Review

Exceptional return value of java.io.File.mkdirs() ignored.

• missing/condition/value_or_state

com/google/javascript/jscomp/AbstractCommandLineRunner.java

maybeCreateDirsForPath(String)

class AbstractCommandLineRunner {
  /**
   * Creates any directories necessary to write a file that will have a given
   * path prefix.
   */
  private static void maybeCreateDirsForPath(String pathPrefix) {
    if (pathPrefix.length() > 0) {
      String dirName =
          pathPrefix.charAt(pathPrefix.length() - 1) == File.separatorChar
              ? pathPrefix.substring(0, pathPrefix.length() - 1) : new File(
                  pathPrefix).getParent();
      if (dirName != null) {
        new File(dirName).mkdirs();
      }
    }
  }

}