Merge "Add --unused parameter to whichgit" into main

        referenced_dirs.add(d)

        prev_dir = d

        break

  return [d[0:-1] for d in referenced_dirs]

  return referenced_dirs

def main(argv):

                  help="The TARGET_BUILD_VARIANTS to check. If not provided just uses whatever has"

                        + " already been built, or eng if --products is supplied")

  ap.add_argument("--modules", nargs="*",

                  help="The build modules to check, or droid it not supplied")

                  help="The build modules to check, or droid if not supplied")

  ap.add_argument("--why", nargs="*",

                  help="Also print the input files used in these projects, or \"*\" for all")

  ap.add_argument("--unused", help="List the unused git projects for the given modules rather than"

                        + "the used ones. Ignores --why", action="store_true")

  args = ap.parse_args(argv[1:])

  modules = args.modules if args.modules else ["droid"]

  sources = sorted(sources)

  if args.unused:

    # Print the list of git directories that don't contain sources

    used_git_dirs = set(get_git_dirs())

    for project in sorted(used_git_dirs.difference(set(get_referenced_projects(used_git_dirs, sources)))):

      print(project[0:-1])

  else:

    # Print the list of git directories that has one or more of the sources in it

    for project in sorted(get_referenced_projects(get_git_dirs(), sources)):

    print(project)

      print(project[0:-1])

      if args.why:

      if "*" in args.why or project in args.why:

        prefix = project + "/"

        if "*" in args.why or project[0:-1] in args.why:

          prefix = project

          for f in sources:

            if f.startswith(prefix):

              print("  " + f)