Function save

src/cache.ts:134–176

(id: string)

 * @param id ID of the package manager, should be "maven" or "gradle"
 */
export async function save(id: string) {
  const packageManager = findPackageManager(id);
  const matchedKey = core.getState(CACHE_MATCHED_KEY);

  // Inputs are re-evaluated before the post action, so we want the original key used for restore
  const primaryKey = core.getState(STATE_CACHE_PRIMARY_KEY);

  if (!primaryKey) {
    core.warning('Error retrieving key from state.');
    return;
  } else if (matchedKey === primaryKey) {
    // no change in target directories
    core.info(
      `Cache hit occurred on the primary key ${primaryKey}, not saving cache.`
    );
    return;
  }
  try {
    const cacheId = await cache.saveCache(packageManager.path, primaryKey);
    if (cacheId === -1) {
      // saveCache returns -1 without throwing when the cache was not saved,
      // e.g. a reserve collision or a read-only token (fork PR). @actions/cache
      // has already logged the reason at the appropriate severity, so just
      // trace it instead of misreporting that the cache was saved.
      core.debug(`Cache was not saved for the key: ${primaryKey}`);
      return;
    }
    core.info(`Cache saved with the key: ${primaryKey}`);
  } catch (error) {
    const err = error as Error;

    if (err.name === cache.ReserveCacheError.name) {
      core.info(err.message);
    } else {
      if (isProbablyGradleDaemonProblem(packageManager, err)) {
        core.warning(
          'Failed to save Gradle cache on Windows. If tar.exe reported "Permission denied", try to run Gradle with `--no-daemon` option. Refer to https://github.com/actions/cache/issues/454 for details.'
        );
      }
      throw error;
    }
  }
}

/**
 * @param packageManager the specified package manager by user