De-anonymize JS functions

deanon.py

#! /usr/bin/env python

"""
Usage: cat [infile] | python deanon.py > [outfile]

Anonymous functions will be renamed to anon_[lineno]_*
where * is a number that gets incremented for each functionon the line
"""

from sys import stdin, stdout, stderr, argv
import re

if len(argv) > 1:
  lines = open(argv[1]).readlines()
  out = open(argv[1], 'w')
else:
  lines = stdin.readlines()
  out = stdout

x = {}
x["anon_count"] = 0

def make_repl_func(lineno):
  x["anon_line_count"] = 0
  def create_id(match):
    unique_id = str(lineno + 1) + "_" + str(x["anon_line_count"])
    x["anon_line_count"] += 1
    x["anon_count"] += 1
    return "function anon_%s(" % unique_id
  return create_id

for lineno, line in enumerate(lines):
  out.write(re.sub("function *\(", make_repl_func(lineno), line))

stderr.write("De-anonymized %d functions.\n" % x["anon_count"])