Use full output of git show-ref --tags to get tags for PushUpdateAddTag (#19235)

Strangely #19038 appears to relate to an issue whereby a tag appears to
be listed in `git show-ref --tags` but then does not appear when `git
show-ref --tags -- short_name` is called.

As a solution though I propose to stop the second call as it is
unnecessary and only likely to cause problems.

I've also noticed that the tags calls are wildly inefficient and aren't using the common cat-files - so these have been added.

I've also noticed that the git commit-graph is not being written on mirroring - so I've also added writing this to the migration which should improve mirror rendering somewhat. 

Fix #19038

Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: 6543 <6543@obermui.de>

1 files changed, 22 insertions, 13 deletions

diff --git a/modules/repository/repo.go b/modules/repository/repo.go
index dbf4b527bf..7170bed8be 100644
--- a/modules/repository/repo.go
+++ b/modules/repository/repo.go
@@ -81,6 +81,10 @@ func MigrateRepositoryGitData(ctx context.Context, u *user_model.User,
 		return repo, fmt.Errorf("Clone: %v", err)
 	}
 
+	if err := git.WriteCommitGraph(ctx, repoPath); err != nil {
+		return repo, err
+	}
+
 	if opts.Wiki {
 		wikiPath := repo_model.WikiPath(u.Name, opts.RepoName)
 		wikiRemotePath := WikiRemoteURL(ctx, opts.CloneAddr)
@@ -102,6 +106,9 @@ func MigrateRepositoryGitData(ctx context.Context, u *user_model.User,
 				}
 			}
 		}
+		if err := git.WriteCommitGraph(ctx, wikiPath); err != nil {
+			return repo, err
+		}
 	}
 
 	if repo.OwnerID == u.ID {
@@ -279,23 +286,25 @@ func SyncReleasesWithTags(repo *repo_model.Repository, gitRepo *git.Repository)
 			}
 		}
 	}
-	tags, err := gitRepo.GetTags(0, 0)
-	if err != nil {
-		return fmt.Errorf("unable to GetTags in Repo[%d:%s/%s]: %w", repo.ID, repo.OwnerName, repo.Name, err)
-	}
-	for _, tagName := range tags {
-		if _, ok := existingRelTags[strings.ToLower(tagName)]; !ok {
-			if err := PushUpdateAddTag(repo, gitRepo, tagName); err != nil {
-				return fmt.Errorf("unable to PushUpdateAddTag: %q to Repo[%d:%s/%s]: %w", tagName, repo.ID, repo.OwnerName, repo.Name, err)
-			}
+
+	_, err := gitRepo.WalkReferences(git.ObjectTag, 0, 0, func(sha1, refname string) error {
+		tagName := strings.TrimPrefix(refname, git.TagPrefix)
+		if _, ok := existingRelTags[strings.ToLower(tagName)]; ok {
+			return nil
 		}
-	}
-	return nil
+
+		if err := PushUpdateAddTag(repo, gitRepo, tagName, sha1, refname); err != nil {
+			return fmt.Errorf("unable to PushUpdateAddTag: %q to Repo[%d:%s/%s]: %w", tagName, repo.ID, repo.OwnerName, repo.Name, err)
+		}
+
+		return nil
+	})
+	return err
 }
 
 // PushUpdateAddTag must be called for any push actions to add tag
-func PushUpdateAddTag(repo *repo_model.Repository, gitRepo *git.Repository, tagName string) error {
-	tag, err := gitRepo.GetTag(tagName)
+func PushUpdateAddTag(repo *repo_model.Repository, gitRepo *git.Repository, tagName, sha1, refname string) error {
+	tag, err := gitRepo.GetTagWithID(sha1, tagName)
 	if err != nil {
 		return fmt.Errorf("unable to GetTag: %w", err)
 	}