Function GetCommitRenames

vcs/git/git_diff.go:124–141

GetCommitRenames returns git's own rename detection for a single commit (old path -> new path, absolute), mirroring `git diff -M`. Old content lives in the commit's first parent.

(repoPath, commitID string)

// path -> new path, absolute), mirroring `git diff -M`. Old content lives in the
// commit's first parent.
func GetCommitRenames(repoPath, commitID string) (map[string]string, error) {
	if !isGitRepository(repoPath) {
		return nil, fmt.Errorf("%s is not a git repository (use 'git init' to initialize)", repoPath)
	}
	if err := validateCommit(repoPath, commitID); err != nil {
		return nil, err
	}
	repoRoot, err := GetRepositoryRoot(repoPath)
	if err != nil {
		return nil, fmt.Errorf("failed to get repository root: %w", err)
	}

	stdout, stderr, err := runGitCommand(repoPath, "diff-tree", "-M", "--no-commit-id", "-r", "--root", "--diff-filter=R", "--name-status", commitID)
	if err != nil {
		return nil, gitCommandError(err, stderr)
	}
	return parseRenameNameStatus(stdout, repoRoot), nil
}

// GetCommitRangeRenames returns git's rename detection between two commits.
func GetCommitRangeRenames(repoPath, fromCommit, toCommit string) (map[string]string, error) {