Function resolveSnapshot

packages/bumpy/src/core/snapshot.ts:69–93

(
  rawName: string,
  config: BumpyConfig,
  rootDir: string,
  opts: { tag?: string; now?: Date } = {},
)

 * per-run version suffix for `sha`/`timestamp`. `now` is injectable for deterministic tests.
 */
export function resolveSnapshot(
  rawName: string,
  config: BumpyConfig,
  rootDir: string,
  opts: { tag?: string; now?: Date } = {},
): ResolvedSnapshot {
  const name = sanitizeSnapshotName(rawName);
  const strategy = config.snapshot.versionStrategy;

  let suffix: string;
  if (strategy === 'sha') {
    const sha = shortHeadSha(rootDir);
    if (!sha) {
      throw new Error(
        'Snapshot versionStrategy "sha" needs a git commit to derive the version from, but HEAD could not be resolved.\n' +
          '  Commit your changes (or switch `snapshot.versionStrategy` to "timestamp").',
      );
    }
    suffix = sha;
  } else {
    suffix = utcTimestamp(opts.now ?? new Date());
  }

  return { rawName, name, tag: opts.tag ?? name, strategy, suffix };
}

/** Compose the snapshot version for one target: `<target>-<name>-<suffix>` */
export function snapshotVersion(target: string, snapshot: ResolvedSnapshot): string {