pyrate.py 文件源码

def main():
    version_info = 'pyrate version ' + __version__
    try:
        if os.environ.get('TESTOLDIMPORTS'):
            raise ImportError()
        import argparse
        parser = argparse.ArgumentParser()
        parser.add_argument('build_file', nargs = '?', default = 'build.py',
            help = 'name of the input file - default: build.py')
        parser.add_argument('-V', '--version', action = 'version', version = version_info)
        parser.add_argument('-M', '--makefile', action = 'store_true', help = 'enable makefile mode')
        parser.add_argument('-o', '--output', nargs = 1, default = None,
            help = 'name of output build file')
        args = parser.parse_args()
        if args.output:
            args.output = args.output[0]
        bfn = args.build_file
    except ImportError:
        optparse = __import__('optparse')
        parser = optparse.OptionParser(usage = 'pyrate [options] build_file')
        parser.add_option('-V', '--version', action='store_true', help = 'display version')
        parser.add_option('-M', '--makefile', action = 'store_true', help = 'enable makefile mode')
        parser.add_option('-o', '--output', default = None,
            help = 'name of output build file', dest='output')
        (args, posargs) = parser.parse_args()
        if len(posargs) > 1:
            sys.stderr.write('too many build_file arguments provided! %s\n' % repr(posargs))
            return os.EX_USAGE
        elif not posargs:
            posargs = ['build.py']
        bfn = posargs[0]
        if args.version:
            sys.stderr.write(version_info + '\n')
            sys.exit(os.EX_OK)

    generate_build_file(bfn, args.output, args.makefile)

################################################################################
# Externals + helper functions
################################################################################