Refactor component/extras into snapshotting

internal/component/snapshots/extras_config.go

@@ -0,0 +1,43 @@
+package snapshots
+
+import (
+	"path/filepath"
+
+	"github.com/FAU-CDI/wisski-distillery/internal/component"
+)
+
+// Config implements backing up configuration
+type Config struct {
+	component.ComponentBase
+}
+
+func (Config) Name() string { return "config" }
+
+func (*Config) BackupName() string {
+	return "config"
+}
+
+func (control *Config) Backup(context component.StagingContext) error {
+	files := control.backupFiles()
+
+	return context.AddDirectory("", func() error {
+		for _, src := range files {
+			name := filepath.Base(src)
+			if err := context.CopyFile(name, src); err != nil {
+				return err
+			}
+		}
+		return nil
+	})
+}
+
+// backupfiles lists the files to be backed up.
+func (control *Config) backupFiles() []string {
+	return []string{
+		control.Config.ConfigPath,
+		control.Config.ExecutablePath(),
+		control.Config.SelfOverridesFile,
+		control.Config.SelfResolverBlockFile,
+		control.Config.GlobalAuthorizedKeysFile,
+	}
+}