Function detectReleaseBranch

packages/bumpy/src/core/channels.ts:80–87

(rootDir: string)

 * In GitHub Actions push events, HEAD is often detached — prefer GITHUB_REF_NAME.
 */
export function detectReleaseBranch(rootDir: string): string | null {
  const refName = process.env.GITHUB_REF_NAME;
  const refType = process.env.GITHUB_REF_TYPE;
  if (refName && refType !== 'tag') return refName;
  const branch = getCurrentBranch({ cwd: rootDir });
  if (!branch || branch === 'HEAD') return null; // detached HEAD with no env hint
  return branch;
}

/** Find the channel matching a branch name, if any */
export function matchChannelByBranch(config: BumpyConfig, branch: string | null): ResolvedChannel | null {