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Git 2.28 no longer permits diff with ... on unrelated branches (#12364)

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* Git 2.28 no longer permits diff with ... on unrelated branches

Signed-off-by: Andrew Thornton <art27@cantab.net>

* need to check stderr
This commit is contained in:
zeripath 2020-07-29 18:53:04 +01:00 • committed by GitHub
parent f2a6cd6401
commit 2f6aadffa8
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GPG key ID: 4AEE18F83AFDEB23
5 changed files with 68 additions and 12 deletions
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37
modules/git/repo_compare.go
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@ -68,7 +68,7 @@ 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
@ -115,6 +115,15 @@ func (repo *Repository) GetDiffNumChangedFiles(base, head string) (int, error) {
if err := NewCommand("diff", "-z", "--name-only", base+"..."+head).
RunInDirPipeline(repo.Path, w, stderr); err != nil {
if strings.Contains(stderr.String(), "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 -z --name-only base head so let's try that...
w = &lineCountWriter{}
stderr.Reset()
if err = NewCommand("diff", "-z", "--name-only", base, head).RunInDirPipeline(repo.Path, w, stderr); err == nil {
return w.numLines, nil
}
}
return 0, fmt.Errorf("%v: Stderr: %s", err, stderr)
}
return w.numLines, nil
@ -122,7 +131,11 @@ func (repo *Repository) GetDiffNumChangedFiles(base, head string) (int, error) {
// GetDiffShortStat counts number of changed files, number of additions and deletions
func (repo *Repository) GetDiffShortStat(base, head string) (numFiles, totalAdditions, totalDeletions int, err error) {
return GetDiffShortStat(repo.Path, base+"..."+head)
numFiles, totalAdditions, totalDeletions, err = GetDiffShortStat(repo.Path, base+"..."+head)
if err != nil && strings.Contains(err.Error(), "no merge base") {
return GetDiffShortStat(repo.Path, base, head)
}
return
}
// GetDiffShortStat counts number of changed files, number of additions and deletions
@ -193,12 +206,24 @@ 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
}