if !slices.Contains(ValidOperations, operation) {
 			return errors.New("trigger operation '" + operation + "' is not valid")
 		}
 	}
 
-	if hook.TargetType != "package" && hook.TargetType != "path" {
-		return errors.New("target type '" + hook.TargetType + "' is not valid")
-	}
-
 	if len(hook.Run) == 0 {
 		return errors.New("command to run is empty")
 	}
@@ -83,55 +78,30 @@ func (hook *BPMHook) IsValid() error {
 }
 
 // Execute hook if all conditions are met
-func (hook *BPMHook) Execute(packageChanges map[string]string, verbose bool, rootDir string) error {
-	// Check if package dependencies are met
-	installedPackages, err := GetInstalledPackages(rootDir)
-	if err != nil {
-		return err
-	}
-
-	for _, depend := range hook.Depends {
-		if !slices.Contains(installedPackages, depend) {
-			return nil
-		}
-	}
-
-	// Get modified files slice
-	modifiedFiles := make([]*PackageFileEntry, 0)
-	for pkg := range packageChanges {
-		if GetPackage(pkg, rootDir) != nil {
-			modifiedFiles = append(modifiedFiles, GetPackage(pkg, rootDir).PkgFiles...)
-		}
-
-	}
-
+func (hook *BPMHook) Execute(modifiedFiles map[string]string, preOperation bool, verbose bool, rootDir string) error {
 	// Check if any targets are met
-	targetMet := false
+	targetsMet := make([]string, 0)
 	for _, target := range hook.Targets {
-		if targetMet {
-			break
-		}
-		if hook.TargetType == "package" {
-			for change, operation := range packageChanges {
-				if target == change && slices.Contains(hook.TriggerOperations, operation) {
-					targetMet = true
-					break
-				}
+		for modifiedFile, action := range modifiedFiles {
+			// Check if this hook is triggered by this file's action
+			if !slices.Contains(hook.TriggerActions, action) {
+				continue
 			}
-		} else {
-			glob, err := filepath.Glob(path.Join(rootDir, target))
-			if err != nil {
-				return err
+
+			// Check if file has already been checked
+			if slices.Contains(targetsMet, modifiedFile) {
+				continue
 			}
-			for _, change := range modifiedFiles {
-				if slices.Contains(glob, path.Join(rootDir, change.Path)) {
-					targetMet = true
-					break
-				}
+
+			if matched, _ := filepath.Match(target, modifiedFile); !matched {
+				continue
 			}
+
+			targetsMet = append(targetsMet, modifiedFile)
 		}
 	}
-	if !targetMet {
+
+	if len(targetsMet) == 0 {
 		return nil
 	}
 
@@ -140,16 +110,25 @@ func (hook *BPMHook) Execute(packageChanges map[string]string, verbose bool, roo
 	cmd := exec.Command(splitCommand[0], splitCommand[1:]...)
 	// Setup subprocess environment
 	cmd.Dir = "/"
+	// Pass targets
+	if hook.PassTargets {
+		buffer := bytes.Buffer{}
+		buffer.WriteString(strings.Join(targetsMet, "\n") + "\n")
+
+		cmd.Stdin = &buffer
+	}
 	// Run hook in chroot if using the -R flag
 	if rootDir != "/" {
 		cmd.SysProcAttr = &syscall.SysProcAttr{Chroot: rootDir}
 	}
 
-	if verbose {
-		fmt.Printf("Running hook (%s) with run command: %s\n", hook.SourcePath, strings.Join(splitCommand, " "))
+	if !verbose {
+		fmt.Printf("Running hook (%s)\n", filepath.Base(hook.SourcePath))
+	} else {
+		fmt.Printf("Running hook (%s) with run command: %s\n", filepath.Base(hook.SourcePath), strings.Join(splitCommand, " "))
 	}
 
-	err = cmd.Run()
+	err := cmd.Run()
 	if err != nil {
 		return err
 	}

src/bpmlib/installed_packages.go

@@ -1,32 +1,54 @@
 package bpmlib
 
 import (
-	"errors"
 	"fmt"
 	"os"
 	"path"
+	"path/filepath"
 	"slices"
 	"strconv"
 	"strings"
+
+	"gopkg.in/yaml.v3"
 )
 
-var localPackageInformation map[string]map[string]*BPMPackage = make(map[string]map[string]*BPMPackage)
+var persistentDataVersion int = 1
 
-func initializeLocalPackageInformation(rootDir string) (err error) {
+var localPackageInformation map[string]map[string]*PackageInfo = make(map[string]map[string]*PackageInfo)
+var installedVirtualPackages map[string]map[string][]*PackageInfo = make(map[string]map[string][]*PackageInfo)
+
+func InitializeLocalPackageInformation(rootDir string) (err error) {
 	// Return if information is already initialized
 	if _, ok := localPackageInformation[rootDir]; ok {
 		return nil
 	}
 
-	tempPackageInformation := make(map[string]*BPMPackage)
+	tempPackageInformation := make(map[string]*PackageInfo)
+	tempInstalledVirtualPackages := make(map[string][]*PackageInfo)
 
-	// Get path to installed package information directory
-	installedDir := path.Join(rootDir, "var/lib/bpm/installed/")
+	// Get paths
+	persistentDataDir := path.Join(rootDir, "var/lib/bpm")
+	installedDir := path.Join(persistentDataDir, "installed")
+
+	// Ensure persistent data directory is up-to-date
+	if _, err := os.Stat(persistentDataDir); err == nil {
+		data, err := os.ReadFile(path.Join(persistentDataDir, ".version"))
+		if err != nil {
+			return fmt.Errorf("persistent data is not up-to-date! Please run 'bpm upgrade-persistent-data' first")
+		}
+		currentPersistentDataVersion, err := strconv.Atoi(strings.TrimSpace(string(data)))
+		if err != nil {
+			return fmt.Errorf("persistent data is not up-to-date! Please run 'bpm upgrade-persistent-data' first")
+		}
+		if currentPersistentDataVersion != persistentDataVersion {
+			return fmt.Errorf("persistent data is not up-to-date! Please run 'bpm upgrade-persistent-data' first")
+		}
+	}
 
 	// Get directory content
 	items, err := os.ReadDir(installedDir)
 	if os.IsNotExist(err) {
-		localPackageInformation[rootDir] = make(map[string]*BPMPackage)
+		localPackageInformation[rootDir] = make(map[string]*PackageInfo)
 		return nil
 	}
 	if err != nil {
@@ -50,30 +72,68 @@ func initializeLocalPackageInformation(rootDir string) (err error) {
 			return err
 		}
 
-		// Read package files
-		files := getPackageFiles(info.Name, rootDir)
-
 		// Add package to slice
-		tempPackageInformation[info.Name] = &BPMPackage{
-			PkgInfo:  info,
-			PkgFiles: files,
+		tempPackageInformation[info.Name] = info
+
+		// Add virtual packages
+		for _, vpkg := range info.Provides {
+			tempInstalledVirtualPackages[vpkg] = append(tempInstalledVirtualPackages[vpkg], info)
 		}
 	}
 
 	localPackageInformation[rootDir] = tempPackageInformation
+	installedVirtualPackages[rootDir] = tempInstalledVirtualPackages
 	return nil
 }
 
 func GetInstalledPackages(rootDir string) (ret []string, err error) {
 	// Initialize local package information
-	err = initializeLocalPackageInformation(rootDir)
+	err = InitializeLocalPackageInformation(rootDir)
 	if err != nil {
 		return nil, err
 	}
 
 	// Loop through each package and add it to slice
-	for _, bpmpkg := range localPackageInformation[rootDir] {
-		ret = append(ret, bpmpkg.PkgInfo.Name)
+	for _, pkgInfo := range localPackageInformation[rootDir] {
+		ret = append(ret, pkgInfo.Name)
+	}
+
+	// Sort packages
+	slices.Sort(ret)
+
+	return ret, nil
+}
+
+func GetPathOwners(path, rootDir string) (ret []string, err error) {
+	// Get absolte path to path
+	path, err = filepath.Abs(path)
+	if err != nil {
+		return
+	}
+
+	path, err = filepath.Rel(rootDir, path)
+	if err != nil {
+		return
+	}
+
+	// Trim leading and trailing slashes
+	path = strings.TrimLeft(path, "/")
+	path = strings.TrimRight(path, "/")
+
+	// Get installed packages
+	pkgs, err := GetInstalledPackages(rootDir)
+	if err != nil {
+		return
+	}
+
+	// Add packages that own path to list
+	for _, pkg := range pkgs {
+		pkgFiles := getPackageFiles(pkg, rootDir)
+		if slices.ContainsFunc(pkgFiles, func(entry *PackageFileEntry) bool {
+			return entry.Path == path
+		}) {
+			ret = append(ret, pkg)
+		}
 	}
 
 	return ret, nil
@@ -81,7 +141,7 @@ func GetInstalledPackages(rootDir string) (ret []string, err error) {
 
 func IsPackageInstalled(pkg, rootDir string) bool {
 	// Initialize local package information
-	err := initializeLocalPackageInformation(rootDir)
+	err := InitializeLocalPackageInformation(rootDir)
 	if err != nil {
 		return false
 	}
@@ -92,67 +152,43 @@ func IsPackageInstalled(pkg, rootDir string) bool {
 	return true
 }
 
-func GetPackageInfo(pkg string, rootDir string) *PackageInfo {
-	// Get BPM package
-	bpmpkg := GetPackage(pkg, rootDir)
-
-	// Return nil if not found
-	if bpmpkg == nil {
+func GetVirtualPackageInfo(vpkg, rootDir string) []*PackageInfo {
+	err := InitializeLocalPackageInformation(rootDir)
+	if err != nil {
 		return nil
 	}
 
-	return bpmpkg.PkgInfo
+	providers := installedVirtualPackages[rootDir][vpkg]
+	slices.SortFunc(providers, func(a, b *PackageInfo) int {
+		return strings.Compare(a.Name, b.Name)
+	})
+
+	return providers
 }
 
-func IsVirtualPackage(pkg, rootDir string) (bool, string) {
-	pkgs, err := GetInstalledPackages(rootDir)
+func GetPackageInfo(pkg string, rootDir string) *PackageInfo {
+	err := InitializeLocalPackageInformation(rootDir)
 	if err != nil {
-		return false, ""
+		return nil
 	}
-	for _, p := range pkgs {
-		if p == pkg {
-			return false, ""
-		}
-		i := GetPackageInfo(p, rootDir)
-		if i == nil {
-			continue
-		}
-		if slices.Contains(i.Provides, pkg) {
-			return true, p
-		}
-	}
-	return false, ""
-}
 
-func IsPackageProvided(pkg, rootDir string) bool {
-	pkgs, err := GetInstalledPackages(rootDir)
-	if err != nil {
-		return false
-	}
-	for _, p := range pkgs {
-		if p == pkg {
-			return true
-		}
-		i := GetPackageInfo(p, rootDir)
-		if i == nil {
-			continue
-		}
-		if slices.Contains(i.Provides, pkg) {
-			return true
-		}
-	}
-	return false
+	return localPackageInformation[rootDir][pkg]
 }
 
 func GetPackage(pkg, rootDir string) *BPMPackage {
-	err := initializeLocalPackageInformation(rootDir)
-	if err != nil {
+	pkgInfo := GetPackageInfo(pkg, rootDir)
+	if pkgInfo == nil {
 		return nil
 	}
 
-	bpmpkg := localPackageInformation[rootDir][pkg]
+	files := getPackageFiles(pkgInfo.Name, rootDir)
+	localInfo := getPackageLocalInfo(pkgInfo.Name, rootDir)
 
-	return bpmpkg
+	return &BPMPackage{
+		PkgInfo:   pkgInfo,
+		PkgFiles:  files,
+		LocalInfo: localInfo,
+	}
 }
 
 func GetAllPackageFiles(rootDir string, excludePackages ...string) (map[string][]*BPMPackage, error) {
@@ -169,14 +205,11 @@ func GetAllPackageFiles(rootDir string, excludePackages ...string) (map[string][
 		}
 		bpmpkg := GetPackage(pkgName, rootDir)
 		if bpmpkg == nil {
-			return nil, errors.New(fmt.Sprintf("could not get BPM package (%s)", pkgName))
+			return nil, fmt.Errorf("could not get BPM package (%s)", pkgName)
 		}
 		for _, entry := range bpmpkg.PkgFiles {
-			if _, ok := ret[entry.Path]; ok {
-				ret[entry.Path] = append(ret[entry.Path], bpmpkg)
-			} else {
-				ret[entry.Path] = []*BPMPackage{bpmpkg}
-			}
+			ret[entry.Path] = append(ret[entry.Path], bpmpkg)
+
 		}
 	}
 
@@ -226,7 +259,7 @@ func getPackageFiles(pkg, rootDir string) []*PackageFileEntry {
 		if err != nil {
 			return nil
 		}
-		size, err := strconv.ParseUint(stringEntry[len(stringEntry)-1], 0, 64)
+		size, err := strconv.ParseInt(stringEntry[len(stringEntry)-1], 0, 64)
 		if err != nil {
 			return nil
 		}
@@ -241,3 +274,127 @@ func getPackageFiles(pkg, rootDir string) []*PackageFileEntry {
 
 	return pkgFiles
 }
+
+func getPackageLocalInfo(pkg, rootDir string) PackageLocalInfo {
+	localInfo := PackageLocalInfo{}
+
+	installedDir := path.Join(rootDir, "var/lib/bpm/installed/")
+	pkgDir := path.Join(installedDir, pkg)
+	localInfoFile := path.Join(path.Join(pkgDir, "local"))
+
+	if _, err := os.Stat(localInfoFile); os.IsNotExist(err) {
+		return localInfo
+	}
+
+	file, err := os.Open(localInfoFile)
+	if err != nil {
+		return localInfo
+	}
+	defer file.Close()
+
+	err = yaml.NewDecoder(file).Decode(&localInfo)
+	if err != nil {
+		return localInfo
+	}
+
+	return localInfo
+}
+
+func SetPackageLocalInfo(pkg string, localInfo PackageLocalInfo, rootDir string) error {
+	installedDir := path.Join(rootDir, "var/lib/bpm/installed/")
+	pkgDir := path.Join(installedDir, pkg)
+
+	localFile, err := os.OpenFile(path.Join(pkgDir, "local"), os.O_WRONLY|os.O_CREATE, 0644)
+	if err != nil {
+		return err
+	}
+	defer localFile.Close()
+
+	err = yaml.NewEncoder(localFile).Encode(localInfo)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func UpgradePersistentData(rootDir string) error {
+	persistentDataDir := path.Join(rootDir, "var/lib/bpm")
+
+	// Create persistent data directory
+	os.MkdirAll(persistentDataDir, 0755)
+
+	// Upgrade installed package directories
+	dirEntries, err := os.ReadDir(path.Join(persistentDataDir, "installed"))
+	if err != nil && !os.IsNotExist(err) {
+		return err
+	} else if err == nil {
+		for _, entry := range dirEntries {
+			pkgDir := path.Join(persistentDataDir, "installed", entry.Name())
+
+			// Generate default local package information file
+			if _, err := os.Stat(path.Join(pkgDir, "local")); err != nil && !os.IsNotExist(err) {
+				return err
+			} else if os.IsNotExist(err) {
+				fmt.Printf("Generating local package information for package (%s)\n", entry.Name())
+
+				out, err := yaml.Marshal(PackageLocalInfo{
+					InstallationReason: "unknown",
+					InstalledOn:        0,
+					LastUpdatedOn:      0,
+				})
+				if err != nil {
+					return err
+				}
+
+				err = os.WriteFile(path.Join(pkgDir, "local"), out, 0644)
+				if err != nil {
+					return err
+				}
+			}
+
+			// Move installation reason to local package information file
+			if installationReason, err := os.ReadFile(path.Join(pkgDir, "installation_reason")); err != nil && !os.IsNotExist(err) {
+				return err
+			} else if err == nil {
+				fmt.Printf("Moving installation reason to local package information for package (%s)\n", entry.Name())
+
+				data, err := os.ReadFile(path.Join(pkgDir, "local"))
+				if err != nil {
+					return err
+				}
+
+				localInfo := &PackageLocalInfo{}
+				err = yaml.Unmarshal(data, localInfo)
+				if err != nil {
+					return err
+				}
+
+				localInfo.InstallationReason = strings.TrimSpace(string(installationReason))
+
+				out, err := yaml.Marshal(localInfo)
+				if err != nil {
+					return err
+				}
+
+				err = os.WriteFile(path.Join(pkgDir, "local"), out, 0644)
+				if err != nil {
+					return err
+				}
+
+				err = os.Remove(path.Join(pkgDir, "installation_reason"))
+				if err != nil {
+					return err
+				}
+			}
+		}
+	}
+
+	// Set persistent data version number
+	err = os.WriteFile(path.Join(persistentDataDir, ".version"), []byte(strconv.Itoa(persistentDataVersion)), 0644)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}

src/bpmlib/net.go

@@ -0,0 +1,58 @@
+package bpmlib
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"path"
+	"strings"
+)
+
+func downloadFile(barText, u, filepath string, perm os.FileMode) error {
+	if strings.HasSuffix(filepath, "/") {
+		return fmt.Errorf("Filepath must not end in '/'")
+	}
+
+	req, err := http.NewRequest("GET", u, nil)
+	if err != nil {
+		return err
+	}
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+
+	// Create parent directories
+	err = os.MkdirAll(path.Dir(filepath), 0755)
+	if err != nil {
+		return err
+	}
+
+	// Create file
+	file, err := os.Create(filepath)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	// Create progress bar
+	bar := createProgressBar(resp.ContentLength, barText, barText == "")
+	defer bar.Close()
+
+	// Copy data
+	_, err = io.Copy(io.MultiWriter(file, bar), resp.Body)
+	if err != nil {
+		return err
+	}
+
+	// Set file permissions
+	err = file.Chmod(perm)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}

src/bpmlib/operations.go

@@ -8,84 +8,23 @@ import (
 	"path"
 	"slices"
 	"strings"
+	"text/tabwriter"
 )
 
 type BPMOperation struct {
 	Actions           []OperationAction
 	UnresolvedDepends []string
-	Changes           map[string]string
+	ModifiedFiles     map[string]string
+	CompilationJobs   int
+	RunChecks         bool
 	RootDir           string
-	compiledPackages  map[string]string
+
+	compiledPackages   map[string]string
+	hasFetchedPackages bool
 }
 
-func (operation *BPMOperation) ActionsContainPackage(pkg string) bool {
-	for _, action := range operation.Actions {
-		if action.GetActionType() == "install" {
-			if action.(*InstallPackageAction).BpmPackage.PkgInfo.Name == pkg {
-				return true
-			}
-		} else if action.GetActionType() == "fetch" {
-			if action.(*FetchPackageAction).DatabaseEntry.Info.Name == pkg {
-				return true
-			}
-		} else if action.GetActionType() == "remove" {
-			if action.(*RemovePackageAction).BpmPackage.PkgInfo.Name == pkg {
-				return true
-			}
-		}
-	}
-	return false
-}
-
-func (operation *BPMOperation) AppendAction(action OperationAction) {
-	operation.InsertActionAt(len(operation.Actions), action)
-}
-
-func (operation *BPMOperation) InsertActionAt(index int, action OperationAction) {
-	if len(operation.Actions) == index { // nil or empty slice or after last element
-		operation.Actions = append(operation.Actions, action)
-	} else {
-		operation.Actions = append(operation.Actions[:index+1], operation.Actions[index:]...) // index < len(a)
-		operation.Actions[index] = action
-	}
-
-	if action.GetActionType() == "install" {
-		pkgInfo := action.(*InstallPackageAction).BpmPackage.PkgInfo
-		if !IsPackageInstalled(pkgInfo.Name, operation.RootDir) {
-			operation.Changes[pkgInfo.Name] = "install"
-		} else {
-			operation.Changes[pkgInfo.Name] = "upgrade"
-		}
-	} else if action.GetActionType() == "fetch" {
-		pkgInfo := action.(*FetchPackageAction).DatabaseEntry.Info
-		if !IsPackageInstalled(pkgInfo.Name, operation.RootDir) {
-			operation.Changes[pkgInfo.Name] = "install"
-		} else {
-			operation.Changes[pkgInfo.Name] = "upgrade"
-		}
-	} else if action.GetActionType() == "remove" {
-		operation.Changes[action.(*RemovePackageAction).BpmPackage.PkgInfo.Name] = "remove"
-	}
-}
-
-func (operation *BPMOperation) RemoveAction(pkg, actionType string) {
-	operation.Actions = slices.DeleteFunc(operation.Actions, func(a OperationAction) bool {
-		if a.GetActionType() != actionType {
-			return false
-		}
-		if a.GetActionType() == "install" {
-			return a.(*InstallPackageAction).BpmPackage.PkgInfo.Name == pkg
-		} else if a.GetActionType() == "fetch" {
-			return a.(*FetchPackageAction).DatabaseEntry.Info.Name == pkg
-		} else if a.GetActionType() == "remove" {
-			return a.(*RemovePackageAction).BpmPackage.PkgInfo.Name == pkg
-		}
-		return false
-	})
-}
-
-func (operation *BPMOperation) GetTotalDownloadSize() uint64 {
-	var ret uint64 = 0
+func (operation *BPMOperation) GetTotalDownloadSize() int64 {
+	var ret int64 = 0
 	for _, action := range operation.Actions {
 		if action.GetActionType() == "fetch" {
 			ret += action.(*FetchPackageAction).DatabaseEntry.DownloadSize
@@ -94,8 +33,8 @@ func (operation *BPMOperation) GetTotalDownloadSize() uint64 {
 	return ret
 }
 
-func (operation *BPMOperation) GetTotalInstalledSize() uint64 {
-	var ret uint64 = 0
+func (operation *BPMOperation) GetTotalInstalledSize() int64 {
+	var ret int64 = 0
 	for _, action := range operation.Actions {
 		if action.GetActionType() == "install" {
 			ret += action.(*InstallPackageAction).BpmPackage.GetInstalledSize()
@@ -110,21 +49,25 @@ func (operation *BPMOperation) GetFinalActionSize(rootDir string) int64 {
 	var ret int64 = 0
 	for _, action := range operation.Actions {
 		if action.GetActionType() == "install" {
-			ret += int64(action.(*InstallPackageAction).BpmPackage.GetInstalledSize())
+			ret += action.(*InstallPackageAction).BpmPackage.GetInstalledSize()
 			if IsPackageInstalled(action.(*InstallPackageAction).BpmPackage.PkgInfo.Name, rootDir) {
-				ret -= int64(GetPackage(action.(*InstallPackageAction).BpmPackage.PkgInfo.Name, rootDir).GetInstalledSize())
+				ret -= GetPackage(action.(*InstallPackageAction).BpmPackage.PkgInfo.Name, rootDir).GetInstalledSize()
 			}
 		} else if action.GetActionType() == "fetch" {
-			ret += int64(action.(*FetchPackageAction).DatabaseEntry.InstalledSize)
+			ret += action.(*FetchPackageAction).DatabaseEntry.InstalledSize
+			if IsPackageInstalled(action.(*FetchPackageAction).DatabaseEntry.Info.Name, rootDir) {
+				ret -= action.(*FetchPackageAction).DatabaseEntry.InstalledSize
+			}
 		} else if action.GetActionType() == "remove" {
-			ret -= int64(action.(*RemovePackageAction).BpmPackage.GetInstalledSize())
+			ret -= action.(*RemovePackageAction).BpmPackage.GetInstalledSize()
 		}
 	}
 	return ret
 }
 
-func (operation *BPMOperation) ResolveDependencies(reinstallDependencies, installOptionalDependencies, verbose bool) error {
-	pos := 0
+func (operation *BPMOperation) ResolveDependencies(installRuntimeDepends bool) {
+	// Discover resolved virtual packages
+	resolvedVirtualPackages := make(map[string]string)
 	for _, value := range slices.Clone(operation.Actions) {
 		var pkgInfo *PackageInfo
 		if value.GetActionType() == "install" {
@@ -134,61 +77,63 @@ func (operation *BPMOperation) ResolveDependencies(reinstallDependencies, instal
 			action := value.(*FetchPackageAction)
 			pkgInfo = action.DatabaseEntry.Info
 		} else {
-			pos++
 			continue
 		}
 
-		resolved, unresolved := ResolveAllPackageDependenciesFromDatabases(pkgInfo, pkgInfo.Type == "source", installOptionalDependencies, !reinstallDependencies, verbose, operation.RootDir)
+		for _, vpkg := range pkgInfo.Provides {
+			if _, ok := resolvedVirtualPackages[vpkg]; !ok {
+				resolvedVirtualPackages[vpkg] = pkgInfo.Name
+			}
+		}
+	}
 
+	// Discover all dependencies
+	newActions := make([]OperationAction, 0)
+	for _, value := range operation.Actions {
+		var pkgInfo *PackageInfo
+		if value.GetActionType() == "install" {
+			action := value.(*InstallPackageAction)
+			pkgInfo = action.BpmPackage.PkgInfo
+		} else if value.GetActionType() == "fetch" {
+			action := value.(*FetchPackageAction)
+			pkgInfo = action.DatabaseEntry.Info
+		} else {
+			continue
+		}
+
+		resolved, unresolved := ResolveDependencies(pkgInfo, resolvedVirtualPackages, installRuntimeDepends, operation.RootDir)
+
+		// Append unresolved dependencies
 		operation.UnresolvedDepends = append(operation.UnresolvedDepends, unresolved...)
+		operation.UnresolvedDepends = removeDuplicates(operation.UnresolvedDepends)
 
 		for _, resolvedPkg := range resolved {
-			if !operation.ActionsContainPackage(resolvedPkg.PkgName) && resolvedPkg.PkgName != pkgInfo.Name {
-				if !reinstallDependencies && IsPackageInstalled(resolvedPkg.PkgName, operation.RootDir) {
-					continue
-				}
-				entry, _, err := GetDatabaseEntry(resolvedPkg.PkgName)
-				if err != nil {
-					return errors.New("could not get database entry for package (" + resolvedPkg.PkgName + ")")
-				}
-				operation.InsertActionAt(pos, &FetchPackageAction{
+			if ActionSliceIndex(newActions, resolvedPkg.DatabaseEntry.Info.Name) == -1 { // Dependency not in actions slice
+				var action OperationAction = &FetchPackageAction{
 					InstallationReason: resolvedPkg.InstallationReason,
-					DatabaseEntry:      entry,
-				})
-				pos++
+					DatabaseEntry:      resolvedPkg.DatabaseEntry,
+				}
+				newActions = append(newActions, action)
+
+				for _, vpkg := range resolvedPkg.DatabaseEntry.Info.Provides {
+					if _, ok := resolvedVirtualPackages[vpkg]; !ok {
+						resolvedVirtualPackages[vpkg] = resolvedPkg.DatabaseEntry.Info.Name
+					}
+				}
+
+				// Check if can move original action
+				if i := ActionSliceIndex(operation.Actions, resolvedPkg.DatabaseEntry.Info.Name); i != -1 {
+					newActions[len(newActions)-1] = operation.Actions[i]
+				}
 			}
 		}
-		pos++
-	}
 
-	return nil
-}
-
-func (operation *BPMOperation) RemoveNeededPackages() error {
-	removeActions := make(map[string]*RemovePackageAction)
-	for _, action := range slices.Clone(operation.Actions) {
-		if action.GetActionType() == "remove" {
-			removeActions[action.(*RemovePackageAction).BpmPackage.PkgInfo.Name] = action.(*RemovePackageAction)
+		if ActionSliceIndex(newActions, pkgInfo.Name) == -1 {
+			newActions = append(newActions, value)
 		}
 	}
 
-	for pkg, action := range removeActions {
-		dependants, err := GetPackageDependants(action.BpmPackage.PkgInfo.Name, operation.RootDir)
-		if err != nil {
-			return errors.New("could not get dependant packages for package (" + pkg + ")")
-		}
-		dependants = slices.DeleteFunc(dependants, func(d string) bool {
-			if _, ok := removeActions[d]; ok {
-				return true
-			}
-			return false
-		})
-		if len(dependants) != 0 {
-			operation.RemoveAction(pkg, action.GetActionType())
-		}
-	}
-
-	return nil
+	operation.Actions = newActions
 }
 
 func (operation *BPMOperation) Cleanup(cleanupMakeDepends bool) error {
@@ -199,11 +144,11 @@ func (operation *BPMOperation) Cleanup(cleanupMakeDepends bool) error {
 	}
 	installedPackages := make([]*PackageInfo, len(installedPackageNames))
 	for i, value := range installedPackageNames {
-		bpmpkg := GetPackage(value, operation.RootDir)
-		if bpmpkg == nil {
+		pkgInfo := GetPackageInfo(value, operation.RootDir)
+		if pkgInfo == nil {
 			return errors.New("could not find installed package (" + value + ")")
 		}
-		installedPackages[i] = bpmpkg.PkgInfo
+		installedPackages[i] = pkgInfo
 	}
 
 	// Get packages to remove
@@ -214,34 +159,70 @@ func (operation *BPMOperation) Cleanup(cleanupMakeDepends bool) error {
 		}
 	}
 
-	// Get manually installed packages, resolve all their dependencies and add them to the keepPackages slice
-	keepPackages := make([]string, 0)
-	for _, pkg := range slices.Clone(installedPackages) {
-		if GetInstallationReason(pkg.Name, operation.RootDir) != InstallationReasonManual {
+	// Run BFS on all manually installed packages
+	visited := make([]string, 0)
+	for _, pkg := range installedPackages {
+		if getPackageLocalInfo(pkg.Name, operation.RootDir).GetInstallationReason() != InstallationReasonManual {
 			continue
 		}
 
-		// Do not resolve dependencies or add package to keepPackages slice if package removal action exists for it
-		if _, ok := removeActions[pkg.Name]; ok {
-			continue
-		}
+		queue := make([]*PackageInfo, 0)
 
-		keepPackages = append(keepPackages, pkg.Name)
-		resolved := pkg.GetAllDependencies(!cleanupMakeDepends, true, operation.RootDir)
-		for _, value := range resolved {
-			if !slices.Contains(keepPackages, value) {
-				keepPackages = append(keepPackages, value)
+		queue = append(queue, pkg)
+
+		for len(queue) > 0 {
+			v := queue[len(queue)-1]
+			queue = queue[:len(queue)-1]
+
+			// Skip package if it's to be removed
+			if _, ok := removeActions[v.Name]; ok {
+				continue
+			}
+
+			// Mark package as visited
+			visited = append(visited, v.Name)
+
+			// Get all package dependencies
+			depends := v.Depends
+			depends = append(depends, v.RuntimeDepends...)
+			if cleanupMakeDepends && v.Type == "source" {
+				depends = append(depends, v.MakeDepends...)
+				depends = append(depends, v.CheckDepends...)
+			}
+
+			// Loop through all dependencies
+			for _, depend := range depends {
+				// Remove required version
+				depend, _, _ = SplitPkgNameAndVersion(depend)
+
+				// Resolve dependency
+				var dependPkgInfo *PackageInfo
+				if providers := GetVirtualPackageInfo(depend, operation.RootDir); len(providers) > 0 {
+					dependPkgInfo = providers[0]
+				} else {
+					dependPkgInfo = GetPackageInfo(depend, operation.RootDir)
+				}
+				if dependPkgInfo == nil {
+					continue
+				}
+
+				// Mark dependency as visited and add it to the queue
+				if !slices.Contains(visited, dependPkgInfo.Name) {
+					visited = append(visited, dependPkgInfo.Name)
+					queue = append(queue, dependPkgInfo)
+				}
 			}
 		}
 	}
 
-	// Get all installed packages that are not in the keepPackages slice and add them to the BPM operation
+	// Remove all packages that were not discovered after running BFS
 	for _, pkg := range installedPackageNames {
 		// Do not add package removal action if there already is one
 		if _, ok := removeActions[pkg]; ok {
 			continue
 		}
-		if !slices.Contains(keepPackages, pkg) {
+
+		if !slices.Contains(visited, pkg) {
 			bpmpkg := GetPackage(pkg, operation.RootDir)
 			if bpmpkg == nil {
 				return errors.New("Error: could not find installed package (" + pkg + ")")
@@ -268,63 +249,102 @@ func (operation *BPMOperation) ReplaceObsoletePackages() {
 		}
 
 		for _, r := range pkgInfo.Replaces {
-			if bpmpkg := GetPackage(r, operation.RootDir); bpmpkg != nil && !operation.ActionsContainPackage(bpmpkg.PkgInfo.Name) {
-				operation.InsertActionAt(0, &RemovePackageAction{
+			if bpmpkg := GetPackage(r, operation.RootDir); bpmpkg != nil && ActionSliceIndex(operation.Actions, bpmpkg.PkgInfo.Name) == -1 {
+				var action OperationAction = &RemovePackageAction{
 					BpmPackage: bpmpkg,
-				})
+				}
+				operation.Actions = slices.Insert(operation.Actions, 0, action)
 			}
 		}
 	}
 }
 
-func (operation *BPMOperation) CheckForConflicts() (map[string][]string, error) {
+func (operation *BPMOperation) CheckForConflicts() map[string][]string {
 	conflicts := make(map[string][]string)
-	installedPackages, err := GetInstalledPackages(operation.RootDir)
-	if err != nil {
-		return nil, err
-	}
-	allPackages := make([]*PackageInfo, len(installedPackages))
-	for i, value := range installedPackages {
-		bpmpkg := GetPackage(value, operation.RootDir)
-		if bpmpkg == nil {
-			return nil, fmt.Errorf("could not find installed package (%s)", value)
+
+	// Get installed packages
+	installedPackages := localPackageInformation[operation.RootDir]
+
+	// Get packages to be removed
+	removedPackages := make([]string, 0)
+	for _, value := range slices.Clone(operation.Actions) {
+		if value.GetActionType() != "remove" {
+			continue
 		}
-		allPackages[i] = bpmpkg.PkgInfo
+
+		removedPackages = append(removedPackages, value.(*RemovePackageAction).BpmPackage.PkgInfo.Name)
 	}
 
-	// Add all new packages to the allPackages slice
+	// Check for conflicts
 	for _, value := range slices.Clone(operation.Actions) {
+		var pkgInfo *PackageInfo
 		if value.GetActionType() == "install" {
-			action := value.(*InstallPackageAction)
-			pkgInfo := action.BpmPackage.PkgInfo
-			allPackages = append(allPackages, pkgInfo)
+			pkgInfo = value.(*InstallPackageAction).BpmPackage.PkgInfo
 		} else if value.GetActionType() == "fetch" {
-			action := value.(*FetchPackageAction)
-			pkgInfo := action.DatabaseEntry.Info
-			allPackages = append(allPackages, pkgInfo)
-		} else if value.GetActionType() == "remove" {
-			action := value.(*RemovePackageAction)
-			pkgInfo := action.BpmPackage.PkgInfo
-			for i := len(allPackages) - 1; i >= 0; i-- {
-				info := allPackages[i]
-				if info.Name == pkgInfo.Name {
-					allPackages = append(allPackages[:i], allPackages[i+1:]...)
+			pkgInfo = value.(*FetchPackageAction).DatabaseEntry.Info
+		} else {
+			continue
+		}
+
+		// Check for conflicts with installed packages
+		for _, installedPkg := range installedPackages {
+			// Skip if package is to be removed
+			if slices.Contains(removedPackages, installedPkg.Name) {
+				continue
+			}
+
+			// Skip if same package
+			if pkgInfo.Name == installedPkg.Name {
+				continue
+			}
+
+			// Check for new package conflicts
+			if slices.Contains(pkgInfo.Conflicts, installedPkg.Name) {
+				conflicts[pkgInfo.Name] = append(conflicts[pkgInfo.Name], installedPkg.Name)
+			}
+			for _, vpkg := range installedPkg.Provides {
+				if slices.Contains(pkgInfo.Conflicts, vpkg) {
+					conflicts[pkgInfo.Name] = append(conflicts[pkgInfo.Name], vpkg+" ("+installedPkg.Name+")")
+				}
+			}
+
+			// Check for installed package conflicts
+			for _, vpkg := range pkgInfo.Provides {
+				if slices.Contains(installedPkg.Conflicts, vpkg) {
+					conflicts[installedPkg.Name] = append(conflicts[installedPkg.Name], vpkg+" ("+pkgInfo.Name+")")
+				}
+			}
+		}
+
+		// Check for conflicts with other new packages
+		for _, value := range slices.Clone(operation.Actions) {
+			var pkgInfo2 *PackageInfo
+			if value.GetActionType() == "install" {
+				pkgInfo2 = value.(*InstallPackageAction).BpmPackage.PkgInfo
+			} else if value.GetActionType() == "fetch" {
+				pkgInfo2 = value.(*FetchPackageAction).DatabaseEntry.Info
+			} else {
+				continue
+			}
+
+			// Skip if same package
+			if pkgInfo.Name == pkgInfo2.Name {
+				continue
+			}
+
+			// Check for other package conflicts
+			if slices.Contains(pkgInfo.Conflicts, pkgInfo2.Name) {
+				conflicts[pkgInfo.Name] = append(conflicts[pkgInfo.Name], pkgInfo2.Name)
+			}
+			for _, vpkg := range pkgInfo2.Provides {
+				if slices.Contains(pkgInfo.Conflicts, vpkg) {
+					conflicts[pkgInfo.Name] = append(conflicts[pkgInfo.Name], vpkg+" ("+pkgInfo2.Name+")")
 				}
 			}
 		}
 	}
 
-	for _, value := range allPackages {
-		for _, conflict := range value.Conflicts {
-			if slices.ContainsFunc(allPackages, func(info *PackageInfo) bool {
-				return info.Name == conflict
-			}) {
-				conflicts[value.Name] = append(conflicts[value.Name], conflict)
-			}
-		}
-	}
-
-	return conflicts, nil
+	return conflicts
 }
 
 func (operation *BPMOperation) ShowOperationSummary() {
@@ -333,6 +353,9 @@ func (operation *BPMOperation) ShowOperationSummary() {
 		return
 	}
 
+	writer := tabwriter.NewWriter(os.Stdout, 6, 4, 6, ' ', 0)
+	fmt.Fprintln(writer, "Name\tVersion\tAction\tInstallation Reason\tFrom Source")
+
 	for _, value := range operation.Actions {
 		var pkgInfo *PackageInfo
 		var installationReason = InstallationReasonUnknown
@@ -347,55 +370,132 @@ func (operation *BPMOperation) ShowOperationSummary() {
 			pkgInfo = value.(*FetchPackageAction).DatabaseEntry.Info
 		} else {
 			pkgInfo = value.(*RemovePackageAction).BpmPackage.PkgInfo
-			fmt.Printf("%s: %s (Remove)\n", pkgInfo.Name, pkgInfo.GetFullVersion())
+			fmt.Fprintf(writer, "%s\t%s\t%s\t%s\t%s\n", pkgInfo.Name, pkgInfo.GetFullVersion(), "Remove", "-", "-")
 			continue
 		}
 
-		installedInfo := GetPackageInfo(pkgInfo.Name, operation.RootDir)
-		additionalInfo := ""
+		installationReasonStr := ""
 		switch installationReason {
 		case InstallationReasonManual:
-			additionalInfo = "(Manual)"
+			installationReasonStr = "Manual"
 		case InstallationReasonDependency:
-			additionalInfo = "(Dependency)"
+			installationReasonStr = "Dependency"
 		case InstallationReasonMakeDependency:
-			additionalInfo = "(Make dependency)"
+			installationReasonStr = "Make dependency"
 		default:
-			additionalInfo = "(Unknown)"
-		}
-
-		if pkgInfo.Type == "source" {
-			additionalInfo += " (From Source)"
+			installationReasonStr = "Unknown"
 		}
 
+		installedInfo := GetPackageInfo(pkgInfo.Name, operation.RootDir)
 		if installedInfo == nil {
-			fmt.Printf("%s: %s (Install) %s\n", pkgInfo.Name, pkgInfo.GetFullVersion(), additionalInfo)
+			fmt.Fprintf(writer, "%s\t%s\t%s\t%s\t%t\n", pkgInfo.Name, pkgInfo.GetFullVersion(), "Install", installationReasonStr, pkgInfo.Type == "source")
 		} else {
-			comparison := ComparePackageVersions(*pkgInfo, *installedInfo)
+			comparison := CompareVersions(pkgInfo.GetFullVersion(), installedInfo.GetFullVersion())
 			if comparison < 0 {
-				fmt.Printf("%s: %s -> %s (Downgrade) %s\n", pkgInfo.Name, installedInfo.GetFullVersion(), pkgInfo.GetFullVersion(), additionalInfo)
+				fmt.Fprintf(writer, "%s\t%s -> %s\t%s\t%s\t%t\n", pkgInfo.Name, installedInfo.GetFullVersion(), pkgInfo.GetFullVersion(), "Downgrade", installationReasonStr, pkgInfo.Type == "source")
 			} else if comparison > 0 {
-				fmt.Printf("%s: %s -> %s (Upgrade) %s\n", pkgInfo.Name, installedInfo.GetFullVersion(), pkgInfo.GetFullVersion(), additionalInfo)
+				fmt.Fprintf(writer, "%s\t%s -> %s\t%s\t%s\t%t\n", pkgInfo.Name, installedInfo.GetFullVersion(), pkgInfo.GetFullVersion(), "Upgrade", installationReasonStr, pkgInfo.Type == "source")
 			} else {
-				fmt.Printf("%s: %s (Reinstall) %s\n", pkgInfo.Name, pkgInfo.GetFullVersion(), additionalInfo)
+				fmt.Fprintf(writer, "%s\t%s\t%s\t%s\t%t\n", pkgInfo.Name, pkgInfo.GetFullVersion(), "Reinstall", installationReasonStr, pkgInfo.Type == "source")
 			}
 		}
 	}
 
+	writer.Flush()
+	fmt.Println()
+
 	if operation.RootDir != "/" {
 		fmt.Println("Warning: Operating in " + operation.RootDir)
 	}
 	if operation.GetTotalDownloadSize() > 0 {
-		fmt.Printf("%s will be downloaded to complete this operation\n", unsignedBytesToHumanReadable(operation.GetTotalDownloadSize()))
+		fmt.Printf("%s will be downloaded to complete this operation\n", BytesToHumanReadable(operation.GetTotalDownloadSize()))
 	}
 	if operation.GetFinalActionSize(operation.RootDir) > 0 {
-		fmt.Printf("A total of %s will be installed after the operation finishes\n", bytesToHumanReadable(operation.GetFinalActionSize(operation.RootDir)))
+		fmt.Printf("A total of %s will be installed after the operation finishes\n", BytesToHumanReadable(operation.GetFinalActionSize(operation.RootDir)))
 	} else if operation.GetFinalActionSize(operation.RootDir) < 0 {
-		fmt.Printf("A total of %s will be freed after the operation finishes\n", strings.TrimPrefix(bytesToHumanReadable(operation.GetFinalActionSize(operation.RootDir)), "-"))
+		fmt.Printf("A total of %s will be freed after the operation finishes\n", strings.TrimPrefix(BytesToHumanReadable(operation.GetFinalActionSize(operation.RootDir)), "-"))
 	}
 }
 
-func (operation *BPMOperation) RunHooks(verbose bool) error {
+func (operation *BPMOperation) ShowSourcePackageContent() (sourcePackagesShown int, err error) {
+	// Fetch packages
+	if !operation.hasFetchedPackages {
+		err = operation.FetchPackages()
+		if err != nil {
+			return 0, err
+		}
+	}
+
+	for _, action := range operation.Actions {
+		if action.GetActionType() != "install" {
+			continue
+		}
+		if action.(*InstallPackageAction).BpmPackage.PkgInfo.Type != "source" {
+			continue
+		}
+
+		err = showPackageFiles(action.(*InstallPackageAction).File)
+		if err != nil {
+			return 0, err
+		}
+
+		sourcePackagesShown++
+	}
+
+	return sourcePackagesShown, nil
+}
+
+func (operation *BPMOperation) GetOptionalDependencies() (optionalDepends map[string][]string) {
+	optionalDepends = make(map[string][]string)
+
+	// Find all optional dependencies
+	for _, value := range slices.Clone(operation.Actions) {
+		var pkgInfo *PackageInfo
+		if value.GetActionType() == "install" {
+			action := value.(*InstallPackageAction)
+			pkgInfo = action.BpmPackage.PkgInfo
+		} else if value.GetActionType() == "fetch" {
+			action := value.(*FetchPackageAction)
+			pkgInfo = action.DatabaseEntry.Info
+		} else {
+			continue
+		}
+
+		for _, depend := range pkgInfo.OptionalDepends {
+			// Get optional dependency name
+			dependSplit := strings.SplitN(depend, ":", 2)
+			dependName, _, _ := SplitPkgNameAndVersion(dependSplit[0])
+
+			// Skip if dependency is already installed
+			if IsPackageInstalled(dependName, operation.RootDir) {
+				continue
+			}
+
+			// Skip if not a new dependency of the package
+			if installedPkg := GetPackage(pkgInfo.Name, operation.RootDir); installedPkg != nil && slices.ContainsFunc(installedPkg.PkgInfo.OptionalDepends, func(n string) bool {
+				// Remove optional dependency comment
+				n = strings.SplitN(n, ":", 2)[0]
+
+				// Remove required version
+				n, _, _ = SplitPkgNameAndVersion(n)
+
+				return n == dependName
+			}) {
+				continue
+			}
+
+			if len(dependSplit) == 2 {
+				optionalDepends[pkgInfo.Name] = append(optionalDepends[pkgInfo.Name], fmt.Sprintf("%s (%s)", dependSplit[0], dependSplit[1]))
+			} else {
+				optionalDepends[pkgInfo.Name] = append(optionalDepends[pkgInfo.Name], dependName)
+			}
+		}
+	}
+
+	return
+}
+
+func (operation *BPMOperation) RunPreHooks(verbose bool) error {
 	// Return if hooks directory does not exist
 	if stat, err := os.Stat(path.Join(operation.RootDir, "var/lib/bpm/hooks")); err != nil || !stat.IsDir() {
 		return nil
@@ -415,7 +515,11 @@ func (operation *BPMOperation) RunHooks(verbose bool) error {
 				log.Printf("Error while reading hook (%s): %s", entry.Name(), err)
 			}
 
-			err = hook.Execute(operation.Changes, verbose, operation.RootDir)
+			if !hook.TriggerPreOperation {
+				continue
+			}
+
+			err = hook.Execute(operation.ModifiedFiles, false, verbose, operation.RootDir)
 			if err != nil {
 				log.Printf("Warning: could not execute hook (%s): %s\n", entry.Name(), err)
 				continue
@@ -426,7 +530,42 @@ func (operation *BPMOperation) RunHooks(verbose bool) error {
 	return nil
 }
 
-func (operation *BPMOperation) Execute(verbose, force bool) (err error) {
+func (operation *BPMOperation) RunPostHooks(verbose bool) error {
+	// Return if hooks directory does not exist
+	if stat, err := os.Stat(path.Join(operation.RootDir, "var/lib/bpm/hooks")); err != nil || !stat.IsDir() {
+		return nil
+	}
+
+	// Get directory entries in hooks directory
+	dirEntries, err := os.ReadDir(path.Join(operation.RootDir, "var/lib/bpm/hooks"))
+	if err != nil {
+		return err
+	}
+
+	// Find all hooks, validate and execute them
+	for _, entry := range dirEntries {
+		if entry.Type().IsRegular() && strings.HasSuffix(entry.Name(), ".bpmhook") {
+			hook, err := createHook(path.Join(operation.RootDir, "var/lib/bpm/hooks", entry.Name()))
+			if err != nil {
+				log.Printf("Error while reading hook (%s): %s", entry.Name(), err)
+			}
+
+			if hook.TriggerPreOperation {
+				continue
+			}
+
+			err = hook.Execute(operation.ModifiedFiles, false, verbose, operation.RootDir)
+			if err != nil {
+				log.Printf("Warning: could not execute hook (%s): %s\n", entry.Name(), err)
+				continue
+			}
+		}
+	}
+
+	return nil
+}
+
+func (operation *BPMOperation) FetchPackages() (err error) {
 	// Fetch packages from databases
 	if slices.ContainsFunc(operation.Actions, func(action OperationAction) bool {
 		return action.GetActionType() == "fetch"
@@ -448,7 +587,7 @@ func (operation *BPMOperation) Execute(verbose, force bool) (err error) {
 			var bpmpkg *BPMPackage
 
 			// Check if package has already been fetched from download link
-			if _, ok := fetchedPackages[entry.Download]; !ok {
+			if fetchedFilepath, ok := fetchedPackages[entry.Filepath]; !ok {
 				// Fetch package from database
 				fetchedPackage, err := entry.Database.FetchPackage(entry.Info.Name)
 				if err != nil {
@@ -462,29 +601,35 @@ func (operation *BPMOperation) Execute(verbose, force bool) (err error) {
 				}
 
 				// Add fetched package to map
-				fetchedPackages[entry.Download] = fetchedPackage
-
-				fmt.Printf("Package (%s) was successfully fetched!\n", entry.Info.Name)
+				fetchedPackages[entry.Filepath] = fetchedPackage
 			} else {
 				// Read fetched package
-				bpmpkg, err = ReadPackage(fetchedPackages[entry.Download])
+				bpmpkg, err = ReadPackage(fetchedFilepath)
 				if err != nil {
 					return fmt.Errorf("could not read package (%s): %s\n", entry.Info.Name, err)
 				}
 
-				fmt.Printf("Package (%s) was successfully fetched!\n", entry.Info.Name)
+				// Get size of fetched archive
+				stat, err := os.Stat(fetchedFilepath)
+				if err != nil {
+					return err
+				}
+
+				bar := createProgressBar(stat.Size(), "Downloading "+entry.Info.Name, false)
+				bar.Set64(stat.Size())
+				bar.Close()
 			}
 
 			if bpmpkg.PkgInfo.IsSplitPackage() {
 				operation.Actions[i] = &InstallPackageAction{
-					File:                  fetchedPackages[entry.Download],
+					File:                  fetchedPackages[entry.Filepath],
 					InstallationReason:    action.(*FetchPackageAction).InstallationReason,
 					BpmPackage:            bpmpkg,
 					SplitPackageToInstall: entry.Info.Name,
 				}
 			} else {
 				operation.Actions[i] = &InstallPackageAction{
-					File:               fetchedPackages[entry.Download],
+					File:               fetchedPackages[entry.Filepath],
 					InstallationReason: action.(*FetchPackageAction).InstallationReason,
 					BpmPackage:         bpmpkg,
 				}
@@ -492,6 +637,44 @@ func (operation *BPMOperation) Execute(verbose, force bool) (err error) {
 		}
 	}
 
+	operation.hasFetchedPackages = true
+
+	return nil
+}
+
+func (operation *BPMOperation) GetModifiedFiles() {
+	// Get modified files
+	for _, action := range operation.Actions {
+		if action.GetActionType() == "install" {
+			installAction := action.(*InstallPackageAction)
+			isUpgrade := IsPackageInstalled(installAction.BpmPackage.PkgInfo.Name, operation.RootDir)
+
+			for _, pkgFile := range installAction.BpmPackage.PkgFiles {
+				operation.ModifiedFiles[pkgFile.Path] = "install"
+				if isUpgrade {
+					operation.ModifiedFiles[pkgFile.Path] = "upgrade"
+				}
+			}
+		}
+		if action.GetActionType() == "remove" {
+			removeAction := action.(*RemovePackageAction)
+
+			for _, pkgFile := range removeAction.BpmPackage.PkgFiles {
+				operation.ModifiedFiles[pkgFile.Path] = "remove"
+			}
+		}
+	}
+}
+
+func (operation *BPMOperation) Execute(verbose, force bool) (err error) {
+	// Fetch packages
+	if !operation.hasFetchedPackages {
+		err = operation.FetchPackages()
+		if err != nil {
+			return err
+		}
+	}
+
 	// Determine words to be used for the following message
 	words := make([]string, 0)
 	if slices.ContainsFunc(operation.Actions, func(action OperationAction) bool {
@@ -546,7 +729,7 @@ func (operation *BPMOperation) Execute(verbose, force bool) (err error) {
 
 				// Compile source package if not compiled already
 				if _, ok := operation.compiledPackages[pkgNameToInstall]; !ok {
-					outputBpmPackages, err := CompileSourcePackage(value.File, compiledDir, false)
+					outputBpmPackages, err := CompileSourcePackage(value.File, compiledDir, operation.CompilationJobs, !operation.RunChecks, false, verbose)
 					if err != nil {
 						return fmt.Errorf("could not compile source package (%s): %s\n", value.File, err)
 					}
@@ -566,24 +749,15 @@ func (operation *BPMOperation) Execute(verbose, force bool) (err error) {
 			}
 
 			if value.InstallationReason != InstallationReasonManual {
-				err = installPackage(fileToInstall, operation.RootDir, verbose, true)
+				err = installPackage(fileToInstall, value.InstallationReason, operation.RootDir, verbose, true)
 			} else {
-				err = installPackage(fileToInstall, operation.RootDir, verbose, force)
+				err = installPackage(fileToInstall, value.InstallationReason, operation.RootDir, verbose, force)
 			}
 			if err != nil {
 				return fmt.Errorf("could not install package (%s): %s\n", bpmpkg.PkgInfo.Name, err)
 			}
-
-			// Set installed package's installation reason
-			err = SetInstallationReason(bpmpkg.PkgInfo.Name, value.InstallationReason, operation.RootDir)
-			if err != nil {
-				return fmt.Errorf("could not set installation reason for package (%s): %s\n", value.BpmPackage.PkgInfo.Name, err)
-			}
-
-			fmt.Printf("Package (%s) was successfully installed\n", bpmpkg.PkgInfo.Name)
 		}
 	}
-	fmt.Println("Operation complete!")
 
 	return nil
 }
@@ -619,3 +793,41 @@ type RemovePackageAction struct {
 func (action *RemovePackageAction) GetActionType() string {
 	return "remove"
 }
+
+func ActionSliceIndex(actions []OperationAction, pkg string) int {
+	for i, action := range actions {
+		if action.GetActionType() == "install" {
+			if action.(*InstallPackageAction).BpmPackage.PkgInfo.Name == pkg {
+				return i
+			}
+		} else if action.GetActionType() == "fetch" {
+			if action.(*FetchPackageAction).DatabaseEntry.Info.Name == pkg {
+				return i
+			}
+		} else if action.GetActionType() == "remove" {
+			if action.(*RemovePackageAction).BpmPackage.PkgInfo.Name == pkg {
+				return i
+			}
+		}
+	}
+
+	return -1
+}
+
+func ActionSliceRemove(actions []OperationAction, pkg, actionType string) []OperationAction {
+	actions = slices.DeleteFunc(actions, func(a OperationAction) bool {
+		if a.GetActionType() != actionType {
+			return false
+		}
+		if a.GetActionType() == "install" {
+			return a.(*InstallPackageAction).BpmPackage.PkgInfo.Name == pkg
+		} else if a.GetActionType() == "fetch" {
+			return a.(*FetchPackageAction).DatabaseEntry.Info.Name == pkg
+		} else if a.GetActionType() == "remove" {
+			return a.(*RemovePackageAction).BpmPackage.PkgInfo.Name == pkg
+		}
+		return false
+	})
+
+	return actions
+}

src/bpmlib/packages.go

@@ -10,38 +10,64 @@ import (
 	"os"
 	"os/exec"
 	"path"
+	"path/filepath"
+	"regexp"
 	"slices"
 	"sort"
 	"strconv"
 	"strings"
 	"syscall"
+	"time"
 
-	version "github.com/knqyf263/go-rpm-version"
 	"gopkg.in/yaml.v3"
 )
 
 type BPMPackage struct {
-	PkgInfo  *PackageInfo
-	PkgFiles []*PackageFileEntry
+	PkgInfo   *PackageInfo
+	PkgFiles  []*PackageFileEntry
+	LocalInfo PackageLocalInfo
 }
 
 type PackageInfo struct {
-	Name            string         `yaml:"name,omitempty"`
-	Description     string         `yaml:"description,omitempty"`
-	Version         string         `yaml:"version,omitempty"`
-	Revision        int            `yaml:"revision,omitempty"`
-	Url             string         `yaml:"url,omitempty"`
-	License         string         `yaml:"license,omitempty"`
-	Arch            string         `yaml:"architecture,omitempty"`
-	Type            string         `yaml:"type,omitempty"`
-	Keep            []string       `yaml:"keep,omitempty"`
-	Depends         []string       `yaml:"depends,omitempty"`
-	MakeDepends     []string       `yaml:"make_depends,omitempty"`
-	OptionalDepends []string       `yaml:"optional_depends,omitempty"`
-	Conflicts       []string       `yaml:"conflicts,omitempty"`
-	Replaces        []string       `yaml:"replaces,omitempty"`
-	Provides        []string       `yaml:"provides,omitempty"`
-	SplitPackages   []*PackageInfo `yaml:"split_packages,omitempty"`
+	Name            string            `yaml:"name"`
+	Description     string            `yaml:"description,omitempty"`
+	Version         string            `yaml:"version,omitempty"`
+	Revision        int               `yaml:"revision,omitempty"`
+	Url             string            `yaml:"url,omitempty"`
+	License         string            `yaml:"license,omitempty"`
+	Maintainers     []string          `yaml:"maintainers,omitempty"`
+	Arch            string            `yaml:"architecture,omitempty"`
+	OutputArch      string            `yaml:"output_architecture,omitempty"`
+	Type            string            `yaml:"type,omitempty"`
+	Keep            []string          `yaml:"keep,omitempty"`
+	Depends         []string          `yaml:"depends,omitempty"`
+	RuntimeDepends  []string          `yaml:"runtime_depends,omitempty"`
+	OptionalDepends []string          `yaml:"optional_depends,omitempty"`
+	MakeDepends     []string          `yaml:"make_depends,omitempty"`
+	CheckDepends    []string          `yaml:"check_depends,omitempty"`
+	Conflicts       []string          `yaml:"conflicts,omitempty"`
+	Replaces        []string          `yaml:"replaces,omitempty"`
+	Provides        []string          `yaml:"provides,omitempty"`
+	Options         []string          `yaml:"options,omitempty"`
+	Downloads       []PackageDownload `yaml:"downloads,omitempty"`
+	SplitPackages   []*PackageInfo    `yaml:"split_packages,omitempty"`
+}
+
+type PackageDownload struct {
+	Url      string `yaml:"url"`
+	Type     string `yaml:"type,omitempty"`
+	Filepath string `yaml:"filepath,omitempty"`
+
+	// Archive options
+	NoExtract              bool   `yaml:"no_extract,omitempty"`
+	ExtractTo              string `yaml:"extract_to,omitempty"`
+	ExtractStripComponents int    `yaml:"extract_strip_components,omitempty"`
+
+	// Git options
+	CloneTo   string `yaml:"clone_to,omitempty"`
+	GitBranch string `yaml:"git_branch,omitempty"`
+
+	Checksum string `yaml:"checksum,omitempty"`
 }
 
 type PackageFileEntry struct {
@@ -49,11 +75,17 @@ type PackageFileEntry struct {
 	OctalPerms  uint32
 	UserID      int
 	GroupID     int
-	SizeInBytes uint64
+	SizeInBytes int64
 }
 
-func (pkg *BPMPackage) GetInstalledSize() uint64 {
-	var totalSize uint64 = 0
+type PackageLocalInfo struct {
+	InstallationReason string `yaml:"installation_reason"`
+	InstalledOn        int64  `yaml:"installed_on"`
+	LastUpdatedOn      int64  `yaml:"last_updated_on"`
+}
+
+func (pkg *BPMPackage) GetInstalledSize() int64 {
+	var totalSize int64 = 0
 	for _, entry := range pkg.PkgFiles {
 		totalSize += entry.SizeInBytes
 	}
@@ -100,42 +132,17 @@ const (
 	InstallationReasonUnknown        InstallationReason = "unknown"
 )
 
-func ComparePackageVersions(info1, info2 PackageInfo) int {
-	v1 := version.NewVersion(info1.GetFullVersion())
-	v2 := version.NewVersion(info2.GetFullVersion())
-
-	return v1.Compare(v2)
-}
-
-func GetInstallationReason(pkg, rootDir string) InstallationReason {
-	installedDir := path.Join(rootDir, "var/lib/bpm/installed/")
-	pkgDir := path.Join(installedDir, pkg)
-	if stat, err := os.Stat(path.Join(pkgDir, "installation_reason")); err != nil || stat.IsDir() {
+func (localInfo PackageLocalInfo) GetInstallationReason() InstallationReason {
+	switch localInfo.InstallationReason {
+	case "manual":
 		return InstallationReasonManual
-	}
-	b, err := os.ReadFile(path.Join(pkgDir, "installation_reason"))
-	if err != nil {
+	case "dependency":
+		return InstallationReasonDependency
+	case "make_dependency":
+		return InstallationReasonMakeDependency
+	default:
 		return InstallationReasonUnknown
 	}
-	reason := strings.TrimSpace(string(b))
-	if reason == "manual" {
-		return InstallationReasonManual
-	} else if reason == "dependency" {
-		return InstallationReasonDependency
-	} else if reason == "make_dependency" {
-		return InstallationReasonMakeDependency
-	}
-	return InstallationReasonUnknown
-}
-
-func SetInstallationReason(pkg string, reason InstallationReason, rootDir string) error {
-	installedDir := path.Join(rootDir, "var/lib/bpm/installed/")
-	pkgDir := path.Join(installedDir, pkg)
-	err := os.WriteFile(path.Join(pkgDir, "installation_reason"), []byte(reason), 0644)
-	if err != nil {
-		return err
-	}
-	return nil
 }
 
 func GetPackageInfoRaw(filename string) (string, error) {
@@ -177,10 +184,10 @@ func ReadPackage(filename string) (*BPMPackage, error) {
 	}
 
 	file, err := os.Open(filename)
-	defer file.Close()
 	if err != nil {
 		return nil, err
 	}
+	defer file.Close()
 
 	tr := tar.NewReader(file)
 	for {
@@ -219,7 +226,7 @@ func ReadPackage(filename string) (*BPMPackage, error) {
 				if err != nil {
 					return nil, err
 				}
-				size, err := strconv.ParseUint(stringEntry[len(stringEntry)-1], 0, 64)
+				size, err := strconv.ParseInt(stringEntry[len(stringEntry)-1], 0, 64)
 				if err != nil {
 					return nil, err
 				}
@@ -303,14 +310,6 @@ func ReadPackageScripts(filename string) (map[string]string, error) {
 	return ret, nil
 }
 
-type packageOperation uint8
-
-const (
-	packageOperationInstall packageOperation = 0
-	packageOperationUpdate                   = 1
-	packageOperationRemove                   = 2
-)
-
 func executePackageScript(pkg, rootDir string, verbose bool, packageScript string) error {
 	var bpmpkg *BPMPackage
 	var err error
@@ -363,9 +362,44 @@ func executePackageScript(pkg, rootDir string, verbose bool, packageScript strin
 	cmd := exec.Command("/bin/bash", "-c", content)
 	// Setup subprocess environment
 	cmd.Dir = "/"
-	// Run hook in chroot if using the -R flag
+	// Run package script in chroot if using the -R flag
 	if rootDir != "/" {
 		cmd.SysProcAttr = &syscall.SysProcAttr{Chroot: rootDir}
+
+		// Bind mount /etc/resolv.conf
+		mounted, err := func() (bool, error) {
+			if _, err := os.Stat("/etc/resolv.conf"); err != nil {
+				return false, nil
+			}
+
+			if _, err := os.Stat(path.Join(rootDir, "etc/resolv.conf")); os.IsNotExist(err) {
+				err = os.WriteFile(path.Join(rootDir, "/etc/resolv.conf"), nil, 0644)
+				if err != nil {
+					return false, nil
+				}
+			} else if err != nil {
+				return false, err
+			}
+
+			mntCmd := exec.Command("mount", "-o", "ro,bind", "/etc/resolv.conf", path.Join(rootDir, "/etc/resolv.conf"))
+			if verbose {
+				mntCmd.Stdout = os.Stdout
+				mntCmd.Stderr = os.Stderr
+			}
+			err = mntCmd.Run()
+			if err != nil {
+				return false, err
+			}
+
+			return true, nil
+		}()
+		if err != nil {
+			return err
+		}
+
+		if mounted {
+			defer exec.Command("umount", "-f", path.Join(rootDir, "/etc/resolv.conf")).Run()
+		}
 	}
 	// Show output if verbose
 	if verbose {
@@ -413,21 +447,18 @@ func executePackageScript(pkg, rootDir string, verbose bool, packageScript strin
 
 func ReadPackageInfo(contents string) (*PackageInfo, error) {
 	pkgInfo := &PackageInfo{
-		Name:            "",
-		Description:     "",
-		Version:         "",
 		Revision:        1,
-		Url:             "",
-		License:         "",
-		Arch:            "",
-		Type:            "",
+		OutputArch:      GetArch(),
 		Keep:            make([]string, 0),
 		Depends:         make([]string, 0),
+		RuntimeDepends:  make([]string, 0),
 		MakeDepends:     make([]string, 0),
 		OptionalDepends: make([]string, 0),
 		Conflicts:       make([]string, 0),
 		Replaces:        make([]string, 0),
 		Provides:        make([]string, 0),
+		Options:         make([]string, 0),
+		Downloads:       make([]PackageDownload, 0),
 		SplitPackages:   make([]*PackageInfo, 0),
 	}
 	err := yaml.Unmarshal([]byte(contents), &pkgInfo)
@@ -455,82 +486,168 @@ func ReadPackageInfo(contents string) (*PackageInfo, error) {
 		}
 	}
 
+	// Ensure package name is valid
+	if match, _ := regexp.MatchString("^[a-zA-Z0-9._-]+$", pkgInfo.Name); !match {
+		return nil, fmt.Errorf("package name (%s) is invalid", pkgInfo.Name)
+	}
+
 	// Setup split package information
 	for i, splitPkg := range pkgInfo.SplitPackages {
 		// Ensure split package contains a name
 		if splitPkg.Name == "" {
-			return nil, fmt.Errorf("invalid split package name: %s", splitPkg.Name)
+			return nil, fmt.Errorf("package name (%s) is invalid", splitPkg.Name)
 		}
 
-		// Turn split package into json data
-		splitPkgJson, err := yaml.Marshal(splitPkg)
+		// Ensure split package name is valid
+		if match, _ := regexp.MatchString("^[a-zA-Z0-9._-]+$", splitPkg.Name); !match {
+			return nil, fmt.Errorf("package name (%s) is invalid", splitPkg.Name)
+		}
+
+		// Turn split package into yaml data
+		splitPkgYaml, err := yaml.Marshal(splitPkg)
 		if err != nil {
 			return nil, err
 		}
 
 		// Clone all main package fields onto split package
-		pkgInfoClone := *pkgInfo
-		pkgInfo.SplitPackages[i] = &pkgInfoClone
+		*splitPkg = *pkgInfo
 
 		// Set split package field of split package to nil
-		pkgInfo.SplitPackages[i].SplitPackages = nil
+		splitPkg.SplitPackages = nil
 
 		// Unmarshal json data back to struct
-		err = yaml.Unmarshal(splitPkgJson, &pkgInfo.SplitPackages[i])
+		err = yaml.Unmarshal(splitPkgYaml, splitPkg)
 		if err != nil {
 			return nil, err
 		}
 
 		// Force set split package version, revision
-		pkgInfo.SplitPackages[i].Version = pkgInfo.Version
-		pkgInfo.SplitPackages[i].Revision = pkgInfo.Revision
+		splitPkg.Version = pkgInfo.Version
+		splitPkg.Revision = pkgInfo.Revision
+
+		pkgInfo.SplitPackages[i] = splitPkg
 	}
 
 	return pkgInfo, nil
 }
 
-func CreateReadableInfo(showArchitecture, showType, showPackageRelations, showInstallationReason bool, pkgInfo *PackageInfo, rootDir string) string {
-	ret := make([]string, 0)
-	appendArray := func(label string, array []string) {
+func (pkgInfo *PackageInfo) CreateReadableInfo(rootDir string) string {
+	builder := strings.Builder{}
+	builderWriteStringNotEmpty := func(label string, value string) {
+		if value != "" {
+			builder.WriteString(label + ": " + value + "\n")
+		}
+	}
+	builderWriteArray := func(label string, array []string, sort bool) {
 		if len(array) == 0 {
 			return
 		}
-		ret = append(ret, fmt.Sprintf("%s: %s", label, strings.Join(array, ", ")))
-	}
-	ret = append(ret, "Name: "+pkgInfo.Name)
-	ret = append(ret, "Description: "+pkgInfo.Description)
-	ret = append(ret, "Version: "+pkgInfo.GetFullVersion())
-	ret = append(ret, "URL: "+pkgInfo.Url)
-	ret = append(ret, "License: "+pkgInfo.License)
-	if showArchitecture {
-		ret = append(ret, "Architecture: "+pkgInfo.Arch)
-	}
-	if showType {
-		ret = append(ret, "Type: "+pkgInfo.Type)
-	}
-	if showPackageRelations {
-		appendArray("Dependencies", pkgInfo.Depends)
-		if pkgInfo.Type == "source" {
-			appendArray("Make Dependencies", pkgInfo.MakeDepends)
+
+		// Sort array
+		if sort {
+			slices.Sort(array)
 		}
-		appendArray("Optional dependencies", pkgInfo.OptionalDepends)
-		dependants, err := GetPackageDependants(pkgInfo.Name, rootDir)
-		if err == nil {
-			appendArray("Dependant packages", dependants)
+
+		builder.WriteString(label + " (" + strconv.Itoa(len(array)) + "):\n")
+		for _, val := range array {
+			builder.WriteString("  - " + val + "\n")
 		}
-		appendArray("Conflicting packages", pkgInfo.Conflicts)
-		appendArray("Provided packages", pkgInfo.Provides)
-		appendArray("Replaces packages", pkgInfo.Replaces)
 	}
+	builderWriteDependencyArray := func(label string, depends []string) {
+		if len(depends) == 0 {
+			return
+		}
+
+		// Sort array
+		slices.Sort(depends)
+
+		builder.WriteString(label + " (" + strconv.Itoa(len(depends)) + "):\n")
+		for _, val := range depends {
+			builder.WriteString("  - " + val)
+
+			// Show virtual package providers
+			if providers := GetVirtualPackageInfo(val, rootDir); len(providers) > 0 {
+				builder.WriteString(" (")
+				for i, vpkg := range providers {
+					if i == len(providers)-1 {
+						builder.WriteString(vpkg.Name)
+					} else {
+						builder.WriteString(vpkg.Name + ", ")
+					}
+				}
+				builder.WriteString(")")
+			}
+
+			builder.WriteString("\n")
+		}
+	}
+
+	// Main information
+	builder.WriteString("Name: " + pkgInfo.Name + "\n")
+	builder.WriteString("Description: " + pkgInfo.Description + "\n")
+	builder.WriteString("Version: " + pkgInfo.GetFullVersion() + "\n")
+	builderWriteStringNotEmpty("URL", pkgInfo.Url)
+	builderWriteStringNotEmpty("License", pkgInfo.License)
+	builderWriteArray("Maintainers", pkgInfo.Maintainers, false)
+	builder.WriteString("Architecture: " + pkgInfo.Arch + "\n")
+	if pkgInfo.Type == "source" && pkgInfo.OutputArch != "" && pkgInfo.OutputArch != GetArch() {
+		builder.WriteString("Output architecture: " + pkgInfo.OutputArch + "\n")
+	}
+	builder.WriteString("Type: " + pkgInfo.Type + "\n")
+
+	// Dependencies
+	builderWriteDependencyArray("Dependencies", pkgInfo.Depends)
+	if pkgInfo.Type == "source" {
+		builderWriteDependencyArray("Make dependencies", pkgInfo.MakeDepends)
+		builderWriteDependencyArray("Check dependencies", pkgInfo.CheckDepends)
+	}
+	builderWriteDependencyArray("Runtime dependencies", pkgInfo.RuntimeDepends)
+	if len(pkgInfo.OptionalDepends) > 0 {
+		builder.WriteString("Optional dependencies (" + strconv.Itoa(len(pkgInfo.OptionalDepends)) + "):\n")
+		for _, depend := range pkgInfo.OptionalDepends {
+			dependSplit := strings.SplitN(depend, ":", 2)
+			if len(dependSplit) == 2 {
+				builder.WriteString(fmt.Sprintf("  - %s (%s)", dependSplit[0], dependSplit[1]))
+			} else {
+				builder.WriteString("  - " + dependSplit[0])
+			}
+
+			// Show virtual package providers
+			if providers := GetVirtualPackageInfo(dependSplit[0], rootDir); len(providers) > 0 {
+				builder.WriteString(" (")
+				for i, vpkg := range providers {
+					if i == len(providers)-1 {
+						builder.WriteString(vpkg.Name)
+					} else {
+						builder.WriteString(vpkg.Name + ", ")
+					}
+				}
+				builder.WriteString(")")
+			}
+
+			builder.WriteString("\n")
+		}
+	}
+	builderWriteArray("Dependant packages", pkgInfo.GetPackageDependants(rootDir, false), true)
+	builderWriteArray("Optionally dependant packages", pkgInfo.GetPackageOptionalDependants(rootDir), true)
+
+	// Other package relations
+	builderWriteArray("Conflicting packages", pkgInfo.Conflicts, true)
+	builderWriteArray("Provided packages", pkgInfo.Provides, true)
+	builderWriteArray("Replaces packages", pkgInfo.Replaces, true)
+
+	// Split packages
 	if pkgInfo.Type == "source" && len(pkgInfo.SplitPackages) != 0 {
 		splitPkgs := make([]string, len(pkgInfo.SplitPackages))
 		for i, splitPkgInfo := range pkgInfo.SplitPackages {
 			splitPkgs[i] = splitPkgInfo.Name
 		}
-		appendArray("Split Packages", splitPkgs)
+		builderWriteArray("Split packages", splitPkgs, true)
 	}
-	if IsPackageInstalled(pkgInfo.Name, rootDir) && showInstallationReason {
-		installationReason := GetInstallationReason(pkgInfo.Name, rootDir)
+
+	// Installation reason
+	if rootDir != "" && IsPackageInstalled(pkgInfo.Name, rootDir) {
+		installationReason := GetPackage(pkgInfo.Name, rootDir).LocalInfo.GetInstallationReason()
 		var installationReasonString string
 		switch installationReason {
 		case InstallationReasonManual:
@@ -542,29 +659,23 @@ func CreateReadableInfo(showArchitecture, showType, showPackageRelations, showIn
 		default:
 			installationReasonString = "Unknown"
 		}
-		ret = append(ret, "Installation Reason: "+installationReasonString)
+		builder.WriteString("Installation reason: " + installationReasonString + "\n")
 	}
-	return strings.Join(ret, "\n")
+
+	return strings.TrimSpace(builder.String())
 }
 
 func extractPackage(bpmpkg *BPMPackage, verbose bool, filename, rootDir string) error {
-	if !IsPackageInstalled(bpmpkg.PkgInfo.Name, rootDir) {
-		err := executePackageScript(filename, rootDir, verbose, "pre_install.sh")
-		if err != nil {
-			log.Printf("Warning: %s\n", err)
-		}
-	} else {
-		err := executePackageScript(filename, rootDir, verbose, "pre_update.sh")
-		if err != nil {
-			log.Printf("Warning: %s\n", err)
-		}
-	}
 	seenHardlinks := make(map[string]string)
 	file, err := os.Open(filename)
 	if err != nil {
 		return err
 	}
 
+	// Initialize progress bar
+	bar := createProgressBar(bpmpkg.GetInstalledSize(), "Installing "+bpmpkg.PkgInfo.Name, verbose)
+	defer bar.Close()
+
 	tarballFile, err := readTarballFile(filename, "files.tar.gz")
 	if err != nil {
 		return err
@@ -576,6 +687,7 @@ func extractPackage(bpmpkg *BPMPackage, verbose bool, filename, rootDir string)
 		return err
 	}
 	packageFilesReader := tar.NewReader(archive)
+
 	for {
 		header, err := packageFilesReader.Next()
 		if err == io.EOF {
@@ -587,6 +699,17 @@ func extractPackage(bpmpkg *BPMPackage, verbose bool, filename, rootDir string)
 		extractFilename := path.Join(rootDir, header.Name)
 		switch header.Typeflag {
 		case tar.TypeDir:
+			// Check if path is set to be ignored
+			if ok := slices.ContainsFunc(MainBPMConfig.IgnorePaths, func(s string) bool {
+				matched, _ := filepath.Match(s, header.Name)
+				return matched
+			}); rootDir == "/" && ok {
+				if verbose {
+					fmt.Printf("Skipping Directory: %s (Path was ignored)\n", extractFilename)
+				}
+				continue
+			}
+
 			if _, err := os.Stat(extractFilename); err == nil {
 				if verbose {
 					fmt.Printf("Skipping Directory: %s (Directory already exists)\n", extractFilename)
@@ -612,7 +735,19 @@ func extractPackage(bpmpkg *BPMPackage, verbose bool, filename, rootDir string)
 			if verbose {
 				fmt.Printf("Created directory %s (%o)\n", extractFilename, header.Mode)
 			}
+			bar.Add64(header.Size)
 		case tar.TypeReg:
+			// Check if path is set to be ignored
+			if ok := slices.ContainsFunc(MainBPMConfig.IgnorePaths, func(s string) bool {
+				matched, _ := filepath.Match(s, header.Name)
+				return matched
+			}); rootDir == "/" && ok {
+				if verbose {
+					fmt.Printf("Skipping File: %s (Path was ignored)\n", extractFilename)
+				}
+				continue
+			}
+
 			skip := false
 			if _, err := os.Stat(extractFilename); err == nil {
 				for _, k := range bpmpkg.PkgInfo.Keep {
@@ -668,7 +803,19 @@ func extractPackage(bpmpkg *BPMPackage, verbose bool, filename, rootDir string)
 			if verbose {
 				fmt.Printf("Created File: %s (%o)\n", extractFilename, header.Mode)
 			}
+			bar.Add64(header.Size)
 		case tar.TypeSymlink:
+			// Check if path is set to be ignored
+			if ok := slices.ContainsFunc(MainBPMConfig.IgnorePaths, func(s string) bool {
+				matched, _ := filepath.Match(s, header.Name)
+				return matched
+			}); rootDir == "/" && ok {
+				if verbose {
+					fmt.Printf("Skipping Symlink: %s (Path was ignored)\n", extractFilename)
+				}
+				continue
+			}
+
 			err := os.Remove(extractFilename)
 			if err != nil && !os.IsNotExist(err) {
 				return err
@@ -682,7 +829,19 @@ func extractPackage(bpmpkg *BPMPackage, verbose bool, filename, rootDir string)
 			if verbose {
 				fmt.Println("Created Symlink: " + extractFilename + " -> " + header.Linkname)
 			}
+			bar.Add64(header.Size)
 		case tar.TypeLink:
+			// Check if path is set to be ignored
+			if ok := slices.ContainsFunc(MainBPMConfig.IgnorePaths, func(s string) bool {
+				matched, _ := filepath.Match(s, header.Name)
+				return matched
+			}); rootDir == "/" && ok {
+				if verbose {
+					fmt.Printf("Skipping Hard Link: %s (Path was ignored)\n", extractFilename)
+				}
+				continue
+			}
+
 			if verbose {
 				fmt.Println("Detected Hard Link: " + extractFilename + " -> " + path.Join(rootDir, strings.TrimPrefix(header.Linkname, "files/")))
 			}
@@ -691,6 +850,7 @@ func extractPackage(bpmpkg *BPMPackage, verbose bool, filename, rootDir string)
 			if err != nil && !os.IsNotExist(err) {
 				return err
 			}
+			bar.Add64(header.Size)
 		default:
 			return errors.New("unknown type (" + strconv.Itoa(int(header.Typeflag)) + ") in " + extractFilename)
 		}
@@ -710,7 +870,7 @@ func extractPackage(bpmpkg *BPMPackage, verbose bool, filename, rootDir string)
 	return nil
 }
 
-func installPackage(filename, rootDir string, verbose, force bool) error {
+func installPackage(filename string, installationReason InstallationReason, rootDir string, verbose, force bool) error {
 	if _, err := os.Stat(filename); os.IsNotExist(err) {
 		return err
 	}
@@ -725,6 +885,20 @@ func installPackage(filename, rootDir string, verbose, force bool) error {
 	}
 
 	packageInstalled := IsPackageInstalled(bpmpkg.PkgInfo.Name, rootDir)
+
+	// Run pre-* package scripts
+	if !packageInstalled {
+		err := executePackageScript(filename, rootDir, verbose, "pre_install.sh")
+		if err != nil {
+			log.Printf("Warning: %s\n", err)
+		}
+	} else {
+		err := executePackageScript(filename, rootDir, verbose, "pre_update.sh")
+		if err != nil {
+			log.Printf("Warning: %s\n", err)
+		}
+	}
+
 	// Check if package is installed and remove current files
 	if packageInstalled {
 		// Fetching and reversing package file entry list
@@ -743,26 +917,39 @@ func installPackage(filename, rootDir string, verbose, force bool) error {
 			fmt.Printf("Removing old files for package (%s)...\n", bpmpkg.PkgInfo.Name)
 		}
 		for _, entry := range fileEntries {
-			file := path.Join(rootDir, entry.Path)
-			stat, err := os.Lstat(file)
+			finalPath := path.Join(rootDir, entry.Path)
+
+			stat, err := os.Lstat(finalPath)
 			if os.IsNotExist(err) {
 				continue
-			}
-			if err != nil {
+			} else if err != nil {
 				return err
 			}
-			if len(files[entry.Path]) != 0 {
+
+			// Check if path is set to be ignored
+			if ok := slices.ContainsFunc(MainBPMConfig.IgnorePaths, func(s string) bool {
+				matched, _ := filepath.Match(s, entry.Path)
+				return matched
+			}); rootDir == "/" && ok {
 				if verbose {
-					fmt.Println("Skipping path: " + file + " (Path is managed by multiple packages)")
+					fmt.Printf("Skipping path: %s (Path was ignored)\n", finalPath)
 				}
 				continue
 			}
+
+			if len(files[entry.Path]) != 0 {
+				if verbose {
+					fmt.Println("Skipping path: " + finalPath + " (Path is managed by multiple packages)")
+				}
+				continue
+			}
+
 			shouldContinue := false
 			for _, value := range bpmpkg.PkgInfo.Keep {
 				if strings.HasSuffix(value, "/") {
 					if strings.HasPrefix(entry.Path, value) || entry.Path == strings.TrimSuffix(value, "/") {
 						if verbose {
-							fmt.Println("Skipping path: " + file + " (Path is set to be kept during reinstalls/updates)")
+							fmt.Println("Skipping path: " + finalPath + " (Path is set to be kept during reinstalls/updates)")
 						}
 						shouldContinue = true
 						continue
@@ -770,7 +957,7 @@ func installPackage(filename, rootDir string, verbose, force bool) error {
 				} else {
 					if entry.Path == value {
 						if verbose {
-							fmt.Println("Skipping path: " + file + " (Path is set to be kept during reinstalls/updates)")
+							fmt.Println("Skipping path: " + finalPath + " (Path is set to be kept during reinstalls/updates)")
 						}
 						shouldContinue = true
 						continue
@@ -782,37 +969,37 @@ func installPackage(filename, rootDir string, verbose, force bool) error {
 			}
 			if stat.Mode()&os.ModeSymlink != 0 {
 				if verbose {
-					fmt.Println("Removing: " + file)
+					fmt.Println("Removing: " + finalPath)
 				}
-				err := os.Remove(file)
+				err := os.Remove(finalPath)
 				if err != nil {
 					return err
 				}
 				continue
 			}
 			if stat.IsDir() {
-				dir, err := os.ReadDir(file)
+				dir, err := os.ReadDir(finalPath)
 				if err != nil {
 					return err
 				}
 				if len(dir) != 0 {
 					if verbose {
-						fmt.Println("Skipping non-empty directory: " + file)
+						fmt.Println("Skipping non-empty directory: " + finalPath)
 					}
 					continue
 				}
 				if verbose {
-					fmt.Println("Removing: " + file)
+					fmt.Println("Removing: " + finalPath)
 				}
-				err = os.Remove(file)
+				err = os.Remove(finalPath)
 				if err != nil {
 					return err
 				}
 			} else {
 				if verbose {
-					fmt.Println("Removing: " + file)
+					fmt.Println("Removing: " + finalPath)
 				}
-				err := os.Remove(file)
+				err := os.Remove(finalPath)
 				if err != nil {
 					return err
 				}
@@ -880,6 +1067,16 @@ func installPackage(filename, rootDir string, verbose, force bool) error {
 		return err
 	}
 
+	// Write local package information
+	localInfo := getPackageLocalInfo(bpmpkg.PkgInfo.Name, rootDir)
+	if !packageInstalled {
+		localInfo.InstalledOn = time.Now().Unix()
+	}
+	localInfo.LastUpdatedOn = time.Now().Unix()
+	localInfo.InstallationReason = string(installationReason)
+
+	SetPackageLocalInfo(bpmpkg.PkgInfo.Name, localInfo, rootDir)
+
 	// Save remove package scripts
 	packageScripts, err := ReadPackageScripts(filename)
 	if err != nil {
@@ -906,6 +1103,7 @@ func installPackage(filename, rootDir string, verbose, force bool) error {
 		f.Close()
 	}
 
+	// Run post-* package scripts
 	if !packageInstalled {
 		err = executePackageScript(filename, rootDir, verbose, "post_install.sh")
 		if err != nil {
@@ -918,14 +1116,22 @@ func installPackage(filename, rootDir string, verbose, force bool) error {
 		}
 	}
 
+	// Write persistent data version number
+	if _, err := os.Stat(path.Join(rootDir, "var/lib/bpm/.version")); err != nil {
+		err = os.WriteFile(path.Join(rootDir, "var/lib/bpm/.version"), []byte(strconv.Itoa(persistentDataVersion)), 0644)
+		if err != nil {
+			return err
+		}
+	}
+
 	// Ensure local package information has been initialized for rootDir
-	err = initializeLocalPackageInformation(rootDir)
+	err = InitializeLocalPackageInformation(rootDir)
 	if err != nil {
 		return err
 	}
 
 	// Add or update package information for rootDir
-	localPackageInformation[rootDir][bpmpkg.PkgInfo.Name] = bpmpkg
+	localPackageInformation[rootDir][bpmpkg.PkgInfo.Name] = bpmpkg.PkgInfo
 
 	return nil
 }
@@ -943,8 +1149,11 @@ func removePackage(pkg string, verbose bool, rootDir string) error {
 		log.Printf("Warning: %s\n", err)
 	}
 
+	// Get BPM package
+	bpmpkg := GetPackage(pkg, rootDir)
+
 	// Fetching and reversing package file entry list
-	fileEntries := GetPackage(pkg, rootDir).PkgFiles
+	fileEntries := bpmpkg.PkgFiles
 	sort.Slice(fileEntries, func(i, j int) bool {
 		return fileEntries[i].Path < fileEntries[j].Path
 	})
@@ -954,33 +1163,50 @@ func removePackage(pkg string, verbose bool, rootDir string) error {
 		return err
 	}
 
+	bar := createProgressBar(bpmpkg.GetInstalledSize(), "Removing "+bpmpkg.PkgInfo.Name, verbose)
+	defer bar.Close()
+
 	// Removing package files
 	for _, entry := range fileEntries {
-		file := path.Join(rootDir, entry.Path)
-		lstat, err := os.Lstat(file)
+		bar.Add64(entry.SizeInBytes)
+
+		finalPath := path.Join(rootDir, entry.Path)
+
+		lstat, err := os.Lstat(finalPath)
 		if os.IsNotExist(err) {
 			continue
-		}
-		if err != nil {
+		} else if err != nil {
 			return err
 		}
+
+		// Check if path is set to be ignored
+		if ok := slices.ContainsFunc(MainBPMConfig.IgnorePaths, func(s string) bool {
+			matched, _ := filepath.Match(s, entry.Path)
+			return matched
+		}); rootDir == "/" && ok {
+			if verbose {
+				fmt.Printf("Skipping path: %s (Path was ignored)\n", finalPath)
+			}
+			continue
+		}
+
 		if len(files[entry.Path]) != 0 {
 			if verbose {
-				fmt.Println("Skipping path: " + file + "(Path is managed by multiple packages)")
+				fmt.Println("Skipping path: " + finalPath + "(Path is managed by multiple packages)")
 			}
 			continue
 		}
 		if lstat.Mode()&os.ModeSymlink != 0 {
 			if verbose {
-				fmt.Println("Removing: " + file)
+				fmt.Println("Removing: " + finalPath)
 			}
-			err := os.Remove(file)
+			err := os.Remove(finalPath)
 			if err != nil {
 				return err
 			}
 			continue
 		}
-		stat, err := os.Stat(file)
+		stat, err := os.Stat(finalPath)
 		if os.IsNotExist(err) {
 			continue
 		}
@@ -988,28 +1214,28 @@ func removePackage(pkg string, verbose bool, rootDir string) error {
 			return err
 		}
 		if stat.IsDir() {
-			dir, err := os.ReadDir(file)
+			dir, err := os.ReadDir(finalPath)
 			if err != nil {
 				return err
 			}
 			if len(dir) != 0 {
 				if verbose {
-					fmt.Println("Skipping non-empty directory: " + file)
+					fmt.Println("Skipping non-empty directory: " + finalPath)
 				}
 				continue
 			}
 			if verbose {
-				fmt.Println("Removing: " + file)
+				fmt.Println("Removing: " + finalPath)
 			}
-			err = os.Remove(file)
+			err = os.Remove(finalPath)
 			if err != nil {
 				return err
 			}
 		} else {
 			if verbose {
-				fmt.Println("Removing: " + file)
+				fmt.Println("Removing: " + finalPath)
 			}
-			err := os.Remove(file)
+			err := os.Remove(finalPath)
 			if err != nil {
 				return err
 			}
@@ -1032,7 +1258,7 @@ func removePackage(pkg string, verbose bool, rootDir string) error {
 	}
 
 	// Ensure local package information has been initialized for rootDir
-	err = initializeLocalPackageInformation(rootDir)
+	err = InitializeLocalPackageInformation(rootDir)
 	if err != nil {
 		return err
 	}

src/bpmlib/utils.go

@@ -2,10 +2,58 @@ package bpmlib
 
 import (
 	"fmt"
+	"io"
 	"math"
+	"os"
+	"path"
 	"syscall"
+	"time"
+
+	version "github.com/knqyf263/go-rpm-version"
+	"github.com/schollz/progressbar/v3"
 )
 
+type BPMLock struct {
+	file *os.File
+	path string
+}
+
+func LockBPM(rootDir string) (*BPMLock, error) {
+	// Create cache directory if it doesn't already exist
+	err := os.MkdirAll(path.Join(rootDir, "/var/cache/bpm"), 0755)
+	if err != nil {
+		return nil, err
+	}
+
+	// Create file
+	f, err := os.Create(path.Join(rootDir, "var/cache/bpm/bpm.lock"))
+	if err != nil {
+		return nil, err
+	}
+
+	// Get exclusive file lock on file
+	err = syscall.Flock(int(f.Fd()), syscall.LOCK_EX|syscall.LOCK_NB)
+	if err != nil {
+		return nil, err
+	}
+
+	return &BPMLock{f, path.Join(rootDir, "var/cache/bpm/bpm.lock")}, nil
+}
+
+func (lock *BPMLock) Unlock() error {
+	err := lock.file.Close()
+	if err != nil {
+		return err
+	}
+
+	err = os.Remove(lock.path)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
 func GetArch() string {
 	uname := syscall.Utsname{}
 	err := syscall.Uname(&uname)
@@ -21,6 +69,47 @@ func GetArch() string {
 	return string(byteString[:indexLength])
 }
 
+func CompareVersions(version1, version2 string) int {
+	v1 := version.NewVersion(version1)
+	v2 := version.NewVersion(version2)
+
+	return v1.Compare(v2)
+}
+
+func createProgressBar(max int64, description string, hideBar bool) *progressbar.ProgressBar {
+	var output io.Writer
+	if hideBar {
+		output = io.Discard
+	} else {
+		output = os.Stderr
+	}
+
+	if len(description) < 40 {
+		for i := len(description); i < 40; i++ {
+			description += " "
+		}
+	}
+	if len(description) > 40 {
+		overflow := len(description) - 37
+		description = description[:len(description)-overflow] + "..."
+	}
+
+	return progressbar.NewOptions64(max,
+		progressbar.OptionSetDescription(description),
+		progressbar.OptionSetWriter(output),
+		progressbar.OptionShowBytes(true),
+		progressbar.OptionShowTotalBytes(true),
+		progressbar.OptionSetWidth(20),
+		progressbar.OptionThrottle(65*time.Millisecond),
+		progressbar.OptionShowCount(),
+		progressbar.OptionOnCompletion(func() {
+			fmt.Fprint(output, "\n")
+		}),
+		progressbar.OptionSpinnerType(14),
+		progressbar.OptionSetRenderBlankState(true),
+		progressbar.OptionSetTheme(progressbar.ThemeASCII))
+}
+
 func stringSliceRemove(s []string, r string) []string {
 	for i, v := range s {
 		if v == r {
@@ -30,7 +119,7 @@ func stringSliceRemove(s []string, r string) []string {
 	return s
 }
 
-func unsignedBytesToHumanReadable(b uint64) string {
+func BytesToHumanReadable(b int64) string {
 	bf := float64(b)
 	for _, unit := range []string{"", "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi"} {
 		if math.Abs(bf) < 1024.0 {
@@ -41,13 +130,14 @@ func unsignedBytesToHumanReadable(b uint64) string {
 	return fmt.Sprintf("%.1fYiB", bf)
 }
 
-func bytesToHumanReadable(b int64) string {
-	bf := float64(b)
-	for _, unit := range []string{"", "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi"} {
-		if math.Abs(bf) < 1024.0 {
-			return fmt.Sprintf("%3.1f%sB", bf, unit)
+func removeDuplicates[T comparable](sliceList []T) []T {
+	allKeys := make(map[T]bool)
+	list := []T{}
+	for _, item := range sliceList {
+		if _, value := allKeys[item]; !value {
+			allKeys[item] = true
+			list = append(list, item)
 		}
-		bf /= 1024.0
 	}
-	return fmt.Sprintf("%.1fYiB", bf)
+	return list
 }