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Git 2.28 no longer permits diff with ... on unrelated branches (#12370) 

Backport #12364

Signed-off-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath 2020-07-29 17:42:22 +01:00 committed by GitHub
parent 77af0a23c4
commit cc8a7c9345
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 54 additions and 11 deletions
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9
modules/git/commit.go
View File

@ -271,11 +271,12 @@ func AllCommitsCount(repoPath string) (int64, error) {
return strconv.ParseInt(strings.TrimSpace(stdout), 10, 64)
}
func commitsCount(repoPath, revision, relpath string) (int64, error) {
func commitsCount(repoPath string, revision, relpath []string) (int64, error) {
cmd := NewCommand("rev-list", "--count")
cmd.AddArguments(revision)
cmd.AddArguments(revision...)
if len(relpath) > 0 {
cmd.AddArguments("--", relpath)
cmd.AddArguments("--")
cmd.AddArguments(relpath...)
}
stdout, err := cmd.RunInDir(repoPath)
@ -288,7 +289,7 @@ func commitsCount(repoPath, revision, relpath string) (int64, error) {
// CommitsCount returns number of total commits of until given revision.
func CommitsCount(repoPath, revision string) (int64, error) {
return commitsCount(repoPath, revision, "")
return commitsCount(repoPath, []string{revision}, []string{})
}
// CommitsCount returns number of total commits of until current revision.

26
modules/git/repo_commit.go
View File

@ -293,7 +293,7 @@ func (repo *Repository) FileChangedBetweenCommits(filename, id1, id2 string) (bo
// FileCommitsCount return the number of files at a revison
func (repo *Repository) FileCommitsCount(revision, file string) (int64, error) {
return commitsCount(repo.Path, revision, file)
return commitsCount(repo.Path, []string{revision}, []string{file})
}
// CommitsByFileAndRange return the commits according revison file and the page
@ -319,6 +319,11 @@ func (repo *Repository) CommitsByFileAndRangeNoFollow(revision, file string, pag
// FilesCountBetween return the number of files changed between two commits
func (repo *Repository) FilesCountBetween(startCommitID, endCommitID string) (int, error) {
stdout, err := NewCommand("diff", "--name-only", startCommitID+"..."+endCommitID).RunInDir(repo.Path)
if err != nil && strings.Contains(err.Error(), "no merge base") {
// git >= 2.28 now returns an error if startCommitID and endCommitID have become unrelated.
// previously it would return the results of git diff --name-only startCommitID endCommitID so let's try that...
stdout, err = NewCommand("diff", "--name-only", startCommitID, endCommitID).RunInDir(repo.Path)
}
if err != nil {
return 0, err
}
@ -333,6 +338,11 @@ func (repo *Repository) CommitsBetween(last *Commit, before *Commit) (*list.List
stdout, err = NewCommand("rev-list", last.ID.String()).RunInDirBytes(repo.Path)
} else {
stdout, err = NewCommand("rev-list", before.ID.String()+"..."+last.ID.String()).RunInDirBytes(repo.Path)
if err != nil && strings.Contains(err.Error(), "no merge base") {
// future versions of git >= 2.28 are likely to return an error if before and last have become unrelated.
// previously it would return the results of git rev-list before last so let's try that...
stdout, err = NewCommand("rev-list", before.ID.String(), last.ID.String()).RunInDirBytes(repo.Path)
}
}
if err != nil {
return nil, err
@ -348,6 +358,11 @@ func (repo *Repository) CommitsBetweenLimit(last *Commit, before *Commit, limit,
stdout, err = NewCommand("rev-list", "--max-count", strconv.Itoa(limit), "--skip", strconv.Itoa(skip), last.ID.String()).RunInDirBytes(repo.Path)
} else {
stdout, err = NewCommand("rev-list", "--max-count", strconv.Itoa(limit), "--skip", strconv.Itoa(skip), before.ID.String()+"..."+last.ID.String()).RunInDirBytes(repo.Path)
if err != nil && strings.Contains(err.Error(), "no merge base") {
// future versions of git >= 2.28 are likely to return an error if before and last have become unrelated.
// previously it would return the results of git rev-list --max-count n before last so let's try that...
stdout, err = NewCommand("rev-list", "--max-count", strconv.Itoa(limit), "--skip", strconv.Itoa(skip), before.ID.String(), last.ID.String()).RunInDirBytes(repo.Path)
}
}
if err != nil {
return nil, err
@ -373,7 +388,14 @@ func (repo *Repository) CommitsBetweenIDs(last, before string) (*list.List, erro
// CommitsCountBetween return numbers of commits between two commits
func (repo *Repository) CommitsCountBetween(start, end string) (int64, error) {
return commitsCount(repo.Path, start+"..."+end, "")
count, err := commitsCount(repo.Path, []string{start + "..." + end}, []string{})
if err != nil && strings.Contains(err.Error(), "no merge base") {
// future versions of git >= 2.28 are likely to return an error if before and last have become unrelated.
// previously it would return the results of git rev-list before last so let's try that...
return commitsCount(repo.Path, []string{start, end}, []string{})
}
return count, err
}
// commitsBefore the limit is depth, not total number of returned commits.

28
modules/git/repo_compare.go
View File

@ -6,6 +6,7 @@
package git
import (
"bytes"
"container/list"
"fmt"
"io"
@ -66,7 +67,7 @@ func (repo *Repository) GetCompareInfo(basePath, baseBranch, headBranch string)
compareInfo := new(CompareInfo)
compareInfo.MergeBase, remoteBranch, err = repo.GetMergeBase(tmpRemote, baseBranch, headBranch)
if err == nil {
// We have a common base
// We have a common base - therefore we know that ... should work
logs, err := NewCommand("log", compareInfo.MergeBase+"..."+headBranch, prettyLogFormat).RunInDirBytes(repo.Path)
if err != nil {
return nil, err
@ -85,6 +86,11 @@ func (repo *Repository) GetCompareInfo(basePath, baseBranch, headBranch string)
// Count number of changed files.
stdout, err := NewCommand("diff", "--name-only", remoteBranch+"..."+headBranch).RunInDir(repo.Path)
if err != nil && strings.Contains(err.Error(), "no merge base") {
// git >= 2.28 now returns an error if base and head have become unrelated.
// previously it would return the results of git diff --name-only base head so let's try that...
stdout, err = NewCommand("diff", "--name-only", remoteBranch, headBranch).RunInDir(repo.Path)
}
if err != nil {
return nil, err
}
@ -108,12 +114,24 @@ func (repo *Repository) GetDiff(base, head string, w io.Writer) error {
// GetPatch generates and returns format-patch data between given revisions.
func (repo *Repository) GetPatch(base, head string, w io.Writer) error {
return NewCommand("format-patch", "--binary", "--stdout", base+"..."+head).
RunInDirPipeline(repo.Path, w, nil)
stderr := new(bytes.Buffer)
err := NewCommand("format-patch", "--binary", "--stdout", base+"..."+head).
RunInDirPipeline(repo.Path, w, stderr)
if err != nil && bytes.Contains(stderr.Bytes(), []byte("no merge base")) {
return NewCommand("format-patch", "--binary", "--stdout", base, head).
RunInDirPipeline(repo.Path, w, nil)
}
return err
}
// GetDiffFromMergeBase generates and return patch data from merge base to head
func (repo *Repository) GetDiffFromMergeBase(base, head string, w io.Writer) error {
return NewCommand("diff", "-p", "--binary", base+"..."+head).
RunInDirPipeline(repo.Path, w, nil)
stderr := new(bytes.Buffer)
err := NewCommand("diff", "-p", "--binary", base+"..."+head).
RunInDirPipeline(repo.Path, w, stderr)
if err != nil && bytes.Contains(stderr.Bytes(), []byte("no merge base")) {
return NewCommand("diff", "-p", "--binary", base, head).
RunInDirPipeline(repo.Path, w, nil)
}
return err
}

2
routers/private/hook.go
View File

@ -39,6 +39,7 @@ func verifyCommits(oldCommitID, newCommitID string, repo *git.Repository, env []
_ = stdoutWriter.Close()
}()
// This is safe as force pushes are already forbidden
err = git.NewCommand("rev-list", oldCommitID+"..."+newCommitID).
RunInDirTimeoutEnvFullPipelineFunc(env, -1, repo.Path,
stdoutWriter, nil, nil,
@ -70,6 +71,7 @@ func checkFileProtection(oldCommitID, newCommitID string, patterns []glob.Glob,
_ = stdoutWriter.Close()
}()
// This use of ... is safe as force-pushes have already been ruled out.
err = git.NewCommand("diff", "--name-only", oldCommitID+"..."+newCommitID).
RunInDirTimeoutEnvFullPipelineFunc(env, -1, repo.Path,
stdoutWriter, nil, nil,