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forgejo/routers/web/repo/blame.go

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// 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 (
"fmt"
gotemplate "html/template"
"net/http"
"net/url"
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"strings"
repo_model "code.gitea.io/gitea/models/repo"
user_model "code.gitea.io/gitea/models/user"
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"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/charset"
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"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/templates"
"code.gitea.io/gitea/modules/timeutil"
"code.gitea.io/gitea/modules/util"
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)
const (
tplBlame base.TplName = "repo/home"
)
type blameRow struct {
RowNumber int
Avatar gotemplate.HTML
RepoLink string
PartSha string
PreviousSha string
PreviousShaURL string
IsFirstCommit bool
CommitURL string
CommitMessage string
CommitSince gotemplate.HTML
Code gotemplate.HTML
EscapeStatus charset.EscapeStatus
}
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// 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
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 += "/" + util.PathEscapeSegments(ctx.Repo.TreePath)
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}
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]
}
}
// 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["Paths"] = paths
ctx.Data["TreeLink"] = treeLink
ctx.Data["TreeNames"] = treeNames
ctx.Data["BranchLink"] = branchLink
ctx.Data["RawFileLink"] = rawLink + "/" + util.PathEscapeSegments(ctx.Repo.TreePath)
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ctx.Data["PageIsViewCode"] = true
ctx.Data["IsBlame"] = true
ctx.Data["FileSize"] = blob.Size()
ctx.Data["FileName"] = blob.Name()
ctx.Data["NumLines"], err = blob.GetBlobLineCount()
if err != nil {
ctx.NotFound("GetBlobLineCount", err)
return
}
blameReader, err := git.CreateBlameReader(ctx, repo_model.RepoPath(userName, repoName), commitID, fileName)
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if err != nil {
ctx.NotFound("CreateBlameReader", err)
return
}
defer blameReader.Close()
blameParts := make([]git.BlamePart, 0)
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for {
blamePart, err := blameReader.NextPart()
if err != nil {
ctx.NotFound("NextPart", err)
return
}
if blamePart == nil {
break
}
blameParts = append(blameParts, *blamePart)
}
// Get Topics of this repo
renderRepoTopics(ctx)
if ctx.Written() {
return
}
commitNames, previousCommits := processBlameParts(ctx, blameParts)
if ctx.Written() {
return
}
renderBlame(ctx, blameParts, commitNames, previousCommits)
ctx.HTML(http.StatusOK, tplBlame)
}
func processBlameParts(ctx *context.Context, blameParts []git.BlamePart) (map[string]*user_model.UserCommit, map[string]string) {
// store commit data by SHA to look up avatar info etc
commitNames := make(map[string]*user_model.UserCommit)
// previousCommits contains links from SHA to parent SHA,
// if parent also contains the current TreePath.
previousCommits := make(map[string]string)
// and as blameParts can reference the same commits multiple
// times, we cache the lookup work locally
commits := make([]*git.Commit, 0, len(blameParts))
commitCache := map[string]*git.Commit{}
commitCache[ctx.Repo.Commit.ID.String()] = ctx.Repo.Commit
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for _, part := range blameParts {
sha := part.Sha
if _, ok := commitNames[sha]; ok {
continue
}
// find the blamePart commit, to look up parent & email address for avatars
commit, ok := commitCache[sha]
var err error
if !ok {
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 nil, nil
}
commitCache[sha] = commit
}
// find parent commit
if commit.ParentCount() > 0 {
psha := commit.Parents[0]
previousCommit, ok := commitCache[psha.String()]
if !ok {
previousCommit, _ = commit.Parent(0)
if previousCommit != nil {
commitCache[psha.String()] = previousCommit
}
}
// only store parent commit ONCE, if it has the file
if previousCommit != nil {
if haz1, _ := previousCommit.HasFile(ctx.Repo.TreePath); haz1 {
previousCommits[commit.ID.String()] = previousCommit.ID.String()
}
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}
}
commits = append(commits, commit)
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}
// populate commit email addresses to later look up avatars.
for _, c := range user_model.ValidateCommitsWithEmails(commits) {
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commitNames[c.ID.String()] = c
}
return commitNames, previousCommits
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}
func renderBlame(ctx *context.Context, blameParts []git.BlamePart, commitNames map[string]*user_model.UserCommit, previousCommits map[string]string) {
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repoLink := ctx.Repo.RepoLink
language := ""
indexFilename, worktree, deleteTemporaryFile, err := ctx.Repo.GitRepo.ReadTreeToTemporaryIndex(ctx.Repo.CommitID)
if err == nil {
defer deleteTemporaryFile()
filename2attribute2info, err := ctx.Repo.GitRepo.CheckAttribute(git.CheckAttributeOpts{
CachedOnly: true,
Attributes: []string{"linguist-language", "gitlab-language"},
Filenames: []string{ctx.Repo.TreePath},
IndexFile: indexFilename,
WorkTree: worktree,
})
if err != nil {
log.Error("Unable to load attributes for %-v:%s. Error: %v", ctx.Repo.Repository, ctx.Repo.TreePath, err)
}
language = filename2attribute2info[ctx.Repo.TreePath]["linguist-language"]
if language == "" || language == "unspecified" {
language = filename2attribute2info[ctx.Repo.TreePath]["gitlab-language"]
}
if language == "unspecified" {
language = ""
}
}
lines := make([]string, 0)
rows := make([]*blameRow, 0)
escapeStatus := charset.EscapeStatus{}
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i := 0
commitCnt := 0
for _, part := range blameParts {
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for index, line := range part.Lines {
i++
lines = append(lines, line)
br := &blameRow{
RowNumber: i,
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}
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commit := commitNames[part.Sha]
previousSha := previousCommits[part.Sha]
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if index == 0 {
// Count commit number
commitCnt++
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// User avatar image
commitSince := timeutil.TimeSinceUnix(timeutil.TimeStamp(commit.Author.When.Unix()), ctx.Locale.Language())
var avatar string
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if commit.User != nil {
avatar = string(templates.Avatar(commit.User, 18, "mr-3"))
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} else {
avatar = string(templates.AvatarByEmail(commit.Author.Email, commit.Author.Name, 18, "mr-3"))
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}
br.Avatar = gotemplate.HTML(avatar)
br.RepoLink = repoLink
br.PartSha = part.Sha
br.PreviousSha = previousSha
br.PreviousShaURL = fmt.Sprintf("%s/blame/commit/%s/%s", repoLink, url.PathEscape(previousSha), util.PathEscapeSegments(ctx.Repo.TreePath))
br.CommitURL = fmt.Sprintf("%s/commit/%s", repoLink, url.PathEscape(part.Sha))
br.CommitMessage = commit.CommitMessage
br.CommitSince = commitSince
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}
if i != len(lines)-1 {
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line += "\n"
}
fileName := fmt.Sprintf("%v", ctx.Data["FileName"])
line = highlight.Code(fileName, language, line)
br.EscapeStatus, line = charset.EscapeControlString(line)
br.Code = gotemplate.HTML(line)
rows = append(rows, br)
escapeStatus = escapeStatus.Or(br.EscapeStatus)
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}
}
ctx.Data["EscapeStatus"] = escapeStatus
ctx.Data["BlameRows"] = rows
ctx.Data["CommitCnt"] = commitCnt
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}