Improve database entry querying

src/bpm/main.go

@@ -185,9 +185,6 @@ func showPackageInfo() {
 	}
 
 	for n, pkg := range packages {
-		var info *bpmlib.PackageInfo
-		isFile := false
-		showInstallationReason := false
 		if showDatabaseInfo {
 			var err error
 			var entry *bpmlib.BPMDatabaseEntry
@@ -199,8 +196,19 @@ func showPackageInfo() {
 					return
 				}
 			}
-			info = entry.Info
-		} else if stat, err := os.Stat(pkg); err == nil && !stat.IsDir() {
+
+			if n != 0 {
+				fmt.Println()
+			}
+			fmt.Println(entry.CreateReadableInfo(rootDir))
+
+			return
+		}
+
+		var info *bpmlib.PackageInfo
+		isFile := false
+		showInstallationReason := false
+		if stat, err := os.Stat(pkg); err == nil && !stat.IsDir() {
 			bpmpkg, err := bpmlib.ReadPackage(pkg)
 			if err != nil {
 				log.Printf("Error: could not read package: %s\n", err)

src/bpmlib/databases.go

@@ -3,6 +3,7 @@ package bpmlib
 import (
 	"errors"
 	"fmt"
+	"maps"
 	"net/url"
 	"os"
 	"path"
@@ -16,6 +17,7 @@ type BPMDatabase struct {
 	DatabaseVersion int                          `yaml:"database_version"`
 	Entries         map[string]*BPMDatabaseEntry `yaml:"entries"`
 	VirtualPackages map[string][]string
+	Name            string
 	Source          string
 }
 
@@ -54,6 +56,7 @@ func (db *configDatabase) ReadLocalDatabase() error {
 
 	// Initialize struct values
 	database.VirtualPackages = make(map[string][]string)
+	database.Name = db.Name
 	database.Source = db.Source
 
 	entriesToRemove := make([]string, 0)
@@ -247,3 +250,94 @@ func (db *BPMDatabase) FetchPackage(pkg string) (string, error) {
 
 	return path.Join("/var/cache/bpm/fetched/", path.Base(entry.Filepath)), nil
 }
+
+func (entry *BPMDatabaseEntry) GetEntryDependants() (dependants []string) {
+	dependantsMap := make(map[string][]string)
+	for _, db := range BPMDatabases {
+		for _, e := range db.Entries {
+			if slices.Contains(e.Info.Depends, 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) string {
+	ret := make([]string, 0)
+	appendArray := func(label string, array []string, sort bool) {
+		if len(array) == 0 {
+			return
+		}
+
+		if sort {
+			// Sort array
+			slices.Sort(array)
+		}
+
+		ret = append(ret, fmt.Sprintf("%s: %s", label, strings.Join(array, ", ")))
+	}
+
+	ret = append(ret, "Name: "+entry.Info.Name)
+	ret = append(ret, "Database: "+entry.Database.Name)
+	ret = append(ret, "Description: "+entry.Info.Description)
+	ret = append(ret, "Version: "+entry.Info.GetFullVersion())
+	ret = append(ret, "URL: "+entry.Info.Url)
+	ret = append(ret, "License: "+entry.Info.License)
+	ret = append(ret, "Architecture: "+entry.Info.Arch)
+	ret = append(ret, "Type: "+entry.Info.Type)
+	appendArray("Dependencies", entry.Info.Depends, true)
+	if entry.Info.Type == "source" {
+		appendArray("Make Dependencies", entry.Info.MakeDepends, true)
+	}
+	appendArray("Optional dependencies", entry.Info.OptionalDepends, true)
+	dependants := entry.GetEntryDependants()
+	if len(dependants) > 0 {
+		appendArray("Dependant packages", dependants, false)
+	}
+	appendArray("Conflicting packages", entry.Info.Conflicts, true)
+	appendArray("Provided packages", entry.Info.Provides, true)
+	appendArray("Replaces packages", entry.Info.Replaces, true)
+
+	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
+		}
+		appendArray("Split Packages", splitPkgs, true)
+	}
+
+	if rootDir != "" && IsPackageInstalled(entry.Info.Name, rootDir) {
+		installationReason := GetInstallationReason(entry.Info.Name, rootDir)
+		var installationReasonString string
+		switch installationReason {
+		case InstallationReasonManual:
+			installationReasonString = "Manual"
+		case InstallationReasonDependency:
+			installationReasonString = "Dependency"
+		case InstallationReasonMakeDependency:
+			installationReasonString = "Make dependency"
+		default:
+			installationReasonString = "Unknown"
+		}
+		ret = append(ret, "Installation Reason: "+installationReasonString)
+	}
+	return strings.Join(ret, "\n")
+}