File history for renamed files, with '--follow' equivalent to show the complete history

modules/git/commit.go

@@ -162,17 +162,25 @@ func AllCommitsCount(ctx context.Context, repoPath string, hidePRRefs bool, file
 
 // CommitsCountOptions the options when counting commits
 type CommitsCountOptions struct {
-	RepoPath string
-	Not      string
-	Revision []string
-	RelPath  []string
-	Since    string
-	Until    string
+	RepoPath     string
+	Not          string
+	Revision     []string
+	RelPath      []string
+	Since        string
+	Until        string
+	FollowRename bool
 }
 
 // CommitsCount returns number of total commits of until given revision.
 func CommitsCount(ctx context.Context, opts CommitsCountOptions) (int64, error) {
-	cmd := NewCommand("rev-list", "--count")
+	var cmd *Command
+	followRename := len(opts.RelPath) > 0 && opts.FollowRename
+
+	if followRename {
+		cmd = NewCommand("--no-pager", "log", "--pretty=format:%H")
+	} else {
+		cmd = NewCommand("rev-list", "--count")
+	}
 
 	cmd.AddDynamicArguments(opts.Revision...)
 
@@ -181,14 +189,19 @@ func CommitsCount(ctx context.Context, opts CommitsCountOptions) (int64, error)
 	}
 
 	if len(opts.RelPath) > 0 {
+		if opts.FollowRename {
+			cmd.AddOptionValues("--follow")
+		}
 		cmd.AddDashesAndList(opts.RelPath...)
 	}
 
 	stdout, _, err := cmd.RunStdString(ctx, &RunOpts{Dir: opts.RepoPath})
 	if err != nil {
 		return 0, err
 	}
-
+	if followRename {
+		return int64(len(strings.Split(stdout, "\n"))), nil
+	}
 	return strconv.ParseInt(strings.TrimSpace(stdout), 10, 64)
 }
 

modules/git/repo_commit.go

@@ -205,22 +205,29 @@ func (repo *Repository) FileChangedBetweenCommits(filename, id1, id2 string) (bo
 }
 
 // FileCommitsCount return the number of files at a revision
-func (repo *Repository) FileCommitsCount(revision, file string) (int64, error) {
+func (repo *Repository) FileCommitsCount(revision, file string, followRename ...bool) (int64, error) {
+	_followRename := false
+	if len(followRename) > 0 {
+		_followRename = followRename[0]
+	}
+
 	return CommitsCount(repo.Ctx,
 		CommitsCountOptions{
-			RepoPath: repo.Path,
-			Revision: []string{revision},
-			RelPath:  []string{file},
+			RepoPath:     repo.Path,
+			Revision:     []string{revision},
+			RelPath:      []string{file},
+			FollowRename: _followRename,
 		})
 }
 
 type CommitsByFileAndRangeOptions struct {
-	Revision string
-	File     string
-	Not      string
-	Page     int
-	Since    string
-	Until    string
+	Revision     string
+	File         string
+	Not          string
+	Page         int
+	Since        string
+	Until        string
+	FollowRename bool
 }
 
 // CommitsByFileAndRange return the commits according revision file and the page
@@ -232,9 +239,18 @@ func (repo *Repository) CommitsByFileAndRange(opts CommitsByFileAndRangeOptions)
 	}()
 	go func() {
 		stderr := strings.Builder{}
-		gitCmd := NewCommand("rev-list").
-			AddOptionFormat("--max-count=%d", setting.Git.CommitsRangeSize).
+		var gitCmd *Command
+
+		if !opts.FollowRename {
+			gitCmd = NewCommand("rev-list")
+		} else {
+			gitCmd = NewCommand("--no-pager", "log").
+				AddOptionFormat("--pretty=format:%%H").
+				AddOptionFormat("--follow")
+		}
+		gitCmd.AddOptionFormat("--max-count=%d", setting.Git.CommitsRangeSize).
 			AddOptionFormat("--skip=%d", (opts.Page-1)*setting.Git.CommitsRangeSize)
+
 		gitCmd.AddDynamicArguments(opts.Revision)
 
 		if opts.Not != "" {
@@ -253,7 +269,8 @@ func (repo *Repository) CommitsByFileAndRange(opts CommitsByFileAndRangeOptions)
 			Stdout: stdoutWriter,
 			Stderr: &stderr,
 		})
-		if err != nil {
+
+		if err != nil && !(opts.FollowRename && err == io.ErrUnexpectedEOF) {
 			_ = stdoutWriter.CloseWithError(ConcatenateError(err, (&stderr).String()))
 		} else {
 			_ = stdoutWriter.Close()
@@ -270,7 +287,7 @@ func (repo *Repository) CommitsByFileAndRange(opts CommitsByFileAndRangeOptions)
 	shaline := make([]byte, length+1)
 	for {
 		n, err := io.ReadFull(stdoutReader, shaline)
-		if err != nil || n < length {
+		if (err != nil && !(opts.FollowRename && err == io.ErrUnexpectedEOF)) || n < length {
 			if err == io.EOF {
 				err = nil
 			}

options/locale/locale_en-US.ini

@@ -1408,6 +1408,7 @@ editor.fork_branch_exists = Branch "%s" already exists in your fork, please choo
 
 commits.desc = Browse source code change history.
 commits.commits = Commits
+commits.history_follow_rename = Include renames
 commits.no_commits = No commits in common. "%s" and "%s" have entirely different histories.
 commits.nothing_to_compare = These branches are equal.
 commits.search.tooltip = You can prefix keywords with "author:", "committer:", "after:", or "before:", e.g. "revert author:Alice before:2019-01-13".

routers/web/repo/commit.go

@@ -213,12 +213,14 @@ func SearchCommits(ctx *context.Context) {
 
 // FileHistory show a file's reversions
 func FileHistory(ctx *context.Context) {
+	followRename := strings.Contains(ctx.Req.RequestURI, "history_follow_rename=true")
+
 	if ctx.Repo.TreePath == "" {
 		Commits(ctx)
 		return
 	}
 
-	commitsCount, err := ctx.Repo.GitRepo.FileCommitsCount(ctx.Repo.RefFullName.ShortName(), ctx.Repo.TreePath)
+	commitsCount, err := ctx.Repo.GitRepo.FileCommitsCount(ctx.Repo.RefFullName.ShortName(), ctx.Repo.TreePath, followRename)
 	if err != nil {
 		ctx.ServerError("FileCommitsCount", err)
 		return
@@ -231,9 +233,10 @@ func FileHistory(ctx *context.Context) {
 
 	commits, err := ctx.Repo.GitRepo.CommitsByFileAndRange(
 		git.CommitsByFileAndRangeOptions{
-			Revision: ctx.Repo.RefFullName.ShortName(), // FIXME: legacy code used ShortName
-			File:     ctx.Repo.TreePath,
-			Page:     page,
+			Revision:     ctx.Repo.RefFullName.ShortName(), // FIXME: legacy code used ShortName
+			File:         ctx.Repo.TreePath,
+			Page:         page,
+			FollowRename: followRename,
 		})
 	if err != nil {
 		ctx.ServerError("CommitsByFileAndRange", err)

templates/repo/commits_table.tmpl

@@ -8,6 +8,10 @@
 			{{ctx.Locale.Tr "repo.commits.no_commits" $.BaseBranch $.HeadBranch}}
 		{{end}}
 	</div>
+	<div class="commits-table-left tw-flex tw-items-center">
+		<input type="checkbox" name="history-enable-follow-renames" class="tw-mr-[5px]"/>
+		<label for="history-enable-follow-renames">{{ctx.Locale.Tr "repo.commits.history_follow_rename"}}</label>
+	</div>
 	{{if .IsDiffCompare}}
 		<div class="commits-table-right tw-whitespace-nowrap">
 			<a href="{{$.CommitRepoLink}}/commit/{{.BeforeCommitID | PathEscape}}" class="ui green sha label tw-mx-0">{{if not .BaseIsCommit}}{{if .BaseIsBranch}}{{svg "octicon-git-branch"}}{{else if .BaseIsTag}}{{svg "octicon-tag"}}{{end}}{{.BaseBranch}}{{else}}{{ShortSha .BaseBranch}}{{end}}</a>

web_src/js/features/repo-commit.ts

@@ -24,3 +24,20 @@
     });
   });
 }
+
+export function initCommitFileHistoryFollowRename() {
+  const checkbox : HTMLInputElement | null = document.querySelector('input[name=history-enable-follow-renames]');
+
+  if (!checkbox) {
+    return;
+  }
+  const url = new URL(window.location.toString());
+  checkbox.checked = url.searchParams.has('history_follow_rename', 'true');
+
+  checkbox.addEventListener('change', () => {
+    const url = new URL(window.location);
+
+    url.searchParams.set('history_follow_rename', `${checkbox.checked}`);
+    window.location.replace(url);
+  });
+}

web_src/js/index.ts

@@ -22,7 +22,7 @@ import {initMarkupContent} from './markup/content.ts';
 import {initPdfViewer} from './render/pdf.ts';
 import {initUserAuthOauth2, initUserCheckAppUrl} from './features/user-auth.ts';
 import {initRepoPullRequestAllowMaintainerEdit, initRepoPullRequestReview, initRepoIssueSidebarDependency, initRepoIssueFilterItemLabel} from './features/repo-issue.ts';
-import {initRepoEllipsisButton, initCommitStatuses} from './features/repo-commit.ts';
+import {initRepoEllipsisButton, initCommitStatuses, initCommitFileHistoryFollowRename} from './features/repo-commit.ts';
 import {initRepoTopicBar} from './features/repo-home.ts';
 import {initAdminCommon} from './features/admin/common.ts';
 import {initRepoCodeView} from './features/repo-code.ts';
@@ -151,6 +151,7 @@ onDomReady(() => {
     initRepoRecentCommits,
 
     initCommitStatuses,
+    initCommitFileHistoryFollowRename,
     initCaptcha,
 
     initUserCheckAppUrl,