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https://github.com/go-gitea/gitea.git
synced 2024-08-31 22:44:19 -04:00
Finally fix diff names (#13136)
* Finally fix diff names #12771 attempted to fix diff by avoiding the git diff line as it is possible to have an ambiguous line here. #12254 attempted to fix diff by assuming that names would quoted if they needed to be and if one was quoted then both would be. Both of these were wrong. I have now discovered `--src-prefix` and `--dst-prefix` which means that we can set this in such a way to force the git diff to always be unambiguous. Therefore this PR rollsback most of the changes in #12771 and uses these options to fix this. Signed-off-by: Andrew Thornton <art27@cantab.net> * Update services/gitdiff/gitdiff.go * Update services/gitdiff/gitdiff.go * Update modules/repofiles/temp_repo.go * fix test Signed-off-by: Andrew Thornton <art27@cantab.net> Co-authored-by: Lauris BH <lauris@nix.lv>
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@ -292,7 +292,7 @@ func (t *TemporaryUploadRepository) DiffIndex() (*gitdiff.Diff, error) {
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var diff *gitdiff.Diff
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var finalErr error
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if err := git.NewCommand("diff-index", "--cached", "-p", "HEAD").
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if err := git.NewCommand("diff-index", "--src-prefix=\\a/", "--dst-prefix=\\b/", "--cached", "-p", "HEAD").
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RunInDirTimeoutEnvFullPipelineFunc(nil, 30*time.Second, t.basePath, stdoutWriter, stderr, nil, func(ctx context.Context, cancel context.CancelFunc) error {
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_ = stdoutWriter.Close()
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diff, finalErr = gitdiff.ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, stdoutReader)
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@ -483,46 +483,7 @@ func ParsePatch(maxLines, maxLineCharacters, maxFiles int, reader io.Reader) (*D
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}
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line := linebuf.String()
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if strings.HasPrefix(line, "--- ") {
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if line[4] == '"' {
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fmt.Sscanf(line[4:], "%q", &curFile.OldName)
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} else {
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curFile.OldName = line[4:]
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if strings.Contains(curFile.OldName, " ") {
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// Git adds a terminal \t if there is a space in the name
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curFile.OldName = curFile.OldName[:len(curFile.OldName)-1]
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}
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}
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if curFile.OldName[0:2] == "a/" {
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curFile.OldName = curFile.OldName[2:]
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}
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continue
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} else if strings.HasPrefix(line, "+++ ") {
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if line[4] == '"' {
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fmt.Sscanf(line[4:], "%q", &curFile.Name)
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} else {
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curFile.Name = line[4:]
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if strings.Contains(curFile.Name, " ") {
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// Git adds a terminal \t if there is a space in the name
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curFile.Name = curFile.Name[:len(curFile.Name)-1]
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}
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}
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if curFile.Name[0:2] == "b/" {
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curFile.Name = curFile.Name[2:]
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}
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curFile.IsRenamed = (curFile.Name != curFile.OldName) && !(curFile.IsCreated || curFile.IsDeleted)
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if curFile.IsDeleted {
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curFile.Name = curFile.OldName
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curFile.OldName = ""
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} else if curFile.IsCreated {
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curFile.OldName = ""
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}
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continue
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} else if len(line) == 0 {
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continue
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}
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if strings.HasPrefix(line, "+++") || strings.HasPrefix(line, "---") || len(line) == 0 {
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if strings.HasPrefix(line, "+++ ") || strings.HasPrefix(line, "--- ") || len(line) == 0 {
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continue
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}
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@ -610,10 +571,42 @@ func ParsePatch(maxLines, maxLineCharacters, maxFiles int, reader io.Reader) (*D
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break
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}
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// Note: In case file name is surrounded by double quotes (it happens only in git-shell).
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// e.g. diff --git "a/xxx" "b/xxx"
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var a string
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var b string
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rd := strings.NewReader(line[len(cmdDiffHead):])
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char, _ := rd.ReadByte()
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_ = rd.UnreadByte()
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if char == '"' {
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fmt.Fscanf(rd, "%q ", &a)
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if a[0] == '\\' {
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a = a[1:]
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}
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} else {
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fmt.Fscanf(rd, "%s ", &a)
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}
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char, _ = rd.ReadByte()
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_ = rd.UnreadByte()
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if char == '"' {
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fmt.Fscanf(rd, "%q", &b)
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if b[0] == '\\' {
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b = b[1:]
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}
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} else {
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fmt.Fscanf(rd, "%s", &b)
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}
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a = a[2:]
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b = b[2:]
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curFile = &DiffFile{
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Index: len(diff.Files) + 1,
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Type: DiffFileChange,
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Sections: make([]*DiffSection, 0, 10),
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Name: b,
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OldName: a,
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Index: len(diff.Files) + 1,
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Type: DiffFileChange,
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Sections: make([]*DiffSection, 0, 10),
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IsRenamed: a != b,
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}
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diff.Files = append(diff.Files, curFile)
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curFileLinesCount = 0
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@ -622,7 +615,6 @@ func ParsePatch(maxLines, maxLineCharacters, maxFiles int, reader io.Reader) (*D
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curFileLFSPrefix = false
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// Check file diff type and is submodule.
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loop:
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for {
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line, err := input.ReadString('\n')
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if err != nil {
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@ -633,67 +625,29 @@ func ParsePatch(maxLines, maxLineCharacters, maxFiles int, reader io.Reader) (*D
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}
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}
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if curFile.Type != DiffFileRename {
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switch {
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case strings.HasPrefix(line, "new file"):
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curFile.Type = DiffFileAdd
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curFile.IsCreated = true
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case strings.HasPrefix(line, "deleted"):
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curFile.Type = DiffFileDel
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curFile.IsDeleted = true
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case strings.HasPrefix(line, "index"):
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curFile.Type = DiffFileChange
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case strings.HasPrefix(line, "similarity index 100%"):
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curFile.Type = DiffFileRename
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}
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if curFile.Type > 0 && curFile.Type != DiffFileRename {
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if strings.HasSuffix(line, " 160000\n") {
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curFile.IsSubmodule = true
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}
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break
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}
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} else {
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switch {
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case strings.HasPrefix(line, "rename from "):
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if line[12] == '"' {
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fmt.Sscanf(line[12:], "%q", &curFile.OldName)
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} else {
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curFile.OldName = line[12:]
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curFile.OldName = curFile.OldName[:len(curFile.OldName)-1]
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}
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case strings.HasPrefix(line, "rename to "):
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if line[10] == '"' {
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fmt.Sscanf(line[10:], "%q", &curFile.Name)
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} else {
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curFile.Name = line[10:]
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curFile.Name = curFile.Name[:len(curFile.Name)-1]
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}
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curFile.IsRenamed = true
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break loop
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case strings.HasPrefix(line, "copy from "):
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if line[10] == '"' {
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fmt.Sscanf(line[10:], "%q", &curFile.OldName)
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} else {
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curFile.OldName = line[10:]
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curFile.OldName = curFile.OldName[:len(curFile.OldName)-1]
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}
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case strings.HasPrefix(line, "copy to "):
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if line[8] == '"' {
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fmt.Sscanf(line[8:], "%q", &curFile.Name)
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} else {
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curFile.Name = line[8:]
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curFile.Name = curFile.Name[:len(curFile.Name)-1]
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}
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curFile.IsRenamed = true
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curFile.Type = DiffFileCopy
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break loop
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default:
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if strings.HasSuffix(line, " 160000\n") {
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curFile.IsSubmodule = true
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} else {
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break loop
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}
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switch {
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case strings.HasPrefix(line, "copy from "):
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curFile.IsRenamed = true
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curFile.Type = DiffFileCopy
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case strings.HasPrefix(line, "copy to "):
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curFile.IsRenamed = true
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curFile.Type = DiffFileCopy
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case strings.HasPrefix(line, "new file"):
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curFile.Type = DiffFileAdd
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curFile.IsCreated = true
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case strings.HasPrefix(line, "deleted"):
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curFile.Type = DiffFileDel
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curFile.IsDeleted = true
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case strings.HasPrefix(line, "index"):
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curFile.Type = DiffFileChange
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case strings.HasPrefix(line, "similarity index 100%"):
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curFile.Type = DiffFileRename
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}
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if curFile.Type > 0 {
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if strings.HasSuffix(line, " 160000\n") {
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curFile.IsSubmodule = true
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}
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break
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}
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}
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}
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@ -762,7 +716,7 @@ func GetDiffRangeWithWhitespaceBehavior(repoPath, beforeCommitID, afterCommitID
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parentCommit, _ := commit.Parent(0)
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actualBeforeCommitID = parentCommit.ID.String()
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}
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diffArgs := []string{"diff", "-M"}
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diffArgs := []string{"diff", "--src-prefix=\\a/", "--dst-prefix=\\b/", "-M"}
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if len(whitespaceBehavior) != 0 {
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diffArgs = append(diffArgs, whitespaceBehavior)
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}
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@ -90,9 +90,9 @@ func TestParsePatch_singlefile(t *testing.T) {
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tests := []testcase{
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{
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name: "readme.md2readme.md",
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gitdiff: `diff --git "a/README.md" "b/README.md"
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--- a/README.md
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+++ b/README.md
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gitdiff: `diff --git "\\a/README.md" "\\b/README.md"
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--- "\\a/README.md"
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+++ "\\b/README.md"
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@@ -1,3 +1,6 @@
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# gitea-github-migrator
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+
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@ -102,9 +102,10 @@ func TestParsePatch_singlefile(t *testing.T) {
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+ cut off
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+ cut off
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`,
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addition: 4,
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deletion: 1,
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filename: "README.md",
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addition: 4,
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deletion: 1,
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filename: "README.md",
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oldFilename: "README.md",
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},
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{
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name: "A \\ B",
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@ -119,16 +120,17 @@ func TestParsePatch_singlefile(t *testing.T) {
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Docker Pulls
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+ cut off
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+ cut off`,
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addition: 4,
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deletion: 1,
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filename: "A \\ B",
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addition: 4,
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deletion: 1,
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filename: "A \\ B",
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oldFilename: "A \\ B",
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},
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{
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name: "really weird filename",
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gitdiff: `diff --git a/a b/file b/a a/file b/a b/file b/a a/file
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gitdiff: `diff --git "\\a/a b/file b/a a/file" "\\b/a b/file b/a a/file"
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index d2186f1..f5c8ed2 100644
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--- a/a b/file b/a a/file
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+++ b/a b/file b/a a/file
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--- "\\a/a b/file b/a a/file"
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+++ "\\b/a b/file b/a a/file"
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@@ -1,3 +1,2 @@
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Create a weird file.
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@ -141,10 +143,10 @@ index d2186f1..f5c8ed2 100644
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},
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{
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name: "delete file with blanks",
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gitdiff: `diff --git a/file with blanks b/file with blanks
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gitdiff: `diff --git "\\a/file with blanks" "\\b/file with blanks"
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deleted file mode 100644
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index 898651a..0000000
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--- a/file with blanks
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--- "\\a/file with blanks"
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+++ /dev/null
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@@ -1,5 +0,0 @@
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-a blank file
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@ -153,9 +155,10 @@ index 898651a..0000000
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-
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-the 5th line is the last
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`,
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addition: 0,
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deletion: 5,
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filename: "file with blanks",
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addition: 0,
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deletion: 5,
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filename: "file with blanks",
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oldFilename: "file with blanks",
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},
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{
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name: "rename a—as",
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@ -171,7 +174,7 @@ rename to "a\342\200\224as"
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},
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{
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name: "rename with spaces",
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gitdiff: `diff --git a/a b/file b/a a/file b/a b/a a/file b/b file
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gitdiff: `diff --git "\\a/a b/file b/a a/file" "\\b/a b/a a/file b/b file"
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similarity index 100%
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rename from a b/file b/a a/file
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rename to a b/a a/file b/b file
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