Adding upstream version 9.0.0.HEADupstream/9.0.0upstreamdebian

Signed-off-by: Daniel Baumann <daniel@debian.org>

1 files changed, 1258 insertions, 0 deletions

diff --git a/routers/web/repo/view.go b/routers/web/repo/view.go
new file mode 100644
index 0000000..f1445c5
--- /dev/null
+++ b/routers/web/repo/view.go
@@ -0,0 +1,1258 @@
+// Copyright 2017 The Gitea Authors. All rights reserved.
+// Copyright 2014 The Gogs Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package repo
+
+import (
+	"bytes"
+	gocontext "context"
+	"encoding/base64"
+	"errors"
+	"fmt"
+	"html/template"
+	"image"
+	"io"
+	"net/http"
+	"net/url"
+	"path"
+	"slices"
+	"strings"
+	"time"
+
+	_ "image/gif"  // for processing gif images
+	_ "image/jpeg" // for processing jpeg images
+	_ "image/png"  // for processing png images
+
+	activities_model "code.gitea.io/gitea/models/activities"
+	admin_model "code.gitea.io/gitea/models/admin"
+	asymkey_model "code.gitea.io/gitea/models/asymkey"
+	"code.gitea.io/gitea/models/db"
+	git_model "code.gitea.io/gitea/models/git"
+	issue_model "code.gitea.io/gitea/models/issues"
+	repo_model "code.gitea.io/gitea/models/repo"
+	unit_model "code.gitea.io/gitea/models/unit"
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/actions"
+	"code.gitea.io/gitea/modules/base"
+	"code.gitea.io/gitea/modules/charset"
+	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/gitrepo"
+	"code.gitea.io/gitea/modules/highlight"
+	"code.gitea.io/gitea/modules/lfs"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/markup"
+	repo_module "code.gitea.io/gitea/modules/repository"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/structs"
+	"code.gitea.io/gitea/modules/svg"
+	"code.gitea.io/gitea/modules/typesniffer"
+	"code.gitea.io/gitea/modules/util"
+	"code.gitea.io/gitea/routers/web/feed"
+	"code.gitea.io/gitea/services/context"
+	issue_service "code.gitea.io/gitea/services/issue"
+	files_service "code.gitea.io/gitea/services/repository/files"
+
+	"github.com/nektos/act/pkg/model"
+
+	_ "golang.org/x/image/bmp"  // for processing bmp images
+	_ "golang.org/x/image/webp" // for processing webp images
+)
+
+const (
+	tplRepoEMPTY    base.TplName = "repo/empty"
+	tplRepoHome     base.TplName = "repo/home"
+	tplRepoViewList base.TplName = "repo/view_list"
+	tplWatchers     base.TplName = "repo/watchers"
+	tplForks        base.TplName = "repo/forks"
+	tplMigrating    base.TplName = "repo/migrate/migrating"
+)
+
+// locate a README for a tree in one of the supported paths.
+//
+// entries is passed to reduce calls to ListEntries(), so
+// this has precondition:
+//
+//	entries == ctx.Repo.Commit.SubTree(ctx.Repo.TreePath).ListEntries()
+//
+// FIXME: There has to be a more efficient way of doing this
+func FindReadmeFileInEntries(ctx *context.Context, entries []*git.TreeEntry, tryWellKnownDirs bool) (string, *git.TreeEntry, error) {
+	// Create a list of extensions in priority order
+	// 1. Markdown files - with and without localisation - e.g. README.en-us.md or README.md
+	// 2. Org-Mode files - with and without localisation - e.g. README.en-us.org or README.org
+	// 3. Txt files - e.g. README.txt
+	// 4. No extension - e.g. README
+	exts := append(append(localizedExtensions(".md", ctx.Locale.Language()), localizedExtensions(".org", ctx.Locale.Language())...), ".txt", "") // sorted by priority
+	extCount := len(exts)
+	readmeFiles := make([]*git.TreeEntry, extCount+1)
+
+	docsEntries := make([]*git.TreeEntry, 3) // (one of docs/, .gitea/ or .github/)
+	for _, entry := range entries {
+		if tryWellKnownDirs && entry.IsDir() {
+			// as a special case for the top-level repo introduction README,
+			// fall back to subfolders, looking for e.g. docs/README.md, .gitea/README.zh-CN.txt, .github/README.txt, ...
+			// (note that docsEntries is ignored unless we are at the root)
+			lowerName := strings.ToLower(entry.Name())
+			switch lowerName {
+			case "docs":
+				if entry.Name() == "docs" || docsEntries[0] == nil {
+					docsEntries[0] = entry
+				}
+			case ".forgejo":
+				if entry.Name() == ".forgejo" || docsEntries[1] == nil {
+					docsEntries[1] = entry
+				}
+			case ".gitea":
+				if entry.Name() == ".gitea" || docsEntries[1] == nil {
+					docsEntries[1] = entry
+				}
+			case ".github":
+				if entry.Name() == ".github" || docsEntries[2] == nil {
+					docsEntries[2] = entry
+				}
+			}
+			continue
+		}
+		if i, ok := util.IsReadmeFileExtension(entry.Name(), exts...); ok {
+			log.Debug("Potential readme file: %s", entry.Name())
+			if readmeFiles[i] == nil || base.NaturalSortLess(readmeFiles[i].Name(), entry.Blob().Name()) {
+				if entry.IsLink() {
+					target, _, err := entry.FollowLinks()
+					if err != nil && !git.IsErrBadLink(err) {
+						return "", nil, err
+					} else if target != nil && (target.IsExecutable() || target.IsRegular()) {
+						readmeFiles[i] = entry
+					}
+				} else {
+					readmeFiles[i] = entry
+				}
+			}
+		}
+	}
+	var readmeFile *git.TreeEntry
+	for _, f := range readmeFiles {
+		if f != nil {
+			readmeFile = f
+			break
+		}
+	}
+
+	if ctx.Repo.TreePath == "" && readmeFile == nil {
+		for _, subTreeEntry := range docsEntries {
+			if subTreeEntry == nil {
+				continue
+			}
+			subTree := subTreeEntry.Tree()
+			if subTree == nil {
+				// this should be impossible; if subTreeEntry exists so should this.
+				continue
+			}
+			var err error
+			childEntries, err := subTree.ListEntries()
+			if err != nil {
+				return "", nil, err
+			}
+
+			subfolder, readmeFile, err := FindReadmeFileInEntries(ctx, childEntries, false)
+			if err != nil && !git.IsErrNotExist(err) {
+				return "", nil, err
+			}
+			if readmeFile != nil {
+				return path.Join(subTreeEntry.Name(), subfolder), readmeFile, nil
+			}
+		}
+	}
+
+	return "", readmeFile, nil
+}
+
+func renderDirectory(ctx *context.Context) {
+	entries := renderDirectoryFiles(ctx, 1*time.Second)
+	if ctx.Written() {
+		return
+	}
+
+	if ctx.Repo.TreePath != "" {
+		ctx.Data["HideRepoInfo"] = true
+		ctx.Data["Title"] = ctx.Tr("repo.file.title", ctx.Repo.Repository.Name+"/"+ctx.Repo.TreePath, ctx.Repo.RefName)
+	}
+
+	subfolder, readmeFile, err := FindReadmeFileInEntries(ctx, entries, true)
+	if err != nil {
+		ctx.ServerError("findReadmeFileInEntries", err)
+		return
+	}
+
+	renderReadmeFile(ctx, subfolder, readmeFile)
+}
+
+// localizedExtensions prepends the provided language code with and without a
+// regional identifier to the provided extension.
+// Note: the language code will always be lower-cased, if a region is present it must be separated with a `-`
+// Note: ext should be prefixed with a `.`
+func localizedExtensions(ext, languageCode string) (localizedExts []string) {
+	if len(languageCode) < 1 {
+		return []string{ext}
+	}
+
+	lowerLangCode := "." + strings.ToLower(languageCode)
+
+	if strings.Contains(lowerLangCode, "-") {
+		underscoreLangCode := strings.ReplaceAll(lowerLangCode, "-", "_")
+		indexOfDash := strings.Index(lowerLangCode, "-")
+		// e.g. [.zh-cn.md, .zh_cn.md, .zh.md, _zh.md, .md]
+		return []string{lowerLangCode + ext, underscoreLangCode + ext, lowerLangCode[:indexOfDash] + ext, "_" + lowerLangCode[1:indexOfDash] + ext, ext}
+	}
+
+	// e.g. [.en.md, .md]
+	return []string{lowerLangCode + ext, ext}
+}
+
+type fileInfo struct {
+	isTextFile bool
+	isLFSFile  bool
+	fileSize   int64
+	lfsMeta    *lfs.Pointer
+	st         typesniffer.SniffedType
+}
+
+func getFileReader(ctx gocontext.Context, repoID int64, blob *git.Blob) ([]byte, io.ReadCloser, *fileInfo, error) {
+	dataRc, err := blob.DataAsync()
+	if err != nil {
+		return nil, nil, nil, err
+	}
+
+	buf := make([]byte, 1024)
+	n, _ := util.ReadAtMost(dataRc, buf)
+	buf = buf[:n]
+
+	st := typesniffer.DetectContentType(buf)
+	isTextFile := st.IsText()
+
+	// FIXME: what happens when README file is an image?
+	if !isTextFile || !setting.LFS.StartServer {
+		return buf, dataRc, &fileInfo{isTextFile, false, blob.Size(), nil, st}, nil
+	}
+
+	pointer, _ := lfs.ReadPointerFromBuffer(buf)
+	if !pointer.IsValid() { // fallback to plain file
+		return buf, dataRc, &fileInfo{isTextFile, false, blob.Size(), nil, st}, nil
+	}
+
+	meta, err := git_model.GetLFSMetaObjectByOid(ctx, repoID, pointer.Oid)
+	if err != nil { // fallback to plain file
+		log.Warn("Unable to access LFS pointer %s in repo %d: %v", pointer.Oid, repoID, err)
+		return buf, dataRc, &fileInfo{isTextFile, false, blob.Size(), nil, st}, nil
+	}
+
+	dataRc.Close()
+
+	dataRc, err = lfs.ReadMetaObject(pointer)
+	if err != nil {
+		return nil, nil, nil, err
+	}
+
+	buf = make([]byte, 1024)
+	n, err = util.ReadAtMost(dataRc, buf)
+	if err != nil {
+		dataRc.Close()
+		return nil, nil, nil, err
+	}
+	buf = buf[:n]
+
+	st = typesniffer.DetectContentType(buf)
+
+	return buf, dataRc, &fileInfo{st.IsText(), true, meta.Size, &meta.Pointer, st}, nil
+}
+
+func renderReadmeFile(ctx *context.Context, subfolder string, readmeFile *git.TreeEntry) {
+	target := readmeFile
+	if readmeFile != nil && readmeFile.IsLink() {
+		target, _, _ = readmeFile.FollowLinks()
+	}
+	if target == nil {
+		// if findReadmeFile() failed and/or gave us a broken symlink (which it shouldn't)
+		// simply skip rendering the README
+		return
+	}
+
+	ctx.Data["RawFileLink"] = ""
+	ctx.Data["ReadmeInList"] = true
+	ctx.Data["ReadmeExist"] = true
+	ctx.Data["FileIsSymlink"] = readmeFile.IsLink()
+
+	buf, dataRc, fInfo, err := getFileReader(ctx, ctx.Repo.Repository.ID, target.Blob())
+	if err != nil {
+		ctx.ServerError("getFileReader", err)
+		return
+	}
+	defer dataRc.Close()
+
+	ctx.Data["FileIsText"] = fInfo.isTextFile
+	ctx.Data["FileName"] = path.Join(subfolder, readmeFile.Name())
+	ctx.Data["IsLFSFile"] = fInfo.isLFSFile
+
+	if fInfo.isLFSFile {
+		filenameBase64 := base64.RawURLEncoding.EncodeToString([]byte(readmeFile.Name()))
+		ctx.Data["RawFileLink"] = fmt.Sprintf("%s.git/info/lfs/objects/%s/%s", ctx.Repo.Repository.Link(), url.PathEscape(fInfo.lfsMeta.Oid), url.PathEscape(filenameBase64))
+	}
+
+	if !fInfo.isTextFile {
+		return
+	}
+
+	if fInfo.fileSize >= setting.UI.MaxDisplayFileSize {
+		// Pretend that this is a normal text file to display 'This file is too large to be shown'
+		ctx.Data["IsFileTooLarge"] = true
+		ctx.Data["IsTextFile"] = true
+		ctx.Data["FileSize"] = fInfo.fileSize
+		return
+	}
+
+	rd := charset.ToUTF8WithFallbackReader(io.MultiReader(bytes.NewReader(buf), dataRc), charset.ConvertOpts{})
+
+	if markupType := markup.Type(readmeFile.Name()); markupType != "" {
+		ctx.Data["IsMarkup"] = true
+		ctx.Data["MarkupType"] = markupType
+
+		ctx.Data["EscapeStatus"], ctx.Data["FileContent"], err = markupRender(ctx, &markup.RenderContext{
+			Ctx:          ctx,
+			RelativePath: path.Join(ctx.Repo.TreePath, readmeFile.Name()), // ctx.Repo.TreePath is the directory not the Readme so we must append the Readme filename (and path).
+			Links: markup.Links{
+				Base:       ctx.Repo.RepoLink,
+				BranchPath: ctx.Repo.BranchNameSubURL(),
+				TreePath:   path.Join(ctx.Repo.TreePath, subfolder),
+			},
+			Metas:   ctx.Repo.Repository.ComposeDocumentMetas(ctx),
+			GitRepo: ctx.Repo.GitRepo,
+		}, rd)
+		if err != nil {
+			log.Error("Render failed for %s in %-v: %v Falling back to rendering source", readmeFile.Name(), ctx.Repo.Repository, err)
+			delete(ctx.Data, "IsMarkup")
+		}
+	}
+
+	if ctx.Data["IsMarkup"] != true {
+		ctx.Data["IsPlainText"] = true
+		content, err := io.ReadAll(rd)
+		if err != nil {
+			log.Error("Read readme content failed: %v", err)
+		}
+		contentEscaped := template.HTMLEscapeString(util.UnsafeBytesToString(content))
+		ctx.Data["EscapeStatus"], ctx.Data["FileContent"] = charset.EscapeControlHTML(template.HTML(contentEscaped), ctx.Locale, charset.FileviewContext)
+	}
+
+	if !fInfo.isLFSFile && ctx.Repo.CanEnableEditor(ctx, ctx.Doer) {
+		ctx.Data["CanEditReadmeFile"] = true
+	}
+}
+
+func loadLatestCommitData(ctx *context.Context, latestCommit *git.Commit) bool {
+	// Show latest commit info of repository in table header,
+	// or of directory if not in root directory.
+	ctx.Data["LatestCommit"] = latestCommit
+	if latestCommit != nil {
+		verification := asymkey_model.ParseCommitWithSignature(ctx, latestCommit)
+
+		if err := asymkey_model.CalculateTrustStatus(verification, ctx.Repo.Repository.GetTrustModel(), func(user *user_model.User) (bool, error) {
+			return repo_model.IsOwnerMemberCollaborator(ctx, ctx.Repo.Repository, user.ID)
+		}, nil); err != nil {
+			ctx.ServerError("CalculateTrustStatus", err)
+			return false
+		}
+		ctx.Data["LatestCommitVerification"] = verification
+		ctx.Data["LatestCommitUser"] = user_model.ValidateCommitWithEmail(ctx, latestCommit)
+
+		statuses, _, err := git_model.GetLatestCommitStatus(ctx, ctx.Repo.Repository.ID, latestCommit.ID.String(), db.ListOptionsAll)
+		if err != nil {
+			log.Error("GetLatestCommitStatus: %v", err)
+		}
+		if !ctx.Repo.CanRead(unit_model.TypeActions) {
+			git_model.CommitStatusesHideActionsURL(ctx, statuses)
+		}
+
+		ctx.Data["LatestCommitStatus"] = git_model.CalcCommitStatus(statuses)
+		ctx.Data["LatestCommitStatuses"] = statuses
+	}
+
+	return true
+}
+
+func renderFile(ctx *context.Context, entry *git.TreeEntry) {
+	ctx.Data["IsViewFile"] = true
+	ctx.Data["HideRepoInfo"] = true
+	blob := entry.Blob()
+	buf, dataRc, fInfo, err := getFileReader(ctx, ctx.Repo.Repository.ID, blob)
+	if err != nil {
+		ctx.ServerError("getFileReader", err)
+		return
+	}
+	defer dataRc.Close()
+
+	ctx.Data["Title"] = ctx.Tr("repo.file.title", ctx.Repo.Repository.Name+"/"+ctx.Repo.TreePath, ctx.Repo.RefName)
+	ctx.Data["FileIsSymlink"] = entry.IsLink()
+	ctx.Data["FileName"] = blob.Name()
+	ctx.Data["RawFileLink"] = ctx.Repo.RepoLink + "/raw/" + ctx.Repo.BranchNameSubURL() + "/" + util.PathEscapeSegments(ctx.Repo.TreePath)
+
+	if entry.IsLink() {
+		_, link, err := entry.FollowLinks()
+		// Errors should be allowed, because this shouldn't
+		// block rendering invalid symlink files.
+		if err == nil {
+			ctx.Data["SymlinkURL"] = ctx.Repo.RepoLink + "/src/" + ctx.Repo.BranchNameSubURL() + "/" + util.PathEscapeSegments(link)
+		}
+	}
+
+	commit, err := ctx.Repo.Commit.GetCommitByPath(ctx.Repo.TreePath)
+	if err != nil {
+		ctx.ServerError("GetCommitByPath", err)
+		return
+	}
+
+	if !loadLatestCommitData(ctx, commit) {
+		return
+	}
+
+	if ctx.Repo.TreePath == ".editorconfig" {
+		_, editorconfigWarning, editorconfigErr := ctx.Repo.GetEditorconfig(ctx.Repo.Commit)
+		if editorconfigWarning != nil {
+			ctx.Data["FileWarning"] = strings.TrimSpace(editorconfigWarning.Error())
+		}
+		if editorconfigErr != nil {
+			ctx.Data["FileError"] = strings.TrimSpace(editorconfigErr.Error())
+		}
+	} else if issue_service.IsTemplateConfig(ctx.Repo.TreePath) {
+		_, issueConfigErr := issue_service.GetTemplateConfig(ctx.Repo.GitRepo, ctx.Repo.TreePath, ctx.Repo.Commit)
+		if issueConfigErr != nil {
+			ctx.Data["FileError"] = strings.TrimSpace(issueConfigErr.Error())
+		}
+	} else if actions.IsWorkflow(ctx.Repo.TreePath) {
+		content, err := actions.GetContentFromEntry(entry)
+		if err != nil {
+			log.Error("actions.GetContentFromEntry: %v", err)
+		}
+		_, workFlowErr := model.ReadWorkflow(bytes.NewReader(content))
+		if workFlowErr != nil {
+			ctx.Data["FileError"] = ctx.Locale.Tr("actions.runs.invalid_workflow_helper", workFlowErr.Error())
+		}
+	} else if slices.Contains([]string{"CODEOWNERS", "docs/CODEOWNERS", ".gitea/CODEOWNERS"}, ctx.Repo.TreePath) {
+		if data, err := blob.GetBlobContent(setting.UI.MaxDisplayFileSize); err == nil {
+			_, warnings := issue_model.GetCodeOwnersFromContent(ctx, data)
+			if len(warnings) > 0 {
+				ctx.Data["FileWarning"] = strings.Join(warnings, "\n")
+			}
+		}
+	}
+
+	isDisplayingSource := ctx.FormString("display") == "source"
+	isDisplayingRendered := !isDisplayingSource
+
+	if fInfo.isLFSFile {
+		ctx.Data["RawFileLink"] = ctx.Repo.RepoLink + "/media/" + ctx.Repo.BranchNameSubURL() + "/" + util.PathEscapeSegments(ctx.Repo.TreePath)
+	}
+
+	isRepresentableAsText := fInfo.st.IsRepresentableAsText()
+	if !isRepresentableAsText {
+		// If we can't show plain text, always try to render.
+		isDisplayingSource = false
+		isDisplayingRendered = true
+	}
+	ctx.Data["IsLFSFile"] = fInfo.isLFSFile
+	ctx.Data["FileSize"] = fInfo.fileSize
+	ctx.Data["IsTextFile"] = fInfo.isTextFile
+	ctx.Data["IsRepresentableAsText"] = isRepresentableAsText
+	ctx.Data["IsDisplayingSource"] = isDisplayingSource
+	ctx.Data["IsDisplayingRendered"] = isDisplayingRendered
+	ctx.Data["IsExecutable"] = entry.IsExecutable()
+
+	isTextSource := fInfo.isTextFile || isDisplayingSource
+	ctx.Data["IsTextSource"] = isTextSource
+	if isTextSource {
+		ctx.Data["CanCopyContent"] = true
+	}
+
+	// Check LFS Lock
+	lfsLock, err := git_model.GetTreePathLock(ctx, ctx.Repo.Repository.ID, ctx.Repo.TreePath)
+	ctx.Data["LFSLock"] = lfsLock
+	if err != nil {
+		ctx.ServerError("GetTreePathLock", err)
+		return
+	}
+	if lfsLock != nil {
+		u, err := user_model.GetUserByID(ctx, lfsLock.OwnerID)
+		if err != nil {
+			ctx.ServerError("GetTreePathLock", err)
+			return
+		}
+		ctx.Data["LFSLockOwner"] = u.Name
+		ctx.Data["LFSLockOwnerHomeLink"] = u.HomeLink()
+		ctx.Data["LFSLockHint"] = ctx.Tr("repo.editor.this_file_locked")
+	}
+
+	// Assume file is not editable first.
+	if fInfo.isLFSFile {
+		ctx.Data["EditFileTooltip"] = ctx.Tr("repo.editor.cannot_edit_lfs_files")
+	} else if !isRepresentableAsText {
+		ctx.Data["EditFileTooltip"] = ctx.Tr("repo.editor.cannot_edit_non_text_files")
+	}
+
+	switch {
+	case isRepresentableAsText:
+		if fInfo.st.IsSvgImage() {
+			ctx.Data["IsImageFile"] = true
+			ctx.Data["CanCopyContent"] = true
+			ctx.Data["HasSourceRenderedToggle"] = true
+		}
+
+		if fInfo.fileSize >= setting.UI.MaxDisplayFileSize {
+			ctx.Data["IsFileTooLarge"] = true
+			break
+		}
+
+		rd := charset.ToUTF8WithFallbackReader(io.MultiReader(bytes.NewReader(buf), dataRc), charset.ConvertOpts{})
+
+		shouldRenderSource := ctx.FormString("display") == "source"
+		readmeExist := util.IsReadmeFileName(blob.Name())
+		ctx.Data["ReadmeExist"] = readmeExist
+
+		markupType := markup.Type(blob.Name())
+		// If the markup is detected by custom markup renderer it should not be reset later on
+		// to not pass it down to the render context.
+		detected := false
+		if markupType == "" {
+			detected = true
+			markupType = markup.DetectRendererType(blob.Name(), bytes.NewReader(buf))
+		}
+		if markupType != "" {
+			ctx.Data["HasSourceRenderedToggle"] = true
+		}
+
+		if markupType != "" && !shouldRenderSource {
+			ctx.Data["IsMarkup"] = true
+			ctx.Data["MarkupType"] = markupType
+			if !detected {
+				markupType = ""
+			}
+			metas := ctx.Repo.Repository.ComposeDocumentMetas(ctx)
+			metas["BranchNameSubURL"] = ctx.Repo.BranchNameSubURL()
+			ctx.Data["EscapeStatus"], ctx.Data["FileContent"], err = markupRender(ctx, &markup.RenderContext{
+				Ctx:          ctx,
+				Type:         markupType,
+				RelativePath: ctx.Repo.TreePath,
+				Links: markup.Links{
+					Base:       ctx.Repo.RepoLink,
+					BranchPath: ctx.Repo.BranchNameSubURL(),
+					TreePath:   path.Dir(ctx.Repo.TreePath),
+				},
+				Metas:   metas,
+				GitRepo: ctx.Repo.GitRepo,
+			}, rd)
+			if err != nil {
+				ctx.ServerError("Render", err)
+				return
+			}
+			// to prevent iframe load third-party url
+			ctx.Resp.Header().Add("Content-Security-Policy", "frame-src 'self'")
+		} else {
+			buf, _ := io.ReadAll(rd)
+
+			// The Open Group Base Specification: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html
+			//   empty: 0 lines; "a": 1 incomplete-line; "a\n": 1 line; "a\nb": 1 line, 1 incomplete-line;
+			// Forgejo uses the definition (like most modern editors):
+			//   empty: 0 lines; "a": 1 line; "a\n": 1 line; "a\nb": 2 lines;
+			//   When rendering, the last empty line is not rendered in U and isn't counted towards the number of lines.
+			//   To tell users that the file not contains a trailing EOL, text with a tooltip is displayed in the file header.
+			//   Trailing EOL is only considered if the file has content.
+			// This NumLines is only used for the display on the UI: "xxx lines"
+			if len(buf) == 0 {
+				ctx.Data["NumLines"] = 0
+			} else {
+				hasNoTrailingEOL := !bytes.HasSuffix(buf, []byte{'\n'})
+				ctx.Data["HasNoTrailingEOL"] = hasNoTrailingEOL
+
+				numLines := bytes.Count(buf, []byte{'\n'})
+				if hasNoTrailingEOL {
+					numLines++
+				}
+				ctx.Data["NumLines"] = numLines
+			}
+			ctx.Data["NumLinesSet"] = true
+
+			language, err := files_service.TryGetContentLanguage(ctx.Repo.GitRepo, ctx.Repo.CommitID, ctx.Repo.TreePath)
+			if err != nil {
+				log.Error("Unable to get file language for %-v:%s. Error: %v", ctx.Repo.Repository, ctx.Repo.TreePath, err)
+			}
+
+			fileContent, lexerName, err := highlight.File(blob.Name(), language, buf)
+			ctx.Data["LexerName"] = lexerName
+			if err != nil {
+				log.Error("highlight.File failed, fallback to plain text: %v", err)
+				fileContent = highlight.PlainText(buf)
+			}
+			status := &charset.EscapeStatus{}
+			statuses := make([]*charset.EscapeStatus, len(fileContent))
+			for i, line := range fileContent {
+				statuses[i], fileContent[i] = charset.EscapeControlHTML(line, ctx.Locale, charset.FileviewContext)
+				status = status.Or(statuses[i])
+			}
+			ctx.Data["EscapeStatus"] = status
+			ctx.Data["FileContent"] = fileContent
+			ctx.Data["LineEscapeStatus"] = statuses
+		}
+		if !fInfo.isLFSFile {
+			if ctx.Repo.CanEnableEditor(ctx, ctx.Doer) {
+				if lfsLock != nil && lfsLock.OwnerID != ctx.Doer.ID {
+					ctx.Data["CanEditFile"] = false
+					ctx.Data["EditFileTooltip"] = ctx.Tr("repo.editor.this_file_locked")
+				} else {
+					ctx.Data["CanEditFile"] = true
+					ctx.Data["EditFileTooltip"] = ctx.Tr("repo.editor.edit_this_file")
+				}
+			} else if !ctx.Repo.IsViewBranch {
+				ctx.Data["EditFileTooltip"] = ctx.Tr("repo.editor.must_be_on_a_branch")
+			} else if !ctx.Repo.CanWriteToBranch(ctx, ctx.Doer, ctx.Repo.BranchName) {
+				ctx.Data["EditFileTooltip"] = ctx.Tr("repo.editor.fork_before_edit")
+			}
+		}
+
+	case fInfo.st.IsPDF():
+		ctx.Data["IsPDFFile"] = true
+	case fInfo.st.IsVideo():
+		ctx.Data["IsVideoFile"] = true
+	case fInfo.st.IsAudio():
+		ctx.Data["IsAudioFile"] = true
+	case fInfo.st.IsImage() && (setting.UI.SVG.Enabled || !fInfo.st.IsSvgImage()):
+		ctx.Data["IsImageFile"] = true
+		ctx.Data["CanCopyContent"] = true
+	default:
+		if fInfo.fileSize >= setting.UI.MaxDisplayFileSize {
+			ctx.Data["IsFileTooLarge"] = true
+			break
+		}
+
+		if markupType := markup.Type(blob.Name()); markupType != "" {
+			rd := io.MultiReader(bytes.NewReader(buf), dataRc)
+			ctx.Data["IsMarkup"] = true
+			ctx.Data["MarkupType"] = markupType
+			ctx.Data["EscapeStatus"], ctx.Data["FileContent"], err = markupRender(ctx, &markup.RenderContext{
+				Ctx:          ctx,
+				RelativePath: ctx.Repo.TreePath,
+				Links: markup.Links{
+					Base:       ctx.Repo.RepoLink,
+					BranchPath: ctx.Repo.BranchNameSubURL(),
+					TreePath:   path.Dir(ctx.Repo.TreePath),
+				},
+				Metas:   ctx.Repo.Repository.ComposeDocumentMetas(ctx),
+				GitRepo: ctx.Repo.GitRepo,
+			}, rd)
+			if err != nil {
+				ctx.ServerError("Render", err)
+				return
+			}
+		}
+	}
+
+	if ctx.Repo.GitRepo != nil {
+		attrs, err := ctx.Repo.GitRepo.GitAttributes(ctx.Repo.CommitID, ctx.Repo.TreePath, "linguist-vendored", "linguist-generated")
+		if err != nil {
+			log.Error("GitAttributes(%s, %s) failed: %v", ctx.Repo.CommitID, ctx.Repo.TreePath, err)
+		} else {
+			ctx.Data["IsVendored"] = attrs["linguist-vendored"].Bool().Value()
+			ctx.Data["IsGenerated"] = attrs["linguist-generated"].Bool().Value()
+		}
+	}
+
+	if fInfo.st.IsImage() && !fInfo.st.IsSvgImage() {
+		img, _, err := image.DecodeConfig(bytes.NewReader(buf))
+		if err == nil {
+			// There are Image formats go can't decode
+			// Instead of throwing an error in that case, we show the size only when we can decode
+			ctx.Data["ImageSize"] = fmt.Sprintf("%dx%dpx", img.Width, img.Height)
+		}
+	}
+
+	if ctx.Repo.CanEnableEditor(ctx, ctx.Doer) {
+		if lfsLock != nil && lfsLock.OwnerID != ctx.Doer.ID {
+			ctx.Data["CanDeleteFile"] = false
+			ctx.Data["DeleteFileTooltip"] = ctx.Tr("repo.editor.this_file_locked")
+		} else {
+			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.CanWriteToBranch(ctx, ctx.Doer, ctx.Repo.BranchName) {
+		ctx.Data["DeleteFileTooltip"] = ctx.Tr("repo.editor.must_have_write_access")
+	}
+}
+
+func markupRender(ctx *context.Context, renderCtx *markup.RenderContext, input io.Reader) (escaped *charset.EscapeStatus, output template.HTML, err error) {
+	markupRd, markupWr := io.Pipe()
+	defer markupWr.Close()
+	done := make(chan struct{})
+	go func() {
+		sb := &strings.Builder{}
+		// We allow NBSP here this is rendered
+		escaped, _ = charset.EscapeControlReader(markupRd, sb, ctx.Locale, charset.FileviewContext, charset.RuneNBSP)
+		output = template.HTML(sb.String())
+		close(done)
+	}()
+	err = markup.Render(renderCtx, input, markupWr)
+	_ = markupWr.CloseWithError(err)
+	<-done
+	return escaped, output, err
+}
+
+func checkHomeCodeViewable(ctx *context.Context) {
+	if len(ctx.Repo.Units) > 0 {
+		if ctx.Repo.Repository.IsBeingCreated() {
+			task, err := admin_model.GetMigratingTask(ctx, ctx.Repo.Repository.ID)
+			if err != nil {
+				if admin_model.IsErrTaskDoesNotExist(err) {
+					ctx.Data["Repo"] = ctx.Repo
+					ctx.Data["CloneAddr"] = ""
+					ctx.Data["Failed"] = true
+					ctx.HTML(http.StatusOK, tplMigrating)
+					return
+				}
+				ctx.ServerError("models.GetMigratingTask", err)
+				return
+			}
+			cfg, err := task.MigrateConfig()
+			if err != nil {
+				ctx.ServerError("task.MigrateConfig", err)
+				return
+			}
+
+			ctx.Data["Repo"] = ctx.Repo
+			ctx.Data["MigrateTask"] = task
+			ctx.Data["CloneAddr"], _ = util.SanitizeURL(cfg.CloneAddr)
+			ctx.Data["Failed"] = task.Status == structs.TaskStatusFailed
+			ctx.HTML(http.StatusOK, tplMigrating)
+			return
+		}
+
+		if ctx.IsSigned {
+			// Set repo notification-status read if unread
+			if err := activities_model.SetRepoReadBy(ctx, ctx.Repo.Repository.ID, ctx.Doer.ID); err != nil {
+				ctx.ServerError("ReadBy", err)
+				return
+			}
+		}
+
+		var firstUnit *unit_model.Unit
+		for _, repoUnit := range ctx.Repo.Units {
+			if repoUnit.Type == unit_model.TypeCode {
+				return
+			}
+
+			unit, ok := unit_model.Units[repoUnit.Type]
+			if ok && (firstUnit == nil || !firstUnit.IsLessThan(unit)) && repoUnit.Type.CanBeDefault() {
+				firstUnit = &unit
+			}
+		}
+
+		if firstUnit != nil {
+			ctx.Redirect(ctx.Repo.Repository.Link() + firstUnit.URI)
+			return
+		}
+	}
+
+	ctx.NotFound("Home", errors.New(ctx.Locale.TrString("units.error.no_unit_allowed_repo")))
+}
+
+func checkCitationFile(ctx *context.Context, entry *git.TreeEntry) {
+	if entry.Name() != "" {
+		return
+	}
+	tree, err := ctx.Repo.Commit.SubTree(ctx.Repo.TreePath)
+	if err != nil {
+		HandleGitError(ctx, "Repo.Commit.SubTree", err)
+		return
+	}
+	allEntries, err := tree.ListEntries()
+	if err != nil {
+		ctx.ServerError("ListEntries", err)
+		return
+	}
+	for _, entry := range allEntries {
+		if entry.Name() == "CITATION.cff" || entry.Name() == "CITATION.bib" {
+			// Read Citation file contents
+			if content, err := entry.Blob().GetBlobContent(setting.UI.MaxDisplayFileSize); err != nil {
+				log.Error("checkCitationFile: GetBlobContent: %v", err)
+			} else {
+				ctx.Data["CitationExist"] = true
+				ctx.Data["CitationFile"] = entry.Name()
+				ctx.PageData["citationFileContent"] = content
+				break
+			}
+		}
+	}
+}
+
+// Home render repository home page
+func Home(ctx *context.Context) {
+	if setting.Other.EnableFeed {
+		isFeed, _, showFeedType := feed.GetFeedType(ctx.Params(":reponame"), ctx.Req)
+		if isFeed {
+			if ctx.Link == fmt.Sprintf("%s.%s", ctx.Repo.RepoLink, showFeedType) {
+				feed.ShowRepoFeed(ctx, ctx.Repo.Repository, showFeedType)
+				return
+			}
+
+			if ctx.Repo.Repository.IsEmpty {
+				ctx.NotFound("MustBeNotEmpty", nil)
+				return
+			}
+
+			if ctx.Repo.TreePath == "" {
+				feed.ShowBranchFeed(ctx, ctx.Repo.Repository, showFeedType)
+			} else {
+				feed.ShowFileFeed(ctx, ctx.Repo.Repository, showFeedType)
+			}
+			return
+		}
+	}
+
+	checkHomeCodeViewable(ctx)
+	if ctx.Written() {
+		return
+	}
+
+	renderHomeCode(ctx)
+}
+
+// LastCommit returns lastCommit data for the provided branch/tag/commit and directory (in url) and filenames in body
+func LastCommit(ctx *context.Context) {
+	checkHomeCodeViewable(ctx)
+	if ctx.Written() {
+		return
+	}
+
+	renderDirectoryFiles(ctx, 0)
+	if ctx.Written() {
+		return
+	}
+
+	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)-2]
+		}
+	}
+	branchLink := ctx.Repo.RepoLink + "/src/" + ctx.Repo.BranchNameSubURL()
+	ctx.Data["BranchLink"] = branchLink
+
+	ctx.HTML(http.StatusOK, tplRepoViewList)
+}
+
+func renderDirectoryFiles(ctx *context.Context, timeout time.Duration) git.Entries {
+	tree, err := ctx.Repo.Commit.SubTree(ctx.Repo.TreePath)
+	if err != nil {
+		HandleGitError(ctx, "Repo.Commit.SubTree", err)
+		return nil
+	}
+
+	ctx.Data["LastCommitLoaderURL"] = ctx.Repo.RepoLink + "/lastcommit/" + url.PathEscape(ctx.Repo.CommitID) + "/" + util.PathEscapeSegments(ctx.Repo.TreePath)
+
+	// Get current entry user currently looking at.
+	entry, err := ctx.Repo.Commit.GetTreeEntryByPath(ctx.Repo.TreePath)
+	if err != nil {
+		HandleGitError(ctx, "Repo.Commit.GetTreeEntryByPath", err)
+		return nil
+	}
+
+	if !entry.IsDir() {
+		HandleGitError(ctx, "Repo.Commit.GetTreeEntryByPath", err)
+		return nil
+	}
+
+	allEntries, err := tree.ListEntries()
+	if err != nil {
+		ctx.ServerError("ListEntries", err)
+		return nil
+	}
+	allEntries.CustomSort(base.NaturalSortLess)
+
+	commitInfoCtx := gocontext.Context(ctx)
+	if timeout > 0 {
+		var cancel gocontext.CancelFunc
+		commitInfoCtx, cancel = gocontext.WithTimeout(ctx, timeout)
+		defer cancel()
+	}
+
+	files, latestCommit, err := allEntries.GetCommitsInfo(commitInfoCtx, ctx.Repo.Commit, ctx.Repo.TreePath)
+	if err != nil {
+		ctx.ServerError("GetCommitsInfo", err)
+		return nil
+	}
+	ctx.Data["Files"] = files
+	for _, f := range files {
+		if f.Commit == nil {
+			ctx.Data["HasFilesWithoutLatestCommit"] = true
+			break
+		}
+	}
+
+	if !loadLatestCommitData(ctx, latestCommit) {
+		return nil
+	}
+
+	branchLink := ctx.Repo.RepoLink + "/src/" + ctx.Repo.BranchNameSubURL()
+	treeLink := branchLink
+
+	if len(ctx.Repo.TreePath) > 0 {
+		treeLink += "/" + util.PathEscapeSegments(ctx.Repo.TreePath)
+	}
+
+	ctx.Data["TreeLink"] = treeLink
+	ctx.Data["SSHDomain"] = setting.SSH.Domain
+
+	return allEntries
+}
+
+func renderLanguageStats(ctx *context.Context) {
+	langs, err := repo_model.GetTopLanguageStats(ctx, ctx.Repo.Repository, 5)
+	if err != nil {
+		ctx.ServerError("Repo.GetTopLanguageStats", err)
+		return
+	}
+
+	ctx.Data["LanguageStats"] = langs
+}
+
+func renderRepoTopics(ctx *context.Context) {
+	topics, _, err := repo_model.FindTopics(ctx, &repo_model.FindTopicOptions{
+		RepoID: ctx.Repo.Repository.ID,
+	})
+	if err != nil {
+		ctx.ServerError("models.FindTopics", err)
+		return
+	}
+	ctx.Data["Topics"] = topics
+}
+
+func prepareOpenWithEditorApps(ctx *context.Context) {
+	var tmplApps []map[string]any
+	apps := setting.Config().Repository.OpenWithEditorApps.Value(ctx)
+	if len(apps) == 0 {
+		apps = setting.DefaultOpenWithEditorApps()
+	}
+	for _, app := range apps {
+		schema, _, _ := strings.Cut(app.OpenURL, ":")
+		var iconHTML template.HTML
+		if schema == "vscode" || schema == "vscodium" || schema == "jetbrains" {
+			iconHTML = svg.RenderHTML(fmt.Sprintf("gitea-open-with-%s", schema), 16, "tw-mr-2")
+		} else {
+			iconHTML = svg.RenderHTML("gitea-git", 16, "tw-mr-2") // TODO: it could support user's customized icon in the future
+		}
+		tmplApps = append(tmplApps, map[string]any{
+			"DisplayName": app.DisplayName,
+			"OpenURL":     app.OpenURL,
+			"IconHTML":    iconHTML,
+		})
+	}
+	ctx.Data["OpenWithEditorApps"] = tmplApps
+}
+
+func renderHomeCode(ctx *context.Context) {
+	ctx.Data["PageIsViewCode"] = true
+	ctx.Data["RepositoryUploadEnabled"] = setting.Repository.Upload.Enabled
+	prepareOpenWithEditorApps(ctx)
+
+	if ctx.Repo.Commit == nil || ctx.Repo.Repository.IsEmpty || ctx.Repo.Repository.IsBroken() {
+		showEmpty := true
+		var err error
+		if ctx.Repo.GitRepo != nil {
+			showEmpty, err = ctx.Repo.GitRepo.IsEmpty()
+			if err != nil {
+				log.Error("GitRepo.IsEmpty: %v", err)
+				ctx.Repo.Repository.Status = repo_model.RepositoryBroken
+				showEmpty = true
+				ctx.Flash.Error(ctx.Tr("error.occurred"), true)
+			}
+		}
+		if showEmpty {
+			ctx.HTML(http.StatusOK, tplRepoEMPTY)
+			return
+		}
+
+		// the repo is not really empty, so we should update the modal in database
+		// such problem may be caused by:
+		// 1) an error occurs during pushing/receiving.  2) the user replaces an empty git repo manually
+		// and even more: the IsEmpty flag is deeply broken and should be removed with the UI changed to manage to cope with empty repos.
+		// it's possible for a repository to be non-empty by that flag but still 500
+		// because there are no branches - only tags -or the default branch is non-extant as it has been 0-pushed.
+		ctx.Repo.Repository.IsEmpty = false
+		if err = repo_model.UpdateRepositoryCols(ctx, ctx.Repo.Repository, "is_empty"); err != nil {
+			ctx.ServerError("UpdateRepositoryCols", err)
+			return
+		}
+		if err = repo_module.UpdateRepoSize(ctx, ctx.Repo.Repository); err != nil {
+			ctx.ServerError("UpdateRepoSize", err)
+			return
+		}
+
+		// the repo's IsEmpty has been updated, redirect to this page to make sure middlewares can get the correct values
+		link := ctx.Link
+		if ctx.Req.URL.RawQuery != "" {
+			link += "?" + ctx.Req.URL.RawQuery
+		}
+		ctx.Redirect(link)
+		return
+	}
+
+	title := ctx.Repo.Repository.Owner.Name + "/" + ctx.Repo.Repository.Name
+	if len(ctx.Repo.Repository.Description) > 0 {
+		title += ": " + ctx.Repo.Repository.Description
+	}
+	ctx.Data["Title"] = title
+
+	// Get Topics of this repo
+	renderRepoTopics(ctx)
+	if ctx.Written() {
+		return
+	}
+
+	// Get current entry user currently looking at.
+	entry, err := ctx.Repo.Commit.GetTreeEntryByPath(ctx.Repo.TreePath)
+	if err != nil {
+		HandleGitError(ctx, "Repo.Commit.GetTreeEntryByPath", err)
+		return
+	}
+
+	checkOutdatedBranch(ctx)
+
+	checkCitationFile(ctx, entry)
+	if ctx.Written() {
+		return
+	}
+
+	renderLanguageStats(ctx)
+	if ctx.Written() {
+		return
+	}
+
+	if entry.IsDir() {
+		renderDirectory(ctx)
+	} else {
+		renderFile(ctx, entry)
+	}
+	if ctx.Written() {
+		return
+	}
+
+	if ctx.Doer != nil {
+		if err := ctx.Repo.Repository.GetBaseRepo(ctx); err != nil {
+			ctx.ServerError("GetBaseRepo", err)
+			return
+		}
+
+		// If the repo is a mirror, don't display recently pushed branches.
+		if ctx.Repo.Repository.IsMirror {
+			goto PostRecentBranchCheck
+		}
+
+		// If pull requests aren't enabled for either the current repo, or its
+		// base, don't display recently pushed branches.
+		if !(ctx.Repo.Repository.AllowsPulls(ctx) ||
+			(ctx.Repo.Repository.BaseRepo != nil && ctx.Repo.Repository.BaseRepo.AllowsPulls(ctx))) {
+			goto PostRecentBranchCheck
+		}
+
+		// Find recently pushed new branches to *this* repo.
+		branches, err := git_model.FindRecentlyPushedNewBranches(ctx, ctx.Repo.Repository.ID, ctx.Doer.ID, ctx.Repo.Repository.DefaultBranch)
+		if err != nil {
+			ctx.ServerError("FindRecentlyPushedBranches", err)
+			return
+		}
+
+		// If this is not a fork, check if the signed in user has a fork, and
+		// check branches there.
+		if !ctx.Repo.Repository.IsFork {
+			repo := repo_model.GetForkedRepo(ctx, ctx.Doer.ID, ctx.Repo.Repository.ID)
+			if repo != nil {
+				baseBranches, err := git_model.FindRecentlyPushedNewBranches(ctx, repo.ID, ctx.Doer.ID, repo.DefaultBranch)
+				if err != nil {
+					ctx.ServerError("FindRecentlyPushedBranches", err)
+					return
+				}
+				branches = append(branches, baseBranches...)
+			}
+		}
+
+		// Filter out branches that have no relation to the default branch of
+		// the repository.
+		var filteredBranches []*git_model.Branch
+		for _, branch := range branches {
+			repo, err := branch.GetRepo(ctx)
+			if err != nil {
+				continue
+			}
+			gitRepo, err := git.OpenRepository(ctx, repo.RepoPath())
+			if err != nil {
+				continue
+			}
+			defer gitRepo.Close()
+			head, err := gitRepo.GetCommit(branch.CommitID)
+			if err != nil {
+				continue
+			}
+			defaultBranch, err := gitrepo.GetDefaultBranch(ctx, repo)
+			if err != nil {
+				continue
+			}
+			defaultBranchHead, err := gitRepo.GetCommit(defaultBranch)
+			if err != nil {
+				continue
+			}
+
+			hasMergeBase, err := head.HasPreviousCommit(defaultBranchHead.ID)
+			if err != nil {
+				continue
+			}
+
+			if hasMergeBase {
+				filteredBranches = append(filteredBranches, branch)
+			}
+		}
+
+		ctx.Data["RecentlyPushedNewBranches"] = filteredBranches
+	}
+
+PostRecentBranchCheck:
+	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)-2]
+		}
+	}
+
+	ctx.Data["Paths"] = paths
+
+	branchLink := ctx.Repo.RepoLink + "/src/" + ctx.Repo.BranchNameSubURL()
+	treeLink := branchLink
+	if len(ctx.Repo.TreePath) > 0 {
+		treeLink += "/" + util.PathEscapeSegments(ctx.Repo.TreePath)
+	}
+	ctx.Data["TreeLink"] = treeLink
+	ctx.Data["TreeNames"] = treeNames
+	ctx.Data["BranchLink"] = branchLink
+	ctx.Data["CodeIndexerDisabled"] = !setting.Indexer.RepoIndexerEnabled
+	ctx.HTML(http.StatusOK, tplRepoHome)
+}
+
+func checkOutdatedBranch(ctx *context.Context) {
+	if !(ctx.Repo.IsAdmin() || ctx.Repo.IsOwner()) {
+		return
+	}
+
+	// get the head commit of the branch since ctx.Repo.CommitID is not always the head commit of `ctx.Repo.BranchName`
+	commit, err := ctx.Repo.GitRepo.GetBranchCommit(ctx.Repo.BranchName)
+	if err != nil {
+		log.Error("GetBranchCommitID: %v", err)
+		// Don't return an error page, as it can be rechecked the next time the user opens the page.
+		return
+	}
+
+	dbBranch, err := git_model.GetBranch(ctx, ctx.Repo.Repository.ID, ctx.Repo.BranchName)
+	if err != nil {
+		log.Error("GetBranch: %v", err)
+		// Don't return an error page, as it can be rechecked the next time the user opens the page.
+		return
+	}
+
+	if dbBranch.CommitID != commit.ID.String() {
+		ctx.Flash.Warning(ctx.Tr("repo.error.broken_git_hook", "https://docs.gitea.com/help/faq#push-hook--webhook--actions-arent-running"), true)
+	}
+}
+
+// RenderUserCards render a page show users according the input template
+func RenderUserCards(ctx *context.Context, total int, getter func(opts db.ListOptions) ([]*user_model.User, error), tpl base.TplName) {
+	page := ctx.FormInt("page")
+	if page <= 0 {
+		page = 1
+	}
+	pager := context.NewPagination(total, setting.MaxUserCardsPerPage, page, 5)
+	ctx.Data["Page"] = pager
+
+	items, err := getter(db.ListOptions{
+		Page:     pager.Paginater.Current(),
+		PageSize: setting.MaxUserCardsPerPage,
+	})
+	if err != nil {
+		ctx.ServerError("getter", err)
+		return
+	}
+	ctx.Data["Cards"] = items
+
+	ctx.HTML(http.StatusOK, tpl)
+}
+
+// Watchers render repository's watch users
+func Watchers(ctx *context.Context) {
+	ctx.Data["Title"] = ctx.Tr("repo.watchers")
+	ctx.Data["CardsTitle"] = ctx.Tr("repo.watchers")
+	ctx.Data["PageIsWatchers"] = true
+
+	RenderUserCards(ctx, ctx.Repo.Repository.NumWatches, func(opts db.ListOptions) ([]*user_model.User, error) {
+		return repo_model.GetRepoWatchers(ctx, ctx.Repo.Repository.ID, opts)
+	}, tplWatchers)
+}
+
+// Stars render repository's starred users
+func Stars(ctx *context.Context) {
+	ctx.Data["Title"] = ctx.Tr("repo.stargazers")
+	ctx.Data["CardsTitle"] = ctx.Tr("repo.stargazers")
+	ctx.Data["PageIsStargazers"] = true
+	RenderUserCards(ctx, ctx.Repo.Repository.NumStars, func(opts db.ListOptions) ([]*user_model.User, error) {
+		return repo_model.GetStargazers(ctx, ctx.Repo.Repository, opts)
+	}, tplWatchers)
+}
+
+// Forks render repository's forked users
+func Forks(ctx *context.Context) {
+	ctx.Data["Title"] = ctx.Tr("repo.forks")
+
+	page := ctx.FormInt("page")
+	if page <= 0 {
+		page = 1
+	}
+
+	pager := context.NewPagination(ctx.Repo.Repository.NumForks, setting.MaxForksPerPage, page, 5)
+	ctx.Data["Page"] = pager
+
+	forks, err := repo_model.GetForks(ctx, ctx.Repo.Repository, db.ListOptions{
+		Page:     pager.Paginater.Current(),
+		PageSize: setting.MaxForksPerPage,
+	})
+	if err != nil {
+		ctx.ServerError("GetForks", err)
+		return
+	}
+
+	for _, fork := range forks {
+		if err = fork.LoadOwner(ctx); err != nil {
+			ctx.ServerError("LoadOwner", err)
+			return
+		}
+	}
+
+	ctx.Data["Forks"] = forks
+
+	ctx.HTML(http.StatusOK, tplForks)
+}