fonttools/Lib/fontTools/__main__.py

import sys


def main(args=None):
    if args is None:
        args = sys.argv[1:]

    # TODO Handle library-wide options. Eg.:
    # --unicodedata
    # --verbose / other logging stuff

    # TODO Allow a way to run arbitrary modules? Useful for setting
    # library-wide options and calling another library. Eg.:
    #
    #   $ fonttools --unicodedata=... fontmake ...
    #
    # This allows for a git-like command where thirdparty commands
    # can be added.  Should we just try importing the fonttools
    # module first and try without if it fails?

    if len(sys.argv) < 2:
        sys.argv.append("help")
    if sys.argv[1] == "-h" or sys.argv[1] == "--help":
        sys.argv[1] = "help"
    mod = "fontTools." + sys.argv[1]
    sys.argv[1] = sys.argv[0] + " " + sys.argv[1]
    del sys.argv[0]

    import runpy

    runpy.run_module(mod, run_name="__main__")


if __name__ == "__main__":
    sys.exit(main())