+ return nil
+}
+
+func mainConvert(typ, srcPath, dstPath string) error {
+ var t FileType
+ err := t.UnmarshalText([]byte(typ))
+ if err != nil {
+ return err
+ }
+
+ src, err := ioutil.ReadFile(srcPath)
+ if err != nil {
+ return err
+ }
+ var x bytes.Buffer
+ if t == FileTypePlain {
+ x.Write(src)
+ } else if t == FileTypePasswd {
+ pws, err := ParsePasswds(bytes.NewReader(src))
+ if err != nil {
+ return err
+ }
+ err = SerializePasswds(&x, pws)
+ if err != nil {
+ return err
+ }
+ } else if t == FileTypeGroup {
+ grs, err := ParseGroups(bytes.NewReader(src))
+ if err != nil {
+ return err
+ }
+ err = SerializeGroups(&x, grs)
+ if err != nil {
+ return err
+ }
+ } else {
+ return fmt.Errorf("unsupported file type %v", t)
+ }
+
+ // We must create the file first or deployFile() will abort; this is
+ // ugly because deployFile() already performs an atomic replacement
+ // but the simplest solution with the least duplicate code
+ f, err := renameio.TempFile(filepath.Dir(dstPath), dstPath)
+ if err != nil {
+ return err
+ }
+ defer f.Cleanup()