Function getBumpFileCreationOrder

packages/bumpy/src/core/bump-file.ts:95–124

* Use `git log` to get the commit timestamp when each bump file was first added. * Returns a map of bump file ID → unix timestamp (seconds).

(rootDir: string)

 * Returns a map of bump file ID → unix timestamp (seconds).
 */
function getBumpFileCreationOrder(rootDir: string): Map<string, number> {
  const order = new Map<string, number>();

  // git log with --diff-filter=A shows only commits that added files
  // --format="%at" gives unix timestamp, --name-only lists files
  const result = tryRunArgs(['git', 'log', '--diff-filter=A', '--format=%at', '--name-only', '--', '.bumpy/*.md'], {
    cwd: rootDir,
  });
  if (!result) return order;

  // Output format: timestamp line, then filename lines, then blank line, repeat
  let currentTimestamp = 0;
  for (const line of result.split('\n')) {
    const trimmed = line.trim();
    if (!trimmed) continue;
    if (/^\d+$/.test(trimmed)) {
      currentTimestamp = parseInt(trimmed, 10);
    } else if (trimmed.startsWith('.bumpy/') && trimmed.endsWith('.md')) {
      // Use the basename as the ID — bump files keep their ID when moved into
      // a channel subdir, and the move shows up as a new "A" entry, so taking
      // the oldest timestamp below preserves the original creation order.
      const id = fileToId(trimmed);
      // Only record the first (oldest) commit — git log is newest-first,
      // so later entries overwrite with earlier timestamps
      order.set(id, currentTimestamp);
    }
  }

  return order;
}

/** Parse a single bump file from disk */
export async function parseBumpFileFromPath(filePath: string): Promise<BumpFileParseResult> {