build/gyp_chromium

   1 #!/usr/bin/env python
   2
   3 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
   4 # Use of this source code is governed by a BSD-style license that can be
   5 # found in the LICENSE file.
   6
   7 # This script is wrapper for Chromium that adds some support for how GYP
   8 # is invoked by Chromium beyond what can be done in the gclient hooks.
   9
  10 import glob
  11 import gyp_helper
  12 import os
  13 import shlex
  14 import subprocess
  15 import sys
  16
  17 script_dir = os.path.dirname(os.path.realpath(__file__))
  18 chrome_src = os.path.abspath(os.path.join(script_dir, os.pardir))
  19
  20 sys.path.insert(0, os.path.join(chrome_src, 'tools', 'gyp', 'pylib'))
  21 import gyp
  22
  23 # Add paths so that pymod_do_main(...) can import files.
  24 sys.path.insert(1, os.path.join(chrome_src, 'tools', 'generate_shim_headers'))
  25 sys.path.insert(1, os.path.join(chrome_src, 'tools', 'grit'))
  26 sys.path.insert(1, os.path.join(chrome_src, 'chrome', 'tools', 'build'))
  27 sys.path.insert(1, os.path.join(chrome_src, 'native_client', 'build'))
  28 sys.path.insert(1, os.path.join(chrome_src, 'third_party', 'WebKit',
  29     'Source', 'WebCore', 'WebCore.gyp', 'scripts'))
  30
  31
  32 # On Windows, Psyco shortens warm runs of build/gyp_chromium by about
  33 # 20 seconds on a z600 machine with 12 GB of RAM, from 90 down to 70
  34 # seconds.  Conversely, memory usage of build/gyp_chromium with Psyco
  35 # maxes out at about 158 MB vs. 132 MB without it.
  36 #
  37 # Psyco uses native libraries, so we need to load a different
  38 # installation depending on which OS we are running under. It has not
  39 # been tested whether using Psyco on our Mac and Linux builds is worth
  40 # it (the GYP running time is a lot shorter, so the JIT startup cost
  41 # may not be worth it).
  42 if sys.platform == 'win32':
  43   try:
  44     sys.path.insert(0, os.path.join(chrome_src, 'third_party', 'psyco_win32'))
  45     import psyco
  46   except:
  47     psyco = None
  48 else:
  49   psyco = None
  50
  51 def additional_include_files(args=[]):
  52   """
  53   Returns a list of additional (.gypi) files to include, without
  54   duplicating ones that are already specified on the command line.
  55   """
  56   # Determine the include files specified on the command line.
  57   # This doesn't cover all the different option formats you can use,
  58   # but it's mainly intended to avoid duplicating flags on the automatic
  59   # makefile regeneration which only uses this format.
  60   specified_includes = set()
  61   for arg in args:
  62     if arg.startswith('-I') and len(arg) > 2:
  63       specified_includes.add(os.path.realpath(arg[2:]))
  64
  65   result = []
  66   def AddInclude(path):
  67     if os.path.realpath(path) not in specified_includes:
  68       result.append(path)
  69
  70   # Always include common.gypi.
  71   AddInclude(os.path.join(script_dir, 'common.gypi'))
  72
  73   # Optionally add supplemental .gypi files if present.
  74   supplements = glob.glob(os.path.join(chrome_src, '*', 'supplement.gypi'))
  75   for supplement in supplements:
  76     AddInclude(supplement)
  77
  78   return result
  79
  80 if __name__ == '__main__':
  81   args = sys.argv[1:]
  82
  83   # Use the Psyco JIT if available.
  84   if psyco:
  85     psyco.profile()
  86     print "Enabled Psyco JIT."
  87
  88   # Fall back on hermetic python if we happen to get run under cygwin.
  89   # TODO(bradnelson): take this out once this issue is fixed:
  90   #    http://code.google.com/p/gyp/issues/detail?id=177
  91   if sys.platform == 'cygwin':
  92     python_dir = os.path.join(chrome_src, 'third_party', 'python_26')
  93     env = os.environ.copy()
  94     env['PATH'] = python_dir + os.pathsep + env.get('PATH', '')
  95     p = subprocess.Popen(
  96        [os.path.join(python_dir, 'python.exe')] + sys.argv,
  97        env=env, shell=False)
  98     p.communicate()
  99     sys.exit(p.returncode)
 100
 101   gyp_helper.apply_chromium_gyp_env()
 102
 103   # This could give false positives since it doesn't actually do real option
 104   # parsing.  Oh well.
 105   gyp_file_specified = False
 106   for arg in args:
 107     if arg.endswith('.gyp'):
 108       gyp_file_specified = True
 109       break
 110
 111   # If we didn't get a file, check an env var, and then fall back to
 112   # assuming 'all.gyp' from the same directory as the script.
 113   if not gyp_file_specified:
 114     gyp_file = os.environ.get('CHROMIUM_GYP_FILE')
 115     if gyp_file:
 116       # Note that CHROMIUM_GYP_FILE values can't have backslashes as
 117       # path separators even on Windows due to the use of shlex.split().
 118       args.extend(shlex.split(gyp_file))
 119     else:
 120       args.append(os.path.join(script_dir, 'all.gyp'))
 121
 122   args.extend(['-I' + i for i in additional_include_files(args)])
 123
 124   # There shouldn't be a circular dependency relationship between .gyp files,
 125   # but in Chromium's .gyp files, on non-Mac platforms, circular relationships
 126   # currently exist.  The check for circular dependencies is currently
 127   # bypassed on other platforms, but is left enabled on the Mac, where a
 128   # violation of the rule causes Xcode to misbehave badly.
 129   # TODO(mark): Find and kill remaining circular dependencies, and remove this
 130   # option.  http://crbug.com/35878.
 131   # TODO(tc): Fix circular dependencies in ChromiumOS then add linux2 to the
 132   # list.
 133   if sys.platform not in ('darwin',):
 134     args.append('--no-circular-check')
 135
 136   # If CHROMIUM_GYP_SYNTAX_CHECK is set to 1, it will invoke gyp with --check
 137   # to enfore syntax checking.
 138   syntax_check = os.environ.get('CHROMIUM_GYP_SYNTAX_CHECK')
 139   if syntax_check and int(syntax_check):
 140     args.append('--check')
 141
 142   print 'Updating projects from gyp files...'
 143   sys.stdout.flush()
 144
 145   # Off we go...
 146   sys.exit(gyp.main(args))