Method RawDiff

git/api/diff.go:160–268

nolint:gocognit

(
	ctx context.Context,
	w io.Writer,
	repoPath string,
	baseRef string,
	headRef string,
	mergeBase bool,
	ignoreWhitespace bool,
	alternates []string,
	files ...FileDiffRequest,
)

//nolint:gocognit
func (g *Git) RawDiff(
	ctx context.Context,
	w io.Writer,
	repoPath string,
	baseRef string,
	headRef string,
	mergeBase bool,
	ignoreWhitespace bool,
	alternates []string,
	files ...FileDiffRequest,
) error {
	if repoPath == "" {
		return ErrRepositoryPathEmpty
	}

	baseTag, err := g.GetAnnotatedTag(ctx, repoPath, baseRef)
	if err == nil {
		baseRef = baseTag.TargetSHA.String()
	}

	headTag, err := g.GetAnnotatedTag(ctx, repoPath, headRef)
	if err == nil {
		headRef = headTag.TargetSHA.String()
	}

	cmd := command.New("diff",
		command.WithFlag("-M"),
		command.WithFlag("--full-index"),
		command.WithAlternateObjectDirs(alternates...),
	)
	if mergeBase {
		cmd.Add(command.WithFlag("--merge-base"))
	}

	if ignoreWhitespace {
		// Ignore whitespace when comparing lines.
		cmd.Add(command.WithFlag("-w"))
	}

	perFileDiffRequired := false
	paths := make([]string, 0, len(files))
	if len(files) > 0 {
		for _, file := range files {
			paths = append(paths, file.Path)
			if file.StartLine > 0 || file.EndLine > 0 {
				perFileDiffRequired = true
			}
		}
	}

	processed := 0

again:
	startLine := 0
	endLine := 0

	newCmd := cmd.Clone()