Remove all log.Fatal and os.Exit calls from bpmlib

src/bpm/main.go

@@ -43,7 +43,10 @@ var doCleanup = false
 var showRepoInfo = false
 
 func main() {
-	bpmlib.ReadConfig()
+	err := bpmlib.ReadConfig()
+	if err != nil {
+		log.Fatalf("Error: could not read BPM config: %s", err)
+	}
 	resolveFlags()
 	resolveCommand()
 }
@@ -244,6 +247,12 @@ func resolveCommand() {
 			log.Fatalf("Error: could not setup operation: %s\n", err)
 		}
 
+		// Exit if operation contains no actions
+		if len(operation.Actions) == 0 {
+			fmt.Println("No action needs to be taken")
+			return
+		}
+
 		// Show operation summary
 		operation.ShowOperationSummary()
 
@@ -289,6 +298,12 @@ func resolveCommand() {
 			log.Fatalf("Error: could not setup operation: %s\n", err)
 		}
 
+		// Exit if operation contains no actions
+		if len(operation.Actions) == 0 {
+			fmt.Println("No action needs to be taken")
+			return
+		}
+
 		// Show operation summary
 		operation.ShowOperationSummary()
 
@@ -358,6 +373,12 @@ func resolveCommand() {
 			log.Fatalf("Error: could not setup operation: %s\n", err)
 		}
 
+		// Exit if operation contains no actions
+		if len(operation.Actions) == 0 {
+			fmt.Println("No action needs to be taken")
+			return
+		}
+
 		// Show operation summary
 		operation.ShowOperationSummary()
 
@@ -398,6 +419,12 @@ func resolveCommand() {
 			log.Fatalf("Error: could not setup operation: %s\n", err)
 		}
 
+		// Exit if operation contains no actions
+		if len(operation.Actions) == 0 {
+			fmt.Println("No action needs to be taken")
+			return
+		}
+
 		// Show operation summary
 		operation.ShowOperationSummary()
 

src/bpmlib/config.go

@@ -2,7 +2,6 @@ package bpmlib
 
 import (
 	"gopkg.in/yaml.v3"
-	"log"
 	"os"
 )
 
@@ -17,14 +16,16 @@ type BPMConfigStruct struct {
 
 var BPMConfig BPMConfigStruct
 
-func ReadConfig() {
+func ReadConfig() (err error) {
-	if _, err := os.Stat("/etc/bpm.conf"); os.IsNotExist(err) {
+	if _, err = os.Stat("/etc/bpm.conf"); os.IsNotExist(err) {
-		log.Fatal(err)
+		return err
 	}
+
 	bytes, err := os.ReadFile("/etc/bpm.conf")
 	if err != nil {
-		log.Fatal(err)
+		return err
 	}
+
 	BPMConfig = BPMConfigStruct{
 		CompilationEnv:    make([]string, 0),
 		SilentCompilation: false,
@@ -33,19 +34,23 @@ func ReadConfig() {
 	}
 	err = yaml.Unmarshal(bytes, &BPMConfig)
 	if err != nil {
-		log.Fatal(err)
+		return err
 	}
+
 	for i := len(BPMConfig.Repositories) - 1; i >= 0; i-- {
 		if BPMConfig.Repositories[i].Disabled != nil && *BPMConfig.Repositories[i].Disabled {
 			BPMConfig.Repositories = append(BPMConfig.Repositories[:i], BPMConfig.Repositories[i+1:]...)
 		}
 	}
+
 	for _, repo := range BPMConfig.Repositories {
 		repo.Entries = make(map[string]*RepositoryEntry)
 		repo.VirtualPackages = make(map[string][]string)
 		err := repo.ReadLocalDatabase()
 		if err != nil {
-			log.Fatal(err)
+			return err
 		}
 	}
+
+	return nil
 }

src/bpmlib/general.go

@@ -179,7 +179,10 @@ func UpdatePackages(rootDir string, syncDatabase bool, installOptionalDependenci
 	}
 
 	// Reload config and local databases
-	ReadConfig()
+	err = ReadConfig()
+	if err != nil {
+		return nil, fmt.Errorf("could not read BPM config: %s", err)
+	}
 
 	// Get installed packages and check for updates
 	pkgs, err := GetInstalledPackages(rootDir)

src/bpmlib/operations.go

@@ -195,7 +195,7 @@ func (operation *BPMOperation) Cleanup(verbose bool) error {
 	// Get all installed packages
 	installedPackageNames, err := GetInstalledPackages(operation.RootDir)
 	if err != nil {
-		log.Fatalf("Error: could not get installed packages: %s\n", err)
+		return fmt.Errorf("could not get installed packages: %s", err)
 	}
 	installedPackages := make([]*PackageInfo, len(installedPackageNames))
 	for i, value := range installedPackageNames {
@@ -329,8 +329,8 @@ func (operation *BPMOperation) CheckForConflicts() (map[string][]string, error)
 
 func (operation *BPMOperation) ShowOperationSummary() {
 	if len(operation.Actions) == 0 {
-		fmt.Println("All packages are up to date!")
+		fmt.Println("No action needs to be taken")
-		os.Exit(0)
+		return
 	}
 
 	for _, value := range operation.Actions {
@@ -348,9 +348,6 @@ func (operation *BPMOperation) ShowOperationSummary() {
 		installedInfo := GetPackageInfo(pkgInfo.Name, operation.RootDir)
 		sourceInfo := ""
 		if pkgInfo.Type == "source" {
-			if operation.RootDir != "/" {
-				log.Fatalf("cannot compile and install source packages to a different root directory")
-			}
 			sourceInfo = "(From Source)"
 		}