chrome_frame/combine_libs.py

   1 #!/usr/bin/env python
   2 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
   3 # Use of this source code is governed by a BSD-style license that can be
   4 # found in the LICENSE file.
   5
   6 # TODO(slightlyoff): move to using shared version of this script.
   7
   8 '''This script makes it easy to combine libs and object files to a new lib,
   9 optionally removing some of the object files in the input libs by regular
  10 expression matching.
  11 For usage information, run the script with a --help argument.
  12 '''
  13 import optparse
  14 import os
  15 import re
  16 import subprocess
  17 import sys
  18
  19
  20 def Shell(*args):
  21   '''Runs the program and args in args, returns the output from the program.'''
  22   process = subprocess.Popen(args,
  23                              stdin = None,
  24                              stdout = subprocess.PIPE,
  25                              stderr = subprocess.STDOUT)
  26   output = process.stdout.readlines()
  27   process.wait()
  28   retcode = process.returncode
  29   if retcode != 0:
  30     raise RuntimeError('%s exited with status %d' % (args[0], retcode))
  31   return output
  32
  33
  34 def CollectRemovals(remove_re, inputs):
  35   '''Returns a list of all object files in inputs that match remove_re.'''
  36   removals = []
  37   for input in inputs:
  38     output = Shell('lib.exe', '/list', input)
  39
  40     for line in output:
  41       line = line.rstrip()
  42       if remove_re.search(line):
  43         removals.append(line)
  44
  45   return removals
  46
  47
  48 def CombineLibraries(output, remove_re, inputs):
  49   '''Combines all the libraries and objects in inputs, while removing any
  50   object files that match remove_re.
  51   '''
  52   removals = []
  53   if remove_re:
  54     removals = CollectRemovals(remove_re, inputs)
  55
  56   print removals
  57
  58   args = ['lib.exe', '/out:%s' % output]
  59   args += ['/remove:%s' % obj for obj in removals]
  60   args += inputs
  61   Shell(*args)
  62
  63
  64 USAGE = '''usage: %prog [options] <lib or obj>+
  65
  66 Combines input libraries or objects into an output library, while removing
  67 any object file (in the input libraries) that matches a given regular
  68 expression.
  69 '''
  70
  71 def GetOptionParser():
  72   parser = optparse.OptionParser(USAGE)
  73   parser.add_option('-o', '--output', dest = 'output',
  74                     help = 'write to this output library')
  75   parser.add_option('-r', '--remove', dest = 'remove',
  76                     help = 'object files matching this regexp will be removed '
  77                             'from the output library')
  78   return parser
  79
  80
  81 def Main():
  82   '''Main function for this script'''
  83   parser = GetOptionParser()
  84   (opt, args) = parser.parse_args()
  85   output = opt.output
  86   remove = opt.remove
  87   if not output:
  88     parser.error('You must specify an output file')
  89
  90   if not args:
  91     parser.error('You must specify at least one object or library')
  92
  93   output = output.strip()
  94   remove = remove.strip()
  95
  96   if remove:
  97     try:
  98       remove_re = re.compile(opt.remove)
  99     except:
 100       parser.error('%s is not a valid regular expression' % opt.remove)
 101   else:
 102     remove_re = None
 103
 104   if sys.platform != 'win32' and sys.platform != 'cygwin':
 105     parser.error('this script only works on Windows for now')
 106
 107   # If this is set, we can't capture lib.exe's output.
 108   if 'VS_UNICODE_OUTPUT' in os.environ:
 109     del os.environ['VS_UNICODE_OUTPUT']
 110
 111   CombineLibraries(output, remove_re, args)
 112   return 0
 113
 114
 115 if __name__ == '__main__':
 116   sys.exit(Main())