Preserve cache data from deletion during uninstall

cmd/install.go

@@ -87,6 +87,7 @@ var installCmd = &cobra.Command{
 			NoDeps:                      nodeps,
 			Force:                       force,
 			OnlyDeps:                    onlydeps,
+			PreserveSystemEssentialData: true,
 		})
 		inst.Repositories(repos)
 

pkg/installer/installer.go

@@ -21,6 +21,7 @@ import (
 	"os/exec"
 	"path/filepath"
 	"sort"
+	"strings"
 	"sync"
 
 	"github.com/ghodss/yaml"
@@ -41,6 +42,7 @@ type LuetInstallerOptions struct {
 	NoDeps                      bool
 	OnlyDeps                    bool
 	Force                       bool
+	PreserveSystemEssentialData bool
 }
 
 type LuetInstaller struct {
@@ -375,7 +377,15 @@ func (l *LuetInstaller) uninstall(p pkg.Package, s *System) error {
 	// Remove from target
 	for _, f := range files {
 		target := filepath.Join(s.Target, f)
-		Info("Removing", target)
+		Debug("Removing", target)
+
+		if l.Options.PreserveSystemEssentialData &&
+			strings.HasPrefix(f, config.LuetCfg.GetSystem().GetSystemPkgsCacheDirPath()) ||
+			strings.HasPrefix(f, config.LuetCfg.GetSystem().GetSystemRepoDatabaseDirPath()) {
+			Warning("Preserve ", f, " which is required by luet ( you have to delete it manually if you really need to)")
+			continue
+		}
+
 		err := os.Remove(target)
 		if err != nil {
 			Warning("Failed removing file (not present in the system target ?)", target)