feat(repo): display co-author stacks beside commit SHAs

Show co-author avatar stacks on commit SHA surfaces including commits list rows, graph, blame, and dashboard feeds, with repository-level data propagation and tests.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

modules/repository/commits.go

@@ -29,6 +29,7 @@ type PushCommit struct {
 	AuthorName     string
 	CommitterEmail string
 	CommitterName  string
+	CoAuthors      []*git.Signature
 	Timestamp      time.Time
 }
 
@@ -157,6 +158,7 @@ func CommitToPushCommit(commit *git.Commit) *PushCommit {
 		AuthorName:     commit.Author.Name,
 		CommitterEmail: commit.Committer.Email,
 		CommitterName:  commit.Committer.Name,
+		CoAuthors:      commit.CoAuthorSignatures(),
 		Timestamp:      commit.Author.When,
 	}
 }

modules/repository/commits_test.go

@@ -145,14 +145,18 @@ func TestCommitToPushCommit(t *testing.T) {
 		ID:            sha1,
 		Author:        sig,
 		Committer:     sig,
-		CommitMessage: git.CommitMessage{MessageRaw: "Commit Message"},
+		CommitMessage: git.CommitMessage{MessageRaw: "Commit Message\n\nCo-authored-by: Jane Doe <jane@example.com>"},
 	})
 	assert.Equal(t, hexString, pushCommit.Sha1)
-	assert.Equal(t, "Commit Message", pushCommit.Message)
+	assert.Equal(t, "Commit Message\n\nCo-authored-by: Jane Doe <jane@example.com>", pushCommit.Message)
 	assert.Equal(t, "example@example.com", pushCommit.AuthorEmail)
 	assert.Equal(t, "John Doe", pushCommit.AuthorName)
 	assert.Equal(t, "example@example.com", pushCommit.CommitterEmail)
 	assert.Equal(t, "John Doe", pushCommit.CommitterName)
+	if assert.Len(t, pushCommit.CoAuthors, 1) {
+		assert.Equal(t, "jane@example.com", pushCommit.CoAuthors[0].Email)
+		assert.Equal(t, "Jane Doe", pushCommit.CoAuthors[0].Name)
+	}
 	assert.Equal(t, now, pushCommit.Timestamp)
 }
 

routers/web/repo/blame.go

@@ -29,12 +29,14 @@ import (
 type blameRow struct {
 	RowNumber int
 
-	Avatar         template.HTML
 	PreviousSha    string
 	PreviousShaURL string
 	CommitURL      string
 	CommitMessage  string
 	CommitSince    template.HTML
+	AuthorUser     *user_model.User
+	CoAuthors      []*user_model.CoAuthorUser
+	Author         *git.Signature
 
 	Code         template.HTML
 	EscapeStatus *charset.EscapeStatus
@@ -221,13 +223,10 @@ func processBlameParts(ctx *context.Context, blameParts []*gitrepo.BlamePart) ma
 	return commitNames
 }
 
-func renderBlameFillFirstBlameRow(repoLink string, avatarUtils *templates.AvatarUtils, part *gitrepo.BlamePart, commit *user_model.UserCommit, br *blameRow) {
-	if commit.User != nil {
-		br.Avatar = avatarUtils.Avatar(commit.User, 18)
-	} else {
-		br.Avatar = avatarUtils.AvatarByEmail(commit.Author.Email, commit.Author.Name, 18)
-	}
-
+func renderBlameFillFirstBlameRow(repoLink string, part *gitrepo.BlamePart, commit *user_model.UserCommit, br *blameRow) {
+	br.AuthorUser = commit.User
+	br.CoAuthors = commit.CoAuthors
+	br.Author = commit.Author
 	br.PreviousSha = part.PreviousSha
 	br.PreviousShaURL = fmt.Sprintf("%s/blame/commit/%s/%s", repoLink, url.PathEscape(part.PreviousSha), util.PathEscapeSegments(part.PreviousPath))
 	br.CommitURL = fmt.Sprintf("%s/commit/%s", repoLink, url.PathEscape(part.Sha))
@@ -243,7 +242,6 @@ func renderBlame(ctx *context.Context, blameParts []*gitrepo.BlamePart, commitNa
 
 	buf := &bytes.Buffer{}
 	rows := make([]*blameRow, 0)
-	avatarUtils := templates.NewAvatarUtils(ctx)
 	rowNumber := 0 // will be 1-based
 	for _, part := range blameParts {
 		for partLineIdx, line := range part.Lines {
@@ -258,7 +256,7 @@ func renderBlame(ctx *context.Context, blameParts []*gitrepo.BlamePart, commitNa
 			}
 
 			if partLineIdx == 0 {
-				renderBlameFillFirstBlameRow(ctx.Repo.RepoLink, avatarUtils, part, commitNames[part.Sha], br)
+				renderBlameFillFirstBlameRow(ctx.Repo.RepoLink, part, commitNames[part.Sha], br)
 			}
 		}
 	}

services/repository/gitgraph/graph_models.go

@@ -93,9 +93,7 @@ func (graph *Graph) AddCommit(row, column int, flowID int64, data []byte) error
 // before finally retrieving the latest status
 func (graph *Graph) LoadAndProcessCommits(ctx context.Context, repository *repo_model.Repository, gitRepo *git.Repository) error {
 	var err error
-	var ok bool
-
-	emails := map[string]*user_model.User{}
+	emailSet := map[string]struct{}{}
 	keyMap := map[string]bool{}
 
 	for _, c := range graph.Commits {
@@ -106,13 +104,44 @@ func (graph *Graph) LoadAndProcessCommits(ctx context.Context, repository *repo_
 		if err != nil {
 			return fmt.Errorf("GetCommit: %s Error: %w", c.Rev, err)
 		}
-
 		if c.Commit.Author != nil {
-			email := c.Commit.Author.Email
-			if c.User, ok = emails[email]; !ok {
-				c.User, _ = user_model.GetUserByEmail(ctx, email)
-				emails[email] = c.User
+			emailSet[c.Commit.Author.Email] = struct{}{}
+		}
+		for _, sig := range c.Commit.CoAuthorSignatures() {
+			emailSet[sig.Email] = struct{}{}
+		}
+	}
+
+	allEmails := make([]string, 0, len(emailSet))
+	for email := range emailSet {
+		allEmails = append(allEmails, email)
+	}
+	var emailUserMap *user_model.EmailUserMap
+	if len(allEmails) > 0 {
+		emailUserMap, err = user_model.GetUsersByEmails(ctx, allEmails)
+		if err != nil {
+			log.Error("GetUsersByEmails: %v", err)
+		}
+	}
+
+	for _, c := range graph.Commits {
+		if c.Commit == nil {
+			continue
+		}
+		if c.Commit.Author != nil && emailUserMap != nil {
+			c.User = emailUserMap.GetByEmail(c.Commit.Author.Email)
+		}
+		coAuthorSigs := c.Commit.CoAuthorSignatures()
+		c.CoAuthors = make([]*user_model.CoAuthorUser, 0, len(coAuthorSigs))
+		for _, sig := range coAuthorSigs {
+			var giteaUser *user_model.User
+			if emailUserMap != nil {
+				giteaUser = emailUserMap.GetByEmail(sig.Email)
 			}
+			c.CoAuthors = append(c.CoAuthors, &user_model.CoAuthorUser{
+				GiteaUser:        giteaUser,
+				TrailerSignature: sig,
+			})
 		}
 
 		c.Verification = asymkey_service.ParseCommitWithSignature(ctx, c.Commit)
@@ -248,6 +277,7 @@ func newRefsFromRefNames(refNames []byte) []git.Reference {
 type Commit struct {
 	Commit       *git.Commit
 	User         *user_model.User
+	CoAuthors    []*user_model.CoAuthorUser
 	Verification *asymkey_model.CommitVerification
 	Status       *git_model.CommitStatus
 	Flow         int64

templates/repo/blame.tmpl

@@ -43,7 +43,7 @@
 								<div class="blame-info">
 									<div class="blame-data">
 										<div class="blame-avatar">
-											{{$row.Avatar}}
+											{{template "repo/commit_coauthor_avatar_stack" dict "AuthorUser" $row.AuthorUser "AuthorSignature" $row.Author "CoAuthors" $row.CoAuthors}}
 										</div>
 										<div class="blame-message muted-links" title="{{$row.CommitMessage}}">
 											{{ctx.RenderUtils.RenderCommitMessageLinkSubject $row.CommitMessage $row.CommitURL $.Repository}}

templates/repo/commit_sign_badge.tmpl

@@ -64,10 +64,10 @@ so this template should be kept as small as possible, DO NOT put large component
 		{{- if $verified -}}
 			{{- if and $signingUser $signingUser.ID -}}
 				<span data-tooltip-content="{{$msgReason}}">{{svg "gitea-lock"}}</span>
-				<span data-tooltip-content="{{$msgSigningKey}}">{{ctx.AvatarUtils.Avatar $signingUser 16}}</span>
+				<span data-tooltip-content="{{$msgSigningKey}}">{{ctx.AvatarUtils.Avatar $signingUser 20}}</span>
 			{{- else -}}
 				<span data-tooltip-content="{{$msgReason}}">{{svg "gitea-lock-cog"}}</span>
-				<span data-tooltip-content="{{$msgSigningKey}}">{{ctx.AvatarUtils.AvatarByEmail $signingEmail "" 16}}</span>
+				<span data-tooltip-content="{{$msgSigningKey}}">{{ctx.AvatarUtils.AvatarByEmail $signingEmail "" 20}}</span>
 			{{- end -}}
 		{{- else -}}
 			<span data-tooltip-content="{{$msgReason}}">{{svg "gitea-unlock"}}</span>

templates/repo/commits_list_small.tmpl

@@ -5,11 +5,7 @@
 	{{$index = Eval $index "+" 1}}
 	<div class="flex-text-block" id="{{$tag}}">{{/*singular-commit*/}}
 		<span class="badge badge-commit">{{svg "octicon-git-commit"}}</span>
-		{{if .User}}
-			<a class="avatar" href="{{.User.HomeLink}}">{{ctx.AvatarUtils.Avatar .User 20}}</a>
-		{{else}}
-			{{ctx.AvatarUtils.AvatarByEmail .Author.Email .Author.Name 20}}
-		{{end}}
+		{{template "repo/commit_coauthor_avatar_stack" dict "AuthorUser" .User "AuthorSignature" .Author "CoAuthors" .CoAuthors}}
 
 		{{$commitBaseLink := printf "%s/commit" $.comment.Issue.PullRequest.BaseRepo.Link}}
 		{{$commitLink:= printf "%s/%s" $commitBaseLink (PathEscape .ID.String)}}

templates/repo/graph/commits.tmpl

@@ -41,14 +41,7 @@
 					</span>
 
 					<span class="flex-text-inline tw-text-12">
-						{{if $commit.User}}
-							{{ctx.AvatarUtils.Avatar $commit.User 18}}
-							{{$commit.User.GetShortDisplayNameLinkHTML}}
-						{{else}}
-							{{$gitUserName := $commit.Commit.Author.Name}}
-							{{ctx.AvatarUtils.AvatarByEmail $commit.Commit.Author.Email $gitUserName 18}}
-							{{$gitUserName}}
-						{{end}}
+						{{template "repo/commit_coauthor_avatars" dict "AuthorUser" $commit.User "AuthorSignature" $commit.Commit.Author "CoAuthors" $commit.CoAuthors}}
 					</span>
 
 					<span class="time flex-text-inline">{{DateUtils.FullTime $commit.Date}}</span>

templates/user/dashboard/feeds.tmpl

@@ -91,7 +91,7 @@
 						{{range $pushCommit := $push.Commits}}
 							{{$commitLink := printf "%s/commit/%s" $repoLink .Sha1}}
 							<div class="flex-text-block">
-								<img loading="lazy" alt class="ui avatar" src="{{$push.AvatarLink ctx .AuthorEmail}}" title="{{.AuthorName}}" width="16" height="16">
+								{{template "repo/commit_coauthor_avatar_stack" dict "AuthorSignature" (dict "Email" .AuthorEmail "Name" .AuthorName) "CoAuthorSignatures" .CoAuthors}}
 								<a class="ui sha label" href="{{$commitLink}}">{{ShortSha .Sha1}}</a>
 								<span class="tw-inline-block tw-truncate">
 									{{ctx.RenderUtils.RenderCommitMessage $pushCommit.Message $repo}}