dagger/dagger · error

list tags for %s: %w

Error message

list tags for %s: %w

What it means

Same call path as the branches error: loadWorkspaceRemoteRows wraps dag.Git(ref).Tags(ctx) failures as "list tags for %s: %w". It is thrown when listing tags from the remote git service fails even if branches listed fine.

Source

Thrown at internal/cmd/dagger/workspace.go:1149

	return subdir
}

type workspaceRemoteRow struct {
	Kind      string
	Address   string
	Autocheck string
	Checks    string
}

func loadWorkspaceRemoteRows(ctx context.Context, dag *dagger.Client, remote workspaceRemoteAddress) ([]*workspaceRemoteRow, error) {
	repo := dag.Git(remote.CloneRef)
	branches, err := repo.Branches(ctx)
	if err != nil {
		return nil, fmt.Errorf("list branches for %s: %w", remote.CloneRef, err)
	}
	tags, err := repo.Tags(ctx)
	if err != nil {
		return nil, fmt.Errorf("list tags for %s: %w", remote.CloneRef, err)
	}

	sort.Strings(branches)
	sort.Strings(tags)

	rows := make([]*workspaceRemoteRow, 0, len(branches)+len(tags)+1)
	seen := map[string]struct{}{}
	add := func(kind, version string) {
		if version == "" {
			return
		}
		address := gitref.RefString(remote.CloneRef, remote.Path, version)
		if _, ok := seen[address]; ok {
			return
		}
		seen[address] = struct{}{}
		rows = append(rows, &workspaceRemoteRow{
			Kind:      kind,

View on GitHub (pinned to 82ba2681db)

Solutions

1. Re-run the command — tags listing is often transient (rate limits, network)
2. Confirm repo access/credentials as with the branches error
3. Check git host status/limits if errors repeat
4. Verify the CloneRef points at an existing repository

Example fix

// retry pattern
for i := 0; i < 3; i++ {
    tags, err := repo.Tags(ctx)
    if err == nil { break }
    time.Sleep(time.Second << i)
}

if !isHTTPSGitURL(remote.CloneRef) {
    return errors.New("CloneRef must be an https git URL")
}

func remoteReachable(ctx context.Context, dag *dagger.Client, ref string) bool {
    _, err := dag.Git(ref).Branches(ctx)
    return err == nil
}

rows, err := loadWorkspaceRemoteRows(ctx, dag, remote)
var retryable = strings.Contains(err.Error(), "list tags") || strings.Contains(err.Error(), "list branches")
if retryable {
    rows, err = loadWorkspaceRemoteRows(ctx, dag, remote) // transient host failures are common
}

When it happens

Trigger: Transient API failure on the second call, repo inaccessible to the service, or the host refusing the tags query for the given CloneRef.

Common situations: Rate limiting by the git host; flaky network between engine and host; private repo auth partially configured; repos with unusual tag permissions.

Related errors

• list branches for %s: %w
• resolve git remote HEAD: %w
• resolve latest git release %q: %w
• failed to checkout remote %s: %w
• failed to fetch ref %d: %w

AI-assisted analysis of dagger/dagger@82ba2681db (2026-09-05). Data as JSON: /api/errors/1181608c0611cd5f. Report an issue: GitHub.