mirror of
https://github.com/go-gitea/gitea
synced 2025-10-30 19:08:37 +00:00
d2e994db2c
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>
96 lines
3.0 KiB
Go
96 lines
3.0 KiB
Go
// Copyright 2025 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package pull
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import (
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"context"
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"fmt"
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"strconv"
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"time"
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repo_model "code.gitea.io/gitea/models/repo"
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"code.gitea.io/gitea/modules/git"
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"code.gitea.io/gitea/modules/gitrepo"
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"code.gitea.io/gitea/modules/graceful"
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logger "code.gitea.io/gitea/modules/log"
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)
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// CompareInfo represents needed information for comparing references.
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type CompareInfo struct {
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MergeBase string
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BaseCommitID string
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HeadCommitID string
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Commits []*git.Commit
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NumFiles int
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}
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// GetCompareInfo generates and returns compare information between base and head branches of repositories.
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func GetCompareInfo(ctx context.Context, baseRepo, headRepo *repo_model.Repository, headGitRepo *git.Repository, baseBranch, headBranch string, directComparison, fileOnly bool) (_ *CompareInfo, err error) {
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var (
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remoteBranch string
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tmpRemote string
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)
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// We don't need a temporary remote for same repository.
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if headGitRepo.Path != baseRepo.RepoPath() {
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// Add a temporary remote
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tmpRemote = strconv.FormatInt(time.Now().UnixNano(), 10)
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if err = gitrepo.GitRemoteAdd(ctx, headRepo, tmpRemote, baseRepo.RepoPath()); err != nil {
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return nil, fmt.Errorf("GitRemoteAdd: %w", err)
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}
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defer func() {
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if err := gitrepo.GitRemoteRemove(graceful.GetManager().ShutdownContext(), headRepo, tmpRemote); err != nil {
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logger.Error("GetPullRequestInfo: GitRemoteRemove: %v", err)
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}
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}()
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}
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compareInfo := new(CompareInfo)
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compareInfo.HeadCommitID, err = git.GetFullCommitID(ctx, headGitRepo.Path, headBranch)
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if err != nil {
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compareInfo.HeadCommitID = headBranch
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}
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compareInfo.MergeBase, remoteBranch, err = headGitRepo.GetMergeBase(tmpRemote, baseBranch, headBranch)
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if err == nil {
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compareInfo.BaseCommitID, err = git.GetFullCommitID(ctx, headGitRepo.Path, remoteBranch)
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if err != nil {
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compareInfo.BaseCommitID = remoteBranch
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}
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separator := "..."
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baseCommitID := compareInfo.MergeBase
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if directComparison {
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separator = ".."
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baseCommitID = compareInfo.BaseCommitID
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}
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// We have a common base - therefore we know that ... should work
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if !fileOnly {
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compareInfo.Commits, err = headGitRepo.ShowPrettyFormatLogToList(ctx, baseCommitID+separator+headBranch)
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if err != nil {
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return nil, fmt.Errorf("ShowPrettyFormatLogToList: %w", err)
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}
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} else {
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compareInfo.Commits = []*git.Commit{}
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}
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} else {
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compareInfo.Commits = []*git.Commit{}
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compareInfo.MergeBase, err = git.GetFullCommitID(ctx, headGitRepo.Path, remoteBranch)
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if err != nil {
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compareInfo.MergeBase = remoteBranch
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}
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compareInfo.BaseCommitID = compareInfo.MergeBase
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}
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// Count number of changed files.
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// This probably should be removed as we need to use shortstat elsewhere
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// Now there is git diff --shortstat but this appears to be slower than simply iterating with --nameonly
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compareInfo.NumFiles, err = headGitRepo.GetDiffNumChangedFiles(remoteBranch, headBranch, directComparison)
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if err != nil {
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return nil, err
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}
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return compareInfo, nil
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}
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