Enable show more files in diff for git <2.31 (#17733)
Unfortunately due to a misread on my behalf I missed that git diff only learned --skip-to in version 2.31.0. Thus this functionality was not working on older versions of git. This PR adds a handler that simply allows for us to skip reading the diffs until we find the correct file to skip to. Fix #17731 Signed-off-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath
GitHub
parent
0d69e64e03
commit
931d0cf854
4 changed files with 253 additions and 32 deletions
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@ -302,7 +302,7 @@ func (t *TemporaryUploadRepository) DiffIndex() (*gitdiff.Diff, error) {
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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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diff, finalErr = gitdiff.ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, stdoutReader, "")
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if finalErr != nil {
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log.Error("ParsePatch: %v", finalErr)
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cancel()
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@ -188,7 +188,7 @@ c,d,e`,
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}
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for n, c := range cases {
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diff, err := ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(c.diff))
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diff, err := ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(c.diff), "")
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if err != nil {
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t.Errorf("ParsePatch failed: %s", err)
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}
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@ -694,9 +694,11 @@ func (diff *Diff) LoadComments(issue *models.Issue, currentUser *models.User) er
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const cmdDiffHead = "diff --git "
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// ParsePatch builds a Diff object from a io.Reader and some parameters.
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func ParsePatch(maxLines, maxLineCharacters, maxFiles int, reader io.Reader) (*Diff, error) {
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func ParsePatch(maxLines, maxLineCharacters, maxFiles int, reader io.Reader, skipToFile string) (*Diff, error) {
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var curFile *DiffFile
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skipping := skipToFile != ""
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diff := &Diff{Files: make([]*DiffFile, 0)}
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sb := strings.Builder{}
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@ -721,24 +723,36 @@ parsingLoop:
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// 1. A patch file always begins with `diff --git ` + `a/path b/path` (possibly quoted)
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// if it does not we have bad input!
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if !strings.HasPrefix(line, cmdDiffHead) {
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return diff, fmt.Errorf("Invalid first file line: %s", line)
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return diff, fmt.Errorf("invalid first file line: %s", line)
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}
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// TODO: Handle skipping first n files
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if len(diff.Files) >= maxFiles {
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lastFile := createDiffFile(diff, line)
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diff.End = lastFile.Name
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diff.IsIncomplete = true
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_, err := io.Copy(io.Discard, reader)
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if err != nil {
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// By the definition of io.Copy this never returns io.EOF
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return diff, fmt.Errorf("Copy: %v", err)
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return diff, fmt.Errorf("error during io.Copy: %w", err)
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}
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break parsingLoop
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}
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curFile = createDiffFile(diff, line)
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if skipping {
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if curFile.Name != skipToFile {
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line, err = skipToNextDiffHead(input)
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if err != nil {
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if err == io.EOF {
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return diff, nil
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}
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return diff, err
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}
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continue
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}
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skipping = false
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}
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diff.Files = append(diff.Files, curFile)
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// 2. It is followed by one or more extended header lines:
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@ -892,7 +906,7 @@ parsingLoop:
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lineBytes, isFragment, err = input.ReadLine()
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if err != nil {
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// Now by the definition of ReadLine this cannot be io.EOF
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return diff, fmt.Errorf("Unable to ReadLine: %v", err)
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return diff, fmt.Errorf("unable to ReadLine: %w", err)
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}
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_, _ = sb.Write(lineBytes)
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}
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@ -955,6 +969,36 @@ parsingLoop:
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return diff, nil
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}
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func skipToNextDiffHead(input *bufio.Reader) (line string, err error) {
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// need to skip until the next cmdDiffHead
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isFragment, wasFragment := false, false
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var lineBytes []byte
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for {
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lineBytes, isFragment, err = input.ReadLine()
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if err != nil {
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return
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}
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if wasFragment {
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wasFragment = isFragment
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continue
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}
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if bytes.HasPrefix(lineBytes, []byte(cmdDiffHead)) {
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break
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}
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wasFragment = isFragment
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}
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line = string(lineBytes)
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if isFragment {
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var tail string
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tail, err = input.ReadString('\n')
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if err != nil {
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return
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}
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line += tail
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}
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return
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}
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func parseHunks(curFile *DiffFile, maxLines, maxLineCharacters int, input *bufio.Reader) (lineBytes []byte, isFragment bool, err error) {
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sb := strings.Builder{}
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@ -974,7 +1018,7 @@ func parseHunks(curFile *DiffFile, maxLines, maxLineCharacters int, input *bufio
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_, isFragment, err = input.ReadLine()
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if err != nil {
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// Now by the definition of ReadLine this cannot be io.EOF
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err = fmt.Errorf("Unable to ReadLine: %v", err)
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err = fmt.Errorf("unable to ReadLine: %w", err)
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return
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}
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}
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@ -984,7 +1028,7 @@ func parseHunks(curFile *DiffFile, maxLines, maxLineCharacters int, input *bufio
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if err == io.EOF {
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return
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}
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err = fmt.Errorf("Unable to ReadLine: %v", err)
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err = fmt.Errorf("unable to ReadLine: %w", err)
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return
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}
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if lineBytes[0] == 'd' {
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@ -1006,7 +1050,7 @@ func parseHunks(curFile *DiffFile, maxLines, maxLineCharacters int, input *bufio
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lineBytes, isFragment, err = input.ReadLine()
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if err != nil {
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// Now by the definition of ReadLine this cannot be io.EOF
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err = fmt.Errorf("Unable to ReadLine: %v", err)
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err = fmt.Errorf("unable to ReadLine: %w", err)
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return
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}
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_, _ = sb.Write(lineBytes)
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@ -1037,7 +1081,7 @@ func parseHunks(curFile *DiffFile, maxLines, maxLineCharacters int, input *bufio
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}
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// This is used only to indicate that the current file does not have a terminal newline
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if !bytes.Equal(lineBytes, []byte("\\ No newline at end of file")) {
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err = fmt.Errorf("Unexpected line in hunk: %s", string(lineBytes))
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err = fmt.Errorf("unexpected line in hunk: %s", string(lineBytes))
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return
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}
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// Technically this should be the end the file!
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@ -1106,7 +1150,7 @@ func parseHunks(curFile *DiffFile, maxLines, maxLineCharacters int, input *bufio
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curSection.Lines = append(curSection.Lines, diffLine)
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default:
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// This is unexpected
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err = fmt.Errorf("Unexpected line in hunk: %s", string(lineBytes))
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err = fmt.Errorf("unexpected line in hunk: %s", string(lineBytes))
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return
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}
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@ -1118,7 +1162,7 @@ func parseHunks(curFile *DiffFile, maxLines, maxLineCharacters int, input *bufio
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lineBytes, isFragment, err = input.ReadLine()
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if err != nil {
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// Now by the definition of ReadLine this cannot be io.EOF
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err = fmt.Errorf("Unable to ReadLine: %v", err)
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err = fmt.Errorf("unable to ReadLine: %w", err)
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return
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}
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}
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@ -1279,8 +1323,14 @@ func GetDiffRangeWithWhitespaceBehavior(gitRepo *git.Repository, beforeCommitID,
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diffArgs = append(diffArgs, afterCommitID)
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beforeCommitID = actualBeforeCommitID
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}
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if skipTo != "" {
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// In git 2.31, git diff learned --skip-to which we can use to shortcut skip to file
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// so if we are using at least this version of git we don't have to tell ParsePatch to do
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// the skipping for us
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parsePatchSkipToFile := skipTo
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if skipTo != "" && git.CheckGitVersionAtLeast("2.31") == nil {
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diffArgs = append(diffArgs, "--skip-to="+skipTo)
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parsePatchSkipToFile = ""
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}
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cmd := exec.CommandContext(ctx, git.GitExecutable, diffArgs...)
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@ -1289,19 +1339,19 @@ func GetDiffRangeWithWhitespaceBehavior(gitRepo *git.Repository, beforeCommitID,
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stdout, err := cmd.StdoutPipe()
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if err != nil {
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return nil, fmt.Errorf("StdoutPipe: %v", err)
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return nil, fmt.Errorf("error creating StdoutPipe: %w", err)
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}
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if err = cmd.Start(); err != nil {
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return nil, fmt.Errorf("Start: %v", err)
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return nil, fmt.Errorf("error during Start: %w", err)
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}
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pid := process.GetManager().Add(fmt.Sprintf("GetDiffRange [repo_path: %s]", repoPath), cancel)
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defer process.GetManager().Remove(pid)
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diff, err := ParsePatch(maxLines, maxLineCharacters, maxFiles, stdout)
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diff, err := ParsePatch(maxLines, maxLineCharacters, maxFiles, stdout, parsePatchSkipToFile)
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if err != nil {
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return nil, fmt.Errorf("ParsePatch: %v", err)
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return nil, fmt.Errorf("unable to ParsePatch: %w", err)
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}
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diff.Start = skipTo
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@ -1383,7 +1433,7 @@ func GetDiffRangeWithWhitespaceBehavior(gitRepo *git.Repository, beforeCommitID,
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}
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if err = cmd.Wait(); err != nil {
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return nil, fmt.Errorf("Wait: %v", err)
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return nil, fmt.Errorf("error during cmd.Wait: %w", err)
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}
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separator := "..."
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@ -1418,7 +1468,7 @@ func GetDiffCommitWithWhitespaceBehavior(gitRepo *git.Repository, commitID, skip
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// CommentAsDiff returns c.Patch as *Diff
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func CommentAsDiff(c *models.Comment) (*Diff, error) {
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diff, err := ParsePatch(setting.Git.MaxGitDiffLines,
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setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(c.Patch))
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setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(c.Patch), "")
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if err != nil {
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log.Error("Unable to parse patch: %v", err)
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return nil, err
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@ -104,6 +104,177 @@ func TestDiffToHTML(t *testing.T) {
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}, DiffLineAdd))
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}
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func TestParsePatch_skipTo(t *testing.T) {
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type testcase struct {
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name string
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gitdiff string
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wantErr bool
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addition int
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deletion int
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oldFilename string
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filename string
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skipTo string
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}
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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/A \\ B" "b/A \\ B"
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--- "a/A \\ B"
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+++ "b/A \\ B"
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@@ -1,3 +1,6 @@
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# gitea-github-migrator
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+
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+ Build Status
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- Latest Release
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Docker Pulls
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+ cut off
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+ cut off
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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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+ Build Status
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- Latest Release
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Docker Pulls
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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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oldFilename: "README.md",
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skipTo: "README.md",
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},
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{
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name: "A \\ B",
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gitdiff: `diff --git "a/A \\ B" "b/A \\ B"
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--- "a/A \\ B"
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+++ "b/A \\ B"
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@@ -1,3 +1,6 @@
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# gitea-github-migrator
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+
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+ Build Status
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- Latest Release
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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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oldFilename: "A \\ B",
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skipTo: "A \\ B",
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},
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{
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name: "A \\ B",
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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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+ Build Status
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- Latest Release
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Docker Pulls
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+ cut off
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+ cut off
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diff --git "a/A \\ B" "b/A \\ B"
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--- "a/A \\ B"
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+++ "b/A \\ B"
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@@ -1,3 +1,6 @@
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# gitea-github-migrator
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+
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+ Build Status
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- Latest Release
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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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oldFilename: "A \\ B",
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skipTo: "A \\ B",
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},
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{
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name: "readme.md2readme.md",
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gitdiff: `diff --git "a/A \\ B" "b/A \\ B"
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--- "a/A \\ B"
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+++ "b/A \\ B"
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@@ -1,3 +1,6 @@
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# gitea-github-migrator
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+
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+ Build Status
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- Latest Release
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Docker Pulls
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+ cut off
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+ cut off
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diff --git "a/A \\ B" "b/A \\ B"
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--- "a/A \\ B"
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+++ "b/A \\ B"
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@@ -1,3 +1,6 @@
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# gitea-github-migrator
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+
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+ Build Status
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- Latest Release
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Docker Pulls
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+ cut off
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+ cut off
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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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+ Build Status
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- Latest Release
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Docker Pulls
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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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oldFilename: "README.md",
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skipTo: "README.md",
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},
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}
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for _, testcase := range tests {
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t.Run(testcase.name, func(t *testing.T) {
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got, err := ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(testcase.gitdiff), testcase.skipTo)
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if (err != nil) != testcase.wantErr {
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t.Errorf("ParsePatch(%q) error = %v, wantErr %v", testcase.name, err, testcase.wantErr)
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return
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}
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gotMarshaled, _ := json.MarshalIndent(got, "", " ")
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if got.NumFiles != 1 {
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t.Errorf("ParsePath(%q) did not receive 1 file:\n%s", testcase.name, string(gotMarshaled))
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return
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}
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if got.TotalAddition != testcase.addition {
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t.Errorf("ParsePath(%q) does not have correct totalAddition %d, wanted %d", testcase.name, got.TotalAddition, testcase.addition)
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}
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if got.TotalDeletion != testcase.deletion {
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t.Errorf("ParsePath(%q) did not have correct totalDeletion %d, wanted %d", testcase.name, got.TotalDeletion, testcase.deletion)
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}
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file := got.Files[0]
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if file.Addition != testcase.addition {
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t.Errorf("ParsePath(%q) does not have correct file addition %d, wanted %d", testcase.name, file.Addition, testcase.addition)
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}
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if file.Deletion != testcase.deletion {
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t.Errorf("ParsePath(%q) did not have correct file deletion %d, wanted %d", testcase.name, file.Deletion, testcase.deletion)
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}
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if file.OldName != testcase.oldFilename {
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t.Errorf("ParsePath(%q) did not have correct OldName %q, wanted %q", testcase.name, file.OldName, testcase.oldFilename)
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}
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if file.Name != testcase.filename {
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t.Errorf("ParsePath(%q) did not have correct Name %q, wanted %q", testcase.name, file.Name, testcase.filename)
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}
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})
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}
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}
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func TestParsePatch_singlefile(t *testing.T) {
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type testcase struct {
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name string
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@ -295,7 +466,7 @@ index 6961180..9ba1a00 100644
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for _, testcase := range tests {
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t.Run(testcase.name, func(t *testing.T) {
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got, err := ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(testcase.gitdiff))
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got, err := ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(testcase.gitdiff), "")
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if (err != nil) != testcase.wantErr {
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t.Errorf("ParsePatch(%q) error = %v, wantErr %v", testcase.name, err, testcase.wantErr)
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return
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@ -344,21 +515,21 @@ index 0000000..6bb8f39
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diffBuilder.WriteString("+line" + strconv.Itoa(i) + "\n")
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}
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diff = diffBuilder.String()
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result, err := ParsePatch(20, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff))
|
||||
result, err := ParsePatch(20, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff), "")
|
||||
if err != nil {
|
||||
t.Errorf("There should not be an error: %v", err)
|
||||
}
|
||||
if !result.Files[0].IsIncomplete {
|
||||
t.Errorf("Files should be incomplete! %v", result.Files[0])
|
||||
}
|
||||
result, err = ParsePatch(40, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff))
|
||||
result, err = ParsePatch(40, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff), "")
|
||||
if err != nil {
|
||||
t.Errorf("There should not be an error: %v", err)
|
||||
}
|
||||
if result.Files[0].IsIncomplete {
|
||||
t.Errorf("Files should not be incomplete! %v", result.Files[0])
|
||||
}
|
||||
result, err = ParsePatch(40, 5, setting.Git.MaxGitDiffFiles, strings.NewReader(diff))
|
||||
result, err = ParsePatch(40, 5, setting.Git.MaxGitDiffFiles, strings.NewReader(diff), "")
|
||||
if err != nil {
|
||||
t.Errorf("There should not be an error: %v", err)
|
||||
}
|
||||
|
|
@ -389,14 +560,14 @@ index 0000000..6bb8f39
|
|||
diffBuilder.WriteString("+line" + strconv.Itoa(35) + "\n")
|
||||
diff = diffBuilder.String()
|
||||
|
||||
result, err = ParsePatch(20, 4096, setting.Git.MaxGitDiffFiles, strings.NewReader(diff))
|
||||
result, err = ParsePatch(20, 4096, setting.Git.MaxGitDiffFiles, strings.NewReader(diff), "")
|
||||
if err != nil {
|
||||
t.Errorf("There should not be an error: %v", err)
|
||||
}
|
||||
if !result.Files[0].IsIncomplete {
|
||||
t.Errorf("Files should be incomplete! %v", result.Files[0])
|
||||
}
|
||||
result, err = ParsePatch(40, 4096, setting.Git.MaxGitDiffFiles, strings.NewReader(diff))
|
||||
result, err = ParsePatch(40, 4096, setting.Git.MaxGitDiffFiles, strings.NewReader(diff), "")
|
||||
if err != nil {
|
||||
t.Errorf("There should not be an error: %v", err)
|
||||
}
|
||||
|
|
@ -415,7 +586,7 @@ index 0000000..6bb8f39
|
|||
Docker Pulls
|
||||
+ cut off
|
||||
+ cut off`
|
||||
result, err = ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff))
|
||||
result, err = ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff), "")
|
||||
if err != nil {
|
||||
t.Errorf("ParsePatch failed: %s", err)
|
||||
}
|
||||
|
|
@ -432,7 +603,7 @@ index 0000000..6bb8f39
|
|||
Docker Pulls
|
||||
+ cut off
|
||||
+ cut off`
|
||||
result, err = ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff2))
|
||||
result, err = ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff2), "")
|
||||
if err != nil {
|
||||
t.Errorf("ParsePatch failed: %s", err)
|
||||
}
|
||||
|
|
@ -449,7 +620,7 @@ index 0000000..6bb8f39
|
|||
Docker Pulls
|
||||
+ cut off
|
||||
+ cut off`
|
||||
result, err = ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff2a))
|
||||
result, err = ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff2a), "")
|
||||
if err != nil {
|
||||
t.Errorf("ParsePatch failed: %s", err)
|
||||
}
|
||||
|
|
@ -466,7 +637,7 @@ index 0000000..6bb8f39
|
|||
Docker Pulls
|
||||
+ cut off
|
||||
+ cut off`
|
||||
result, err = ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff3))
|
||||
result, err = ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(diff3), "")
|
||||
if err != nil {
|
||||
t.Errorf("ParsePatch failed: %s", err)
|
||||
}
|
||||
|
|
@ -557,6 +728,6 @@ func TestNoCrashes(t *testing.T) {
|
|||
}
|
||||
for _, testcase := range tests {
|
||||
// It shouldn't crash, so don't care about the output.
|
||||
ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(testcase.gitdiff))
|
||||
ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(testcase.gitdiff), "")
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Reference in a new issue