Improved error message for remote version package output

docs/content/config/hosts.md

@@ -21,4 +21,4 @@ description: >
 
 ## exec host subcommand
 
-Backy has a subcommand `exec host`. This subcommand takes the flags of `-m host1 -m host2`. For now these hosts need to be defined in the config file.
+Backy has a subcommand `exec host`. This subcommand takes the flags of `-m host1 -m host2`. The commands can also be specified by `-c command1 -c command2`.

docs/content/getting-started/config.md

@@ -124,9 +124,9 @@ notifications:
 
 ### Logging
 
-cmd-std-out controls whether commands output is echoed to StdOut.
+`cmd-std-out` controls whether commands output is echoed to StdOut.
 
-If logfile is not defined, the log file will be written to the config directory in the file `backy.log`.
+If `logfile` is not defined, the log file will be written to the config directory in the file `backy.log`.
 
 `console-disabled` controls whether the logging messages are echoed to StdOut. Default is false.
 

pkg/backy/utils.go

@@ -333,11 +333,12 @@ func getCommandTypeAndSetCommandInfo(command *Command) *Command {
 
 func parsePackageVersion(output string, cmdCtxLogger zerolog.Logger, command *Command, cmdOutBuf bytes.Buffer) ([]string, error) {
 
+	var err error
 	var errs []error
-	pkgVersionOnSystem, errs := command.pkgMan.ParseRemotePackageManagerVersionOutput(output)
+	pkgVersionOnSystem, err := command.pkgMan.ParseRemotePackageManagerVersionOutput(output)
-	if errs != nil {
+	if err != nil {
-		cmdCtxLogger.Error().Errs("Error parsing package version output", errs).Send()
+		cmdCtxLogger.Error().AnErr("Error parsing package version output", err).Send()
-		return collectOutput(&cmdOutBuf, command.Name, cmdCtxLogger, command.Output.ToLog), fmt.Errorf("error parsing package version output: %v", errs)
+		return collectOutput(&cmdOutBuf, command.Name, cmdCtxLogger, command.Output.ToLog), fmt.Errorf("error parsing package version output: %v", err)
 	}
 
 	for _, p := range pkgVersionOnSystem {

pkg/pkgman/apt/apt.go

@@ -109,7 +109,7 @@ func (a *AptManager) SetAuthCommand(authCommand string) {
 }
 
 // Parse parses the apt-cache policy output to extract Installed and Candidate versions.
-func (a *AptManager) ParseRemotePackageManagerVersionOutput(output string) ([]packagemanagercommon.Package, []error) {
+func (a *AptManager) ParseRemotePackageManagerVersionOutput(output string) ([]packagemanagercommon.Package, error) {
 	var (
 		packageName        string
 		installedString    string
@@ -118,11 +118,12 @@ func (a *AptManager) ParseRemotePackageManagerVersionOutput(output string) ([]pa
 	)
 	// Check for error message in the output
 	if strings.Contains(output, "Unable to locate package") {
-		return nil, []error{fmt.Errorf("error: %s", strings.TrimSpace(output))}
+		return nil, fmt.Errorf("error: %s", strings.TrimSpace(output))
 	}
 	packages := []packagemanagercommon.Package{}
 	outputBuf := bytes.NewBufferString(output)
 	outputScan := bufio.NewScanner(outputBuf)
+	var packageCount uint
 	for outputScan.Scan() {
 		line := outputScan.Text()
 		if !strings.HasPrefix(line, "  ") && strings.HasSuffix(line, ":") {
@@ -141,6 +142,8 @@ func (a *AptManager) ParseRemotePackageManagerVersionOutput(output string) ([]pa
 
 		if countRelevantLines == 2 {
 			countRelevantLines = 0
+			if !strings.Contains(installedString, " (none)") {
+				packageCount++
 				packages = append(packages, packagemanagercommon.Package{
 					Name: packageName,
 					VersionCheck: packagemanagercommon.PackageVersion{
@@ -151,6 +154,11 @@ func (a *AptManager) ParseRemotePackageManagerVersionOutput(output string) ([]pa
 				)
 			}
 		}
+	}
+
+	if packageCount == 0 {
+		return nil, fmt.Errorf("no packages found")
+	}
 
 	return packages, nil
 }

pkg/pkgman/dnf/dnf.go

@@ -92,11 +92,11 @@ func (d *DnfManager) CheckVersion(pkgs []packagemanagercommon.Package) (string,
 }
 
 // Parse parses the dnf info output to extract Installed and Candidate versions.
-func (d DnfManager) ParseRemotePackageManagerVersionOutput(output string) ([]packagemanagercommon.Package, []error) {
+func (d DnfManager) ParseRemotePackageManagerVersionOutput(output string) ([]packagemanagercommon.Package, error) {
 
 	// Check for error message in the output
 	if strings.Contains(output, "No matching packages to list") {
-		return nil, []error{fmt.Errorf("error: package not listed")}
+		return nil, fmt.Errorf("error: package not listed")
 	}
 
 	// Define regular expressions to capture installed and available versions
@@ -118,7 +118,7 @@ func (d DnfManager) ParseRemotePackageManagerVersionOutput(output string) ([]pac
 	}
 
 	if installedVersion == "" && candidateVersion == "" {
-		return nil, []error{fmt.Errorf("failed to parse versions from dnf output")}
+		return nil, fmt.Errorf("failed to parse versions from dnf output")
 	}
 
 	return nil, nil

pkg/pkgman/pkgman.go

@@ -16,7 +16,7 @@ type PackageManager interface {
 	Upgrade(pkgs []packagemanagercommon.Package) (string, []string) // Upgrade a specific package
 	UpgradeAll() (string, []string)
 	CheckVersion(pkgs []packagemanagercommon.Package) (string, []string)
-	ParseRemotePackageManagerVersionOutput(output string) ([]packagemanagercommon.Package, []error)
+	ParseRemotePackageManagerVersionOutput(output string) ([]packagemanagercommon.Package, error)
 	// Configure applies functional options to customize the package manager.
 	Configure(options ...packagemanagercommon.PackageManagerOption)
 }

pkg/pkgman/yum/yum.go

@@ -90,11 +90,11 @@ func (y *YumManager) CheckVersion(pkgs []packagemanagercommon.Package) (string,
 }
 
 // Parse parses the dnf info output to extract Installed and Candidate versions.
-func (y YumManager) ParseRemotePackageManagerVersionOutput(output string) ([]packagemanagercommon.Package, []error) {
+func (y YumManager) ParseRemotePackageManagerVersionOutput(output string) ([]packagemanagercommon.Package, error) {
 
 	// Check for error message in the output
 	if strings.Contains(output, "No matching packages to list") {
-		return nil, []error{fmt.Errorf("error: package not listed")}
+		return nil, fmt.Errorf("error: package not listed")
 	}
 
 	// Define regular expressions to capture installed and available versions
@@ -116,7 +116,7 @@ func (y YumManager) ParseRemotePackageManagerVersionOutput(output string) ([]pac
 	}
 
 	if installedVersion == "" && candidateVersion == "" {
-		return nil, []error{fmt.Errorf("failed to parse versions from dnf output")}
+		return nil, fmt.Errorf("failed to parse versions from dnf output")
 	}
 
 	return nil, nil

tests/packageCommands.yml

@@ -8,6 +8,14 @@ commands:
     packageManager: apt
     packageOperation: checkVersion
 
+  checkAptNoVersion:
+    type: package
+    shell: zsh
+    packages: 
+      - name: "apt"
+    packageManager: apt
+    packageOperation: checkVersion
+
   checkDockerPartialVersionWithoutRegex:
     type: package
     shell: zsh
@@ -51,3 +59,6 @@ cmdLists:
       - checkDockerPartialVersionWithRegex
       - checkDockerVersionWithInvalidRegex
       - checkDockerNoVersion
+
+logging:
+  verbose: true