Add option to blame files (#5721)

models/git_blame.go

@@ -0,0 +1,124 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package models
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"os"
+	"os/exec"
+	"regexp"
+
+	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/process"
+)
+
+// BlamePart represents block of blame - continuous lines with one sha
+type BlamePart struct {
+	Sha   string
+	Lines []string
+}
+
+// BlameReader returns part of file blame one by one
+type BlameReader struct {
+	cmd     *exec.Cmd
+	pid     int64
+	output  io.ReadCloser
+	scanner *bufio.Scanner
+	lastSha *string
+}
+
+var shaLineRegex = regexp.MustCompile("^([a-z0-9]{40})")
+
+// NextPart returns next part of blame (sequencial code lines with the same commit)
+func (r *BlameReader) NextPart() (*BlamePart, error) {
+	var blamePart *BlamePart
+
+	scanner := r.scanner
+
+	if r.lastSha != nil {
+		blamePart = &BlamePart{*r.lastSha, make([]string, 0, 0)}
+	}
+
+	for scanner.Scan() {
+		line := scanner.Text()
+
+		// Skip empty lines
+		if len(line) == 0 {
+			continue
+		}
+
+		lines := shaLineRegex.FindStringSubmatch(line)
+		if lines != nil {
+			sha1 := lines[1]
+
+			if blamePart == nil {
+				blamePart = &BlamePart{sha1, make([]string, 0, 0)}
+			}
+
+			if blamePart.Sha != sha1 {
+				r.lastSha = &sha1
+				return blamePart, nil
+			}
+		} else if line[0] == '\t' {
+			code := line[1:]
+
+			blamePart.Lines = append(blamePart.Lines, code)
+		}
+	}
+
+	r.lastSha = nil
+
+	return blamePart, nil
+}
+
+// Close BlameReader - don't run NextPart after invoking that
+func (r *BlameReader) Close() error {
+	process.GetManager().Remove(r.pid)
+
+	if err := r.cmd.Wait(); err != nil {
+		return fmt.Errorf("Wait: %v", err)
+	}
+
+	return nil
+}
+
+// CreateBlameReader creates reader for given repository, commit and file
+func CreateBlameReader(repoPath, commitID, file string) (*BlameReader, error) {
+	_, err := git.OpenRepository(repoPath)
+	if err != nil {
+		return nil, err
+	}
+
+	return createBlameReader(repoPath, "git", "blame", commitID, "--porcelain", "--", file)
+}
+
+func createBlameReader(dir string, command ...string) (*BlameReader, error) {
+	cmd := exec.Command(command[0], command[1:]...)
+	cmd.Dir = dir
+	cmd.Stderr = os.Stderr
+
+	stdout, err := cmd.StdoutPipe()
+	if err != nil {
+		return nil, fmt.Errorf("StdoutPipe: %v", err)
+	}
+
+	if err = cmd.Start(); err != nil {
+		return nil, fmt.Errorf("Start: %v", err)
+	}
+
+	pid := process.GetManager().Add(fmt.Sprintf("GetBlame [repo_path: %s]", dir), cmd)
+
+	scanner := bufio.NewScanner(stdout)
+
+	return &BlameReader{
+		cmd,
+		pid,
+		stdout,
+		scanner,
+		nil,
+	}, nil
+}

models/git_blame_test.go

@@ -0,0 +1,141 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package models
+
+import (
+	"io/ioutil"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+const exampleBlame = `
+4b92a6c2df28054ad766bc262f308db9f6066596 1 1 1
+author Unknown
+author-mail <joe2010xtmf@163.com>
+author-time 1392833071
+author-tz -0500
+committer Unknown
+committer-mail <joe2010xtmf@163.com>
+committer-time 1392833071
+committer-tz -0500
+summary Add code of delete user
+previous be0ba9ea88aff8a658d0495d36accf944b74888d gogs.go
+filename gogs.go
+	// Copyright 2014 The Gogs Authors. All rights reserved.
+ce21ed6c3490cdfad797319cbb1145e2330a8fef 2 2 1
+author Joubert RedRat
+author-mail <eu+github@redrat.com.br>
+author-time 1482322397
+author-tz -0200
+committer Lunny Xiao
+committer-mail <xiaolunwen@gmail.com>
+committer-time 1482322397
+committer-tz +0800
+summary Remove remaining Gogs reference on locales and cmd (#430)
+previous 618407c018cdf668ceedde7454c42fb22ba422d8 main.go
+filename main.go
+	// Copyright 2016 The Gitea Authors. All rights reserved.
+4b92a6c2df28054ad766bc262f308db9f6066596 2 3 2
+author Unknown
+author-mail <joe2010xtmf@163.com>
+author-time 1392833071
+author-tz -0500
+committer Unknown
+committer-mail <joe2010xtmf@163.com>
+committer-time 1392833071
+committer-tz -0500
+summary Add code of delete user
+previous be0ba9ea88aff8a658d0495d36accf944b74888d gogs.go
+filename gogs.go
+	// Use of this source code is governed by a MIT-style
+4b92a6c2df28054ad766bc262f308db9f6066596 3 4
+author Unknown
+author-mail <joe2010xtmf@163.com>
+author-time 1392833071
+author-tz -0500
+committer Unknown
+committer-mail <joe2010xtmf@163.com>
+committer-time 1392833071
+committer-tz -0500
+summary Add code of delete user
+previous be0ba9ea88aff8a658d0495d36accf944b74888d gogs.go
+filename gogs.go
+	// license that can be found in the LICENSE file.
+	
+e2aa991e10ffd924a828ec149951f2f20eecead2 6 6 2
+author Lunny Xiao
+author-mail <xiaolunwen@gmail.com>
+author-time 1478872595
+author-tz +0800
+committer Sandro Santilli
+committer-mail <strk@kbt.io>
+committer-time 1478872595
+committer-tz +0100
+summary ask for go get from code.gitea.io/gitea and change gogs to gitea on main file (#146)
+previous 5fc370e332171b8658caed771b48585576f11737 main.go
+filename main.go
+	// Gitea (git with a cup of tea) is a painless self-hosted Git Service.
+e2aa991e10ffd924a828ec149951f2f20eecead2 7 7
+	package main // import "code.gitea.io/gitea"
+`
+
+func TestReadingBlameOutput(t *testing.T) {
+	tempFile, err := ioutil.TempFile("", ".txt")
+	if err != nil {
+		panic(err)
+	}
+
+	defer tempFile.Close()
+
+	if _, err = tempFile.WriteString(exampleBlame); err != nil {
+		panic(err)
+	}
+
+	blameReader, err := createBlameReader("", "cat", tempFile.Name())
+	if err != nil {
+		panic(err)
+	}
+	defer blameReader.Close()
+
+	parts := []*BlamePart{
+		{
+			"4b92a6c2df28054ad766bc262f308db9f6066596",
+			[]string{
+				"// Copyright 2014 The Gogs Authors. All rights reserved.",
+			},
+		},
+		{
+			"ce21ed6c3490cdfad797319cbb1145e2330a8fef",
+			[]string{
+				"// Copyright 2016 The Gitea Authors. All rights reserved.",
+			},
+		},
+		{
+			"4b92a6c2df28054ad766bc262f308db9f6066596",
+			[]string{
+				"// Use of this source code is governed by a MIT-style",
+				"// license that can be found in the LICENSE file.",
+				"",
+			},
+		},
+		{
+			"e2aa991e10ffd924a828ec149951f2f20eecead2",
+			[]string{
+				"// Gitea (git with a cup of tea) is a painless self-hosted Git Service.",
+				"package main // import \"code.gitea.io/gitea\"",
+			},
+		},
+		nil,
+	}
+
+	for _, part := range parts {
+		actualPart, err := blameReader.NextPart()
+		if err != nil {
+			panic(err)
+		}
+		assert.Equal(t, part, actualPart)
+	}
+}

options/locale/locale_en-US.ini

@@ -651,6 +651,8 @@ video_not_supported_in_browser = Your browser does not support the HTML5 'video'
 audio_not_supported_in_browser = Your browser does not support the HTML5 'audio' tag.
 stored_lfs = Stored with Git LFS
 commit_graph = Commit Graph
+blame = Blame
+normal_view = Normal View
 
 editor.new_file = New File
 editor.upload_file = Upload File

public/less/_repository.less

@@ -373,6 +373,53 @@
                         }
                     }
                 }
+                .lines-commit {
+                    vertical-align: top;
+                    color: #999;
+                    padding: 0;
+                    background: #f5f5f5;
+                    width: 1%;
+                    -moz-user-select: none;
+                    -ms-user-select: none;
+                    -webkit-user-select: none;
+                    user-select: none;
+
+                    .blame-info {
+                        width: 350px;
+                        max-width: 350px;
+                        display: block;
+                        user-select: none;
+                        padding: 0 0 0 10px;
+
+                        .blame-data {
+                            display: flex;
+                            font-family: @default-fonts;
+
+                            .blame-message {
+                                flex-grow: 2;
+                                overflow: hidden;
+                                white-space: nowrap;
+                                text-overflow: ellipsis;
+                                line-height: 20px;
+                            }
+                            .blame-time, .blame-avatar {
+                                flex-shrink: 0;
+                            }
+                        }
+                    }
+
+                    .ui.avatar.image {
+                        height: 18px;
+                        width: 18px;
+                    }
+                }
+                .lines-num,
+                .lines-code,
+                .lines-commit {
+                    .bottom-line {
+                        border-bottom: 1px solid #eaecef;
+                    }
+                }
                 .active {
                     background: #ffffdd;
                 }

routers/repo/blame.go

@@ -0,0 +1,253 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package repo
+
+import (
+	"bytes"
+	"container/list"
+	"fmt"
+	"html"
+	gotemplate "html/template"
+	"net/url"
+	"strings"
+
+	"code.gitea.io/gitea/models"
+
+	"code.gitea.io/gitea/modules/base"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/highlight"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/markup"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/util"
+)
+
+const (
+	tplBlame base.TplName = "repo/home"
+)
+
+// RefBlame render blame page
+func RefBlame(ctx *context.Context) {
+	fileName := ctx.Repo.TreePath
+	if len(fileName) == 0 {
+		ctx.NotFound("Blame FileName", nil)
+		return
+	}
+
+	userName := ctx.Repo.Owner.Name
+	repoName := ctx.Repo.Repository.Name
+	commitID := ctx.Repo.CommitID
+
+	commit, err := ctx.Repo.GitRepo.GetCommit(commitID)
+	if err != nil {
+		if git.IsErrNotExist(err) {
+			ctx.NotFound("Repo.GitRepo.GetCommit", err)
+		} else {
+			ctx.ServerError("Repo.GitRepo.GetCommit", err)
+		}
+		return
+	}
+	if len(commitID) != 40 {
+		commitID = commit.ID.String()
+	}
+
+	branchLink := ctx.Repo.RepoLink + "/src/" + ctx.Repo.BranchNameSubURL()
+	treeLink := branchLink
+	rawLink := ctx.Repo.RepoLink + "/raw/" + ctx.Repo.BranchNameSubURL()
+
+	if len(ctx.Repo.TreePath) > 0 {
+		treeLink += "/" + ctx.Repo.TreePath
+	}
+
+	var treeNames []string
+	paths := make([]string, 0, 5)
+	if len(ctx.Repo.TreePath) > 0 {
+		treeNames = strings.Split(ctx.Repo.TreePath, "/")
+		for i := range treeNames {
+			paths = append(paths, strings.Join(treeNames[:i+1], "/"))
+		}
+
+		ctx.Data["HasParentPath"] = true
+		if len(paths)-2 >= 0 {
+			ctx.Data["ParentPath"] = "/" + paths[len(paths)-1]
+		}
+	}
+
+	// Show latest commit info of repository in table header,
+	// or of directory if not in root directory.
+	latestCommit := ctx.Repo.Commit
+	if len(ctx.Repo.TreePath) > 0 {
+		latestCommit, err = ctx.Repo.Commit.GetCommitByPath(ctx.Repo.TreePath)
+		if err != nil {
+			ctx.ServerError("GetCommitByPath", err)
+			return
+		}
+	}
+	ctx.Data["LatestCommit"] = latestCommit
+	ctx.Data["LatestCommitVerification"] = models.ParseCommitWithSignature(latestCommit)
+	ctx.Data["LatestCommitUser"] = models.ValidateCommitWithEmail(latestCommit)
+
+	statuses, err := models.GetLatestCommitStatus(ctx.Repo.Repository, ctx.Repo.Commit.ID.String(), 0)
+	if err != nil {
+		log.Error("GetLatestCommitStatus: %v", err)
+	}
+
+	// Get current entry user currently looking at.
+	entry, err := ctx.Repo.Commit.GetTreeEntryByPath(ctx.Repo.TreePath)
+	if err != nil {
+		ctx.NotFoundOrServerError("Repo.Commit.GetTreeEntryByPath", git.IsErrNotExist, err)
+		return
+	}
+
+	blob := entry.Blob()
+
+	ctx.Data["LatestCommitStatus"] = models.CalcCommitStatus(statuses)
+
+	ctx.Data["Paths"] = paths
+	ctx.Data["TreeLink"] = treeLink
+	ctx.Data["TreeNames"] = treeNames
+	ctx.Data["BranchLink"] = branchLink
+	ctx.Data["HighlightClass"] = highlight.FileNameToHighlightClass(entry.Name())
+	if !markup.IsReadmeFile(blob.Name()) {
+		ctx.Data["RequireHighlightJS"] = true
+	}
+	ctx.Data["RawFileLink"] = rawLink + "/" + ctx.Repo.TreePath
+	ctx.Data["PageIsViewCode"] = true
+
+	ctx.Data["IsBlame"] = true
+
+	if ctx.Repo.CanEnableEditor() {
+		ctx.Data["CanDeleteFile"] = true
+		ctx.Data["DeleteFileTooltip"] = ctx.Tr("repo.editor.delete_this_file")
+	} else if !ctx.Repo.IsViewBranch {
+		ctx.Data["DeleteFileTooltip"] = ctx.Tr("repo.editor.must_be_on_a_branch")
+	} else if !ctx.Repo.CanWrite(models.UnitTypeCode) {
+		ctx.Data["DeleteFileTooltip"] = ctx.Tr("repo.editor.must_have_write_access")
+	}
+
+	ctx.Data["FileSize"] = blob.Size()
+	ctx.Data["FileName"] = blob.Name()
+
+	blameReader, err := models.CreateBlameReader(models.RepoPath(userName, repoName), commitID, fileName)
+	if err != nil {
+		ctx.NotFound("CreateBlameReader", err)
+		return
+	}
+	defer blameReader.Close()
+
+	blameParts := make([]models.BlamePart, 0)
+
+	for {
+		blamePart, err := blameReader.NextPart()
+		if err != nil {
+			ctx.NotFound("NextPart", err)
+			return
+		}
+		if blamePart == nil {
+			break
+		}
+		blameParts = append(blameParts, *blamePart)
+	}
+
+	commitNames := make(map[string]models.UserCommit)
+	commits := list.New()
+
+	for _, part := range blameParts {
+		sha := part.Sha
+		if _, ok := commitNames[sha]; ok {
+			continue
+		}
+
+		commit, err := ctx.Repo.GitRepo.GetCommit(sha)
+		if err != nil {
+			if git.IsErrNotExist(err) {
+				ctx.NotFound("Repo.GitRepo.GetCommit", err)
+			} else {
+				ctx.ServerError("Repo.GitRepo.GetCommit", err)
+			}
+			return
+		}
+
+		commits.PushBack(commit)
+
+		commitNames[commit.ID.String()] = models.UserCommit{}
+	}
+
+	commits = models.ValidateCommitsWithEmails(commits)
+
+	for e := commits.Front(); e != nil; e = e.Next() {
+		c := e.Value.(models.UserCommit)
+
+		commitNames[c.ID.String()] = c
+	}
+
+	renderBlame(ctx, blameParts, commitNames)
+
+	ctx.HTML(200, tplBlame)
+}
+
+func renderBlame(ctx *context.Context, blameParts []models.BlamePart, commitNames map[string]models.UserCommit) {
+	repoLink := ctx.Repo.RepoLink
+
+	var lines = make([]string, 0, 0)
+
+	var commitInfo bytes.Buffer
+	var lineNumbers bytes.Buffer
+	var codeLines bytes.Buffer
+
+	var i = 0
+	for pi, part := range blameParts {
+		for index, line := range part.Lines {
+			i++
+			lines = append(lines, line)
+
+			var attr = ""
+			if len(part.Lines)-1 == index && len(blameParts)-1 != pi {
+				attr = " bottom-line"
+			}
+			commit := commitNames[part.Sha]
+			if index == 0 {
+				// User avatar image
+				avatar := ""
+				commitSince := base.TimeSinceUnix(util.TimeStamp(commit.Author.When.Unix()), ctx.Data["Lang"].(string))
+				if commit.User != nil {
+					authorName := commit.Author.Name
+					if len(commit.User.FullName) > 0 {
+						authorName = commit.User.FullName
+					}
+					avatar = fmt.Sprintf(`<a href="%s/%s"><img class="ui avatar image" src="%s" title="%s" alt=""/></a>`, setting.AppSubURL, url.PathEscape(commit.User.Name), commit.User.RelAvatarLink(), html.EscapeString(authorName))
+				} else {
+					avatar = fmt.Sprintf(`<img class="ui avatar image" src="%s" title="%s"/>`, html.EscapeString(base.AvatarLink(commit.Author.Email)), html.EscapeString(commit.Author.Name))
+				}
+				commitInfo.WriteString(fmt.Sprintf(`<div class="blame-info%s"><div class="blame-data"><div class="blame-avatar">%s</div><div class="blame-message"><a href="%s/commit/%s" title="%[5]s">%[5]s</a></div><div class="blame-time">%s</div></div></div>`, attr, avatar, repoLink, part.Sha, html.EscapeString(commit.CommitMessage), commitSince))
+			} else {
+				commitInfo.WriteString(fmt.Sprintf(`<div class="blame-info%s">&#8203;</div>`, attr))
+			}
+
+			//Line number
+			if len(part.Lines)-1 == index && len(blameParts)-1 != pi {
+				lineNumbers.WriteString(fmt.Sprintf(`<span id="L%d" class="bottom-line">%d</span>`, i, i))
+			} else {
+				lineNumbers.WriteString(fmt.Sprintf(`<span id="L%d">%d</span>`, i, i))
+			}
+
+			//Code line
+			line = gotemplate.HTMLEscapeString(line)
+			if i != len(lines) {
+				line += "\n"
+			}
+			if len(part.Lines)-1 == index && len(blameParts)-1 != pi {
+				codeLines.WriteString(fmt.Sprintf(`<li class="L%d bottom-line" rel="L%d">%s</li>`, i, i, line))
+			} else {
+				codeLines.WriteString(fmt.Sprintf(`<li class="L%d" rel="L%d">%s</li>`, i, i, line))
+			}
+		}
+	}
+
+	ctx.Data["BlameContent"] = gotemplate.HTML(codeLines.String())
+	ctx.Data["BlameCommitInfo"] = gotemplate.HTML(commitInfo.String())
+	ctx.Data["BlameLineNums"] = gotemplate.HTML(lineNumbers.String())
+}

routers/routes/routes.go

@@ -849,6 +849,12 @@ func RegisterRoutes(m *macaron.Macaron) {
 			m.Get("/*", context.RepoRefByType(context.RepoRefLegacy), repo.RefCommits)
 		}, repo.MustBeNotEmpty, reqRepoCodeReader)
 
+		m.Group("/blame", func() {
+			m.Get("/branch/*", context.RepoRefByType(context.RepoRefBranch), repo.RefBlame)
+			m.Get("/tag/*", context.RepoRefByType(context.RepoRefTag), repo.RefBlame)
+			m.Get("/commit/*", context.RepoRefByType(context.RepoRefCommit), repo.RefBlame)
+		}, repo.MustBeNotEmpty, reqRepoCodeReader)
+
 		m.Group("", func() {
 			m.Get("/graph", repo.Graph)
 			m.Get("/commit/:sha([a-f0-9]{7,40})$", repo.SetEditorconfigIfExists, repo.SetDiffViewStyle, repo.Diff)

templates/repo/blame.tmpl

@@ -0,0 +1,51 @@
+<div class="tab-size-8 non-diff-file-content">
+
+	<h4 class="ui top attached header" id="repo-read-file">
+		<div class="ui stackable grid">
+			<div class="ten wide column">
+                <i class="file text outline icon ui left"></i>
+                <strong>{{.FileName}}</strong> <span class="text grey normal">{{FileSize .FileSize}}{{if .IsLFSFile}} ({{.i18n.Tr "repo.stored_lfs"}}){{end}}</span>
+			</div>
+			<div class="six wide right aligned column">
+                <div class="ui right file-actions">
+                    <div class="ui buttons">
+                        {{if not .IsViewCommit}}
+                            <a class="ui button" href="{{.RepoLink}}/src/commit/{{.CommitID}}/{{EscapePound .TreePath}}">{{.i18n.Tr "repo.file_permalink"}}</a>
+                        {{end}}
+                        <a class="ui button" href="{{.RepoLink}}/src/{{EscapePound .BranchNameSubURL}}/{{EscapePound .TreePath}}">{{.i18n.Tr "repo.normal_view"}}</a>
+                        <a class="ui button" href="{{.RepoLink}}/commits/{{EscapePound .BranchNameSubURL}}/{{EscapePound .TreePath}}">{{.i18n.Tr "repo.file_history"}}</a>
+                        <a class="ui button" href="{{EscapePound $.RawFileLink}}">{{.i18n.Tr "repo.file_raw"}}</a>
+                    </div>
+                    {{if .Repository.CanEnableEditor}}
+                        {{if .CanEditFile}}
+                            <a href="{{.RepoLink}}/_edit/{{EscapePound .BranchName}}/{{EscapePound .TreePath}}"><i class="octicon octicon-pencil btn-octicon poping up"  data-content="{{.EditFileTooltip}}" data-position="bottom center" data-variation="tiny inverted"></i></a>
+                        {{else}}
+                            <i class="octicon octicon-pencil btn-octicon poping up disabled" data-content="{{.EditFileTooltip}}" data-position="bottom center" data-variation="tiny inverted"></i>
+                        {{end}}
+                        {{if .CanDeleteFile}}
+                            <a href="{{.RepoLink}}/_delete/{{EscapePound .BranchName}}/{{EscapePound .TreePath}}"><i class="octicon octicon-trashcan btn-octicon btn-octicon-danger poping up"  data-content="{{.DeleteFileTooltip}}" data-position="bottom center" data-variation="tiny inverted"></i></a>
+                        {{else}}
+                            <i class="octicon octicon-trashcan btn-octicon poping up disabled" data-content="{{.DeleteFileTooltip}}" data-position="bottom center" data-variation="tiny inverted"></i>
+                        {{end}}
+                    {{end}}
+                </div>
+			</div>
+		</div>
+	</h4>
+
+    <div class="ui attached table unstackable segment">
+        <div class="file-view code-view has-emoji">
+            <table>
+                <tbody>
+                    <tr>
+                        <td class="lines-commit">{{.BlameCommitInfo}}</td>
+                        <td class="lines-num">{{.BlameLineNums}}</td>
+                        <td class="lines-code"><pre><code class="{{.HighlightClass}}"><ol class="linenums">{{.BlameContent}}</ol></code></pre></td>
+                    </tr>
+                </tbody>
+            </table>
+        </div>
+    </div>
+
+
+</div>

templates/repo/home.tmpl

@@ -86,7 +86,7 @@
 							</a>
 						{{end}}
 					{{end}}
-					{{if and (ne $n 0) (not .IsViewFile)}}
+					{{if and (ne $n 0) (not .IsViewFile) (not .IsBlame) }}
 						<a href="{{.RepoLink}}/commits/{{EscapePound .BranchNameSubURL}}/{{EscapePound .TreePath}}" class="ui button">
 							{{.i18n.Tr "repo.file_history"}}
 						</a>
@@ -132,6 +132,8 @@
 		</div>
 		{{if .IsViewFile}}
 			{{template "repo/view_file" .}}
+		{{else if .IsBlame}}
+			{{template "repo/blame" .}}
 		{{else}}
 			{{template "repo/view_list" .}}
 		{{end}}

templates/repo/view_file.tmpl

@@ -21,6 +21,9 @@
 							{{if not .IsViewCommit}}
 								<a class="ui button" href="{{.RepoLink}}/src/commit/{{.CommitID}}/{{EscapePound .TreePath}}">{{.i18n.Tr "repo.file_permalink"}}</a>
 							{{end}}
+							{{if .IsTextFile}}
+								<a class="ui button" href="{{.RepoLink}}/blame/{{EscapePound .BranchNameSubURL}}/{{EscapePound .TreePath}}">{{.i18n.Tr "repo.blame"}}</a>
+							{{end}}
 							<a class="ui button" href="{{.RepoLink}}/commits/{{EscapePound .BranchNameSubURL}}/{{EscapePound .TreePath}}">{{.i18n.Tr "repo.file_history"}}</a>
 							<a class="ui button" href="{{EscapePound $.RawFileLink}}">{{.i18n.Tr "repo.file_raw"}}</a>
 						</div>