Move some functions to gitrepo package (#35543)

Refactor Git command functions to use WithXXX methods instead of
exposing RunOpts.
This change simplifies reuse across gitrepo and improves consistency,
encapsulation, and maintainability of command options.

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

services/pull/patch_unmerged.go

@@ -73,48 +73,47 @@ func readUnmergedLsFileLines(ctx context.Context, tmpBasePath string, outputChan
 
 	stderr := &strings.Builder{}
 	err = gitcmd.NewCommand("ls-files", "-u", "-z").
-		Run(ctx, &gitcmd.RunOpts{
-			Dir:    tmpBasePath,
-			Stdout: lsFilesWriter,
-			Stderr: stderr,
-			PipelineFunc: func(_ context.Context, _ context.CancelFunc) error {
-				_ = lsFilesWriter.Close()
-				defer func() {
-					_ = lsFilesReader.Close()
-				}()
-				bufferedReader := bufio.NewReader(lsFilesReader)
+		WithDir(tmpBasePath).
+		WithStdout(lsFilesWriter).
+		WithStderr(stderr).
+		WithPipelineFunc(func(_ context.Context, _ context.CancelFunc) error {
+			_ = lsFilesWriter.Close()
+			defer func() {
+				_ = lsFilesReader.Close()
+			}()
+			bufferedReader := bufio.NewReader(lsFilesReader)
 
-				for {
-					line, err := bufferedReader.ReadString('\000')
-					if err != nil {
-						if err == io.EOF {
-							return nil
-						}
-						return err
+			for {
+				line, err := bufferedReader.ReadString('\000')
+				if err != nil {
+					if err == io.EOF {
+						return nil
 					}
-					toemit := &lsFileLine{}
-
-					split := strings.SplitN(line, " ", 3)
-					if len(split) < 3 {
-						return fmt.Errorf("malformed line: %s", line)
-					}
-					toemit.mode = split[0]
-					toemit.sha = split[1]
-
-					if len(split[2]) < 4 {
-						return fmt.Errorf("malformed line: %s", line)
-					}
-
-					toemit.stage, err = strconv.Atoi(split[2][0:1])
-					if err != nil {
-						return fmt.Errorf("malformed line: %s", line)
-					}
-
-					toemit.path = split[2][2 : len(split[2])-1]
-					outputChan <- toemit
+					return err
 				}
-			},
-		})
+				toemit := &lsFileLine{}
+
+				split := strings.SplitN(line, " ", 3)
+				if len(split) < 3 {
+					return fmt.Errorf("malformed line: %s", line)
+				}
+				toemit.mode = split[0]
+				toemit.sha = split[1]
+
+				if len(split[2]) < 4 {
+					return fmt.Errorf("malformed line: %s", line)
+				}
+
+				toemit.stage, err = strconv.Atoi(split[2][0:1])
+				if err != nil {
+					return fmt.Errorf("malformed line: %s", line)
+				}
+
+				toemit.path = split[2][2 : len(split[2])-1]
+				outputChan <- toemit
+			}
+		}).
+		Run(ctx)
 	if err != nil {
 		outputChan <- &lsFileLine{err: fmt.Errorf("git ls-files -u -z: %w", gitcmd.ConcatenateError(err, stderr.String()))}
 	}