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Move git config/remote to gitrepo package and add global lock to resolve possible conflict when updating repository git config file (#35151)

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Partially fix #32018 

`git config` and `git remote` write operations create a temporary file
named `config.lock`. Since these operations are not atomic, they must
not be run in parallel. If two requests attempt to modify the same
repository concurrently—such as during a compare operation—one may fail
due to the presence of an existing `config.lock` file.

In cases where `config.lock` is left behind due to an unexpected program
exit, a global lock mechanism could allow us to safely remove the stale
lock file when a related error is detected. While this behavior is not
yet implemented in this PR, it is planned for a future enhancement.

---------

Signed-off-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
This commit is contained in:
Lunny Xiao
2025-09-01 11:47:04 -07:00
committed by GitHub
parent 4e1b8db1fc
commit d2e994db2c
19 changed files with 312 additions and 225 deletions
Download Patch File Download Diff File Expand all files Collapse all files

95
services/pull/compare.go Normal file
View File

@@ -0,0 +1,95 @@
// Copyright 2025 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package pull
import (
"context"
"fmt"
"strconv"
"time"
repo_model "code.gitea.io/gitea/models/repo"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/gitrepo"
"code.gitea.io/gitea/modules/graceful"
logger "code.gitea.io/gitea/modules/log"
)
// CompareInfo represents needed information for comparing references.
type CompareInfo struct {
MergeBase string
BaseCommitID string
HeadCommitID string
Commits []*git.Commit
NumFiles int
}
// GetCompareInfo generates and returns compare information between base and head branches of repositories.
func GetCompareInfo(ctx context.Context, baseRepo, headRepo *repo_model.Repository, headGitRepo *git.Repository, baseBranch, headBranch string, directComparison, fileOnly bool) (_ *CompareInfo, err error) {
var (
remoteBranch string
tmpRemote string
)
// We don't need a temporary remote for same repository.
if headGitRepo.Path != baseRepo.RepoPath() {
// Add a temporary remote
tmpRemote = strconv.FormatInt(time.Now().UnixNano(), 10)
if err = gitrepo.GitRemoteAdd(ctx, headRepo, tmpRemote, baseRepo.RepoPath()); err != nil {
return nil, fmt.Errorf("GitRemoteAdd: %w", err)
}
defer func() {
if err := gitrepo.GitRemoteRemove(graceful.GetManager().ShutdownContext(), headRepo, tmpRemote); err != nil {
logger.Error("GetPullRequestInfo: GitRemoteRemove: %v", err)
}
}()
}
compareInfo := new(CompareInfo)
compareInfo.HeadCommitID, err = git.GetFullCommitID(ctx, headGitRepo.Path, headBranch)
if err != nil {
compareInfo.HeadCommitID = headBranch
}
compareInfo.MergeBase, remoteBranch, err = headGitRepo.GetMergeBase(tmpRemote, baseBranch, headBranch)
if err == nil {
compareInfo.BaseCommitID, err = git.GetFullCommitID(ctx, headGitRepo.Path, remoteBranch)
if err != nil {
compareInfo.BaseCommitID = remoteBranch
}
separator := "..."
baseCommitID := compareInfo.MergeBase
if directComparison {
separator = ".."
baseCommitID = compareInfo.BaseCommitID
}
// We have a common base - therefore we know that ... should work
if !fileOnly {
compareInfo.Commits, err = headGitRepo.ShowPrettyFormatLogToList(ctx, baseCommitID+separator+headBranch)
if err != nil {
return nil, fmt.Errorf("ShowPrettyFormatLogToList: %w", err)
}
} else {
compareInfo.Commits = []*git.Commit{}
}
} else {
compareInfo.Commits = []*git.Commit{}
compareInfo.MergeBase, err = git.GetFullCommitID(ctx, headGitRepo.Path, remoteBranch)
if err != nil {
compareInfo.MergeBase = remoteBranch
}
compareInfo.BaseCommitID = compareInfo.MergeBase
}
// Count number of changed files.
// This probably should be removed as we need to use shortstat elsewhere
// Now there is git diff --shortstat but this appears to be slower than simply iterating with --nameonly
compareInfo.NumFiles, err = headGitRepo.GetDiffNumChangedFiles(remoteBranch, headBranch, directComparison)
if err != nil {
return nil, err
}
return compareInfo, nil
}

4
services/pull/pull.go
View File

@@ -141,7 +141,7 @@ func NewPullRequest(ctx context.Context, opts *NewPullRequestOptions) error {
return err
}
compareInfo, err := baseGitRepo.GetCompareInfo(pr.BaseRepo.RepoPath(),
compareInfo, err := GetCompareInfo(ctx, pr.BaseRepo, pr.BaseRepo, baseGitRepo,
git.BranchPrefix+pr.BaseBranch, pr.GetGitHeadRefName(), false, false)
if err != nil {
return err
@@ -1074,7 +1074,7 @@ func GetPullCommits(ctx context.Context, baseGitRepo *git.Repository, doer *user
if pull.HasMerged {
baseBranch = pull.MergeBase
}
prInfo, err := baseGitRepo.GetCompareInfo(pull.BaseRepo.RepoPath(), baseBranch, pull.GetGitHeadRefName(), true, false)
prInfo, err := GetCompareInfo(ctx, pull.BaseRepo, pull.BaseRepo, baseGitRepo, baseBranch, pull.GetGitHeadRefName(), true, false)
if err != nil {
return nil, "", err
}