Fix mirror bug (#33224) (#33225)

Backport #33224 by lunny

Fix #33200

Co-authored-by: Lunny Xiao <[email protected]>
Co-authored-by: wxiaoguang <[email protected]>

Author: 3 people

modules/git/ref_test.go

@@ -20,6 +20,8 @@ func TestRefName(t *testing.T) {
 
 	// Test pull names
 	assert.Equal(t, "1", RefName("refs/pull/1/head").PullName())
+	assert.True(t, RefName("refs/pull/1/head").IsPull())
+	assert.True(t, RefName("refs/pull/1/merge").IsPull())
 	assert.Equal(t, "my/pull", RefName("refs/pull/my/pull/head").PullName())
 
 	// Test for branch names

services/mirror/mirror_pull.go

@@ -97,6 +97,7 @@ type mirrorSyncResult struct {
 /*
 // * [new tag]         v0.1.8     -> v0.1.8
 // * [new branch]      master     -> origin/master
+// * [new ref]         refs/pull/2/head  -> refs/pull/2/head"
 // - [deleted]         (none)     -> origin/test // delete a branch
 // - [deleted]         (none)     -> 1 // delete a tag
 //   957a993..a87ba5f  test       -> origin/test
@@ -127,6 +128,11 @@ func parseRemoteUpdateOutput(output, remoteName string) []*mirrorSyncResult {
 				refName:     git.RefNameFromBranch(refName),
 				oldCommitID: gitShortEmptySha,
 			})
+		case strings.HasPrefix(lines[i], " * [new ref]"): // new reference
+			results = append(results, &mirrorSyncResult{
+				refName:     git.RefName(refName),
+				oldCommitID: gitShortEmptySha,
+			})
 		case strings.HasPrefix(lines[i], " - "): // Delete reference
 			isTag := !strings.HasPrefix(refName, remoteName+"/")
 			var refFullName git.RefName
@@ -169,8 +175,15 @@ func parseRemoteUpdateOutput(output, remoteName string) []*mirrorSyncResult {
 				log.Error("Expect two SHAs but not what found: %q", lines[i])
 				continue
 			}
+			var refFullName git.RefName
+			if strings.HasPrefix(refName, "refs/") {
+				refFullName = git.RefName(refName)
+			} else {
+				refFullName = git.RefNameFromBranch(strings.TrimPrefix(refName, remoteName+"/"))
+			}
+
 			results = append(results, &mirrorSyncResult{
-				refName:     git.RefNameFromBranch(strings.TrimPrefix(refName, remoteName+"/")),
+				refName:     refFullName,
 				oldCommitID: shas[0],
 				newCommitID: shas[1],
 			})