1#!/usr/bin/python 2# 3# Copyright (C) 2009 Google Inc. All rights reserved. 4# 5# Redistribution and use in source and binary forms, with or without 6# modification, are permitted provided that the following conditions are 7# met: 8# 9# * Redistributions of source code must retain the above copyright 10# notice, this list of conditions and the following disclaimer. 11# * Redistributions in binary form must reproduce the above 12# copyright notice, this list of conditions and the following disclaimer 13# in the documentation and/or other materials provided with the 14# distribution. 15# * Neither the name of Google Inc. nor the names of its 16# contributors may be used to endorse or promote products derived from 17# this software without specific prior written permission. 18# 19# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30# 31# Copyright (c) 2009 The Chromium Authors. All rights reserved. 32# Use of this source code is governed by a BSD-style license that can be 33# found in the LICENSE file. 34 35# usage: action_maketokenizer.py OUTPUTS -- INPUTS 36# 37# Multiple INPUTS may be listed. The sections are separated by -- arguments. 38# 39# OUTPUTS must contain a single item: a path to tokenizer.cpp. 40# 41# INPUTS must contain exactly two items. The first item must be the path to 42# maketokenizer. The second item must be the path to tokenizer.flex. 43 44 45import os 46import subprocess 47import sys 48 49 50def SplitArgsIntoSections(args): 51 sections = [] 52 while len(args) > 0: 53 if not '--' in args: 54 # If there is no '--' left, everything remaining is an entire section. 55 dashes = len(args) 56 else: 57 dashes = args.index('--') 58 59 sections.append(args[:dashes]) 60 61 # Next time through the loop, look at everything after this '--'. 62 if dashes + 1 == len(args): 63 # If the '--' is at the end of the list, we won't come back through the 64 # loop again. Add an empty section now corresponding to the nothingness 65 # following the final '--'. 66 args = [] 67 sections.append(args) 68 else: 69 args = args[dashes + 1:] 70 71 return sections 72 73 74def main(args): 75 sections = SplitArgsIntoSections(args[1:]) 76 assert len(sections) == 2 77 (outputs, inputs) = sections 78 79 assert len(outputs) == 1 80 output = outputs[0] 81 82 assert len(inputs) == 2 83 maketokenizer = inputs[0] 84 flexInput = inputs[1] 85 86 # Do it. check_call is new in 2.5, so simulate its behavior with call and 87 # assert. 88 outfile = open(output, 'wb') 89 p1 = subprocess.Popen(['flex', '-t', flexInput], stdout=subprocess.PIPE) 90 p2 = subprocess.Popen(['perl', maketokenizer], stdin=p1.stdout, stdout=outfile) 91 92 r1 = p1.wait() 93 r2 = p2.wait() 94 assert r1 == 0 95 assert r2 == 0 96 97 return 0 98 99 100if __name__ == '__main__': 101 sys.exit(main(sys.argv)) 102