#! /usr/bin/env python3

"""Keywords (from "graminit.c")

This file is automatically generated; please don't muck it up!

To update the symbols in this file, 'cd' to the top directory of
the python source tree after building the interpreter and run:

 ./python Lib/keyword.py
"""

__all__ = ["iskeyword", "kwlist"]

kwlist = [
#--start keywords--
 'False',
 'None',
 'True',
 'and',
 'as',
 'assert',
 'async',
 'await',
 'break',
 'class',
 'continue',
 'def',
 'del',
 'elif',
 'else',
 'except',
 'finally',
 'for',
 'from',
 'global',
 'if',
 'import',
 'in',
 'is',
 'lambda',
 'nonlocal',
 'not',
 'or',
 'pass',
 'raise',
 'return',
 'try',
 'while',
 'with',
 'yield',
#--end keywords--
 ]

iskeyword = frozenset(kwlist).__contains__

def main():
 import sys, re

 args = sys.argv[1:]
 iptfile = args and args[0] or "Python/graminit.c"
 if len(args) > 1: optfile = args[1]
 else: optfile = "Lib/keyword.py"

 # load the output skeleton from the target, taking care to preserve its
 # newline convention.
 with open(optfile, newline='') as fp:
 format = fp.readlines()
 nl = format[0][len(format[0].strip()):] if format else '\n'

 # scan the source file for keywords
 with open(iptfile) as fp:
 strprog = re.compile('"([^"]+)"')
 lines = []
 for line in fp:
 if '{1, "' in line:
 match = strprog.search(line)
 if match:
 lines.append(" '" + match.group(1) + "'," + nl)
 lines.sort()

 # insert the lines of keywords into the skeleton
 try:
 start = format.index("#--start keywords--" + nl) + 1
 end = format.index("#--end keywords--" + nl)
 format[start:end] = lines
 except ValueError:
 sys.stderr.write("target does not contain format markers\n")
 sys.exit(1)

 # write the output file
 with open(optfile, 'w', newline='') as fp:
 fp.writelines(format)

if __name__ == "__main__":
 main()