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, 'remoting', 'tools', 'build'))
  29 sys.path.insert(1, os.path.join(chrome_src, 'third_party', 'WebKit',
  30     'Source', 'core', 'scripts'))
  31 # TODO(adamk): Remove this line once core.gyp is no longer a directory
  32 sys.path.insert(1, os.path.join(chrome_src, 'third_party', 'WebKit',
  33     'Source', 'core', 'core.gyp', 'scripts'))
  34
  35
  36 # On Windows, Psyco shortens warm runs of build/gyp_chromium by about
  37 # 20 seconds on a z600 machine with 12 GB of RAM, from 90 down to 70
  38 # seconds.  Conversely, memory usage of build/gyp_chromium with Psyco
  39 # maxes out at about 158 MB vs. 132 MB without it.
  40 #
  41 # Psyco uses native libraries, so we need to load a different
  42 # installation depending on which OS we are running under. It has not
  43 # been tested whether using Psyco on our Mac and Linux builds is worth
  44 # it (the GYP running time is a lot shorter, so the JIT startup cost
  45 # may not be worth it).
  46 if sys.platform == 'win32':
  47   try:
  48     sys.path.insert(0, os.path.join(chrome_src, 'third_party', 'psyco_win32'))
  49     import psyco
  50   except:
  51     psyco = None
  52 else:
  53   psyco = None
  54
  55 def additional_include_files(args=[]):
  56   """
  57   Returns a list of additional (.gypi) files to include, without
  58   duplicating ones that are already specified on the command line.
  59   """
  60   # Determine the include files specified on the command line.
  61   # This doesn't cover all the different option formats you can use,
  62   # but it's mainly intended to avoid duplicating flags on the automatic
  63   # makefile regeneration which only uses this format.
  64   specified_includes = set()
  65   for arg in args:
  66     if arg.startswith('-I') and len(arg) > 2:
  67       specified_includes.add(os.path.realpath(arg[2:]))
  68
  69   result = []
  70   def AddInclude(path):
  71     if os.path.realpath(path) not in specified_includes:
  72       result.append(path)
  73
  74   # Always include common.gypi.
  75   AddInclude(os.path.join(script_dir, 'common.gypi'))
  76
  77   # Optionally add supplemental .gypi files if present.
  78   supplements = glob.glob(os.path.join(chrome_src, '*', 'supplement.gypi'))
  79   for supplement in supplements:
  80     AddInclude(supplement)
  81
  82   return result
  83
  84 if __name__ == '__main__':
  85   args = sys.argv[1:]
  86
  87   # Use the Psyco JIT if available.
  88   if psyco:
  89     psyco.profile()
  90     print "Enabled Psyco JIT."
  91
  92   # Fall back on hermetic python if we happen to get run under cygwin.
  93   # TODO(bradnelson): take this out once this issue is fixed:
  94   #    http://code.google.com/p/gyp/issues/detail?id=177
  95   if sys.platform == 'cygwin':
  96     python_dir = os.path.join(chrome_src, 'third_party', 'python_26')
  97     env = os.environ.copy()
  98     env['PATH'] = python_dir + os.pathsep + env.get('PATH', '')
  99     p = subprocess.Popen(
 100        [os.path.join(python_dir, 'python.exe')] + sys.argv,
 101        env=env, shell=False)
 102     p.communicate()
 103     sys.exit(p.returncode)
 104
 105   gyp_helper.apply_chromium_gyp_env()
 106
 107   # This could give false positives since it doesn't actually do real option
 108   # parsing.  Oh well.
 109   gyp_file_specified = False
 110   for arg in args:
 111     if arg.endswith('.gyp'):
 112       gyp_file_specified = True
 113       break
 114
 115   # If we didn't get a file, check an env var, and then fall back to
 116   # assuming 'all.gyp' from the same directory as the script.
 117   if not gyp_file_specified:
 118     gyp_file = os.environ.get('CHROMIUM_GYP_FILE')
 119     if gyp_file:
 120       # Note that CHROMIUM_GYP_FILE values can't have backslashes as
 121       # path separators even on Windows due to the use of shlex.split().
 122       args.extend(shlex.split(gyp_file))
 123     else:
 124       args.append(os.path.join(script_dir, 'all.gyp'))
 125
 126   args.extend(['-I' + i for i in additional_include_files(args)])
 127
 128   # There shouldn't be a circular dependency relationship between .gyp files,
 129   # but in Chromium's .gyp files, on non-Mac platforms, circular relationships
 130   # currently exist.  The check for circular dependencies is currently
 131   # bypassed on other platforms, but is left enabled on the Mac, where a
 132   # violation of the rule causes Xcode to misbehave badly.
 133   # TODO(mark): Find and kill remaining circular dependencies, and remove this
 134   # option.  http://crbug.com/35878.
 135   # TODO(tc): Fix circular dependencies in ChromiumOS then add linux2 to the
 136   # list.
 137   if sys.platform not in ('darwin',):
 138     args.append('--no-circular-check')
 139
 140   # Default to ninja on linux, but only if no generator has explicitly been set.
 141   # . -f / --format has precedence over the env var, no need to check for it
 142   # . set the env var only if it hasn't been set yet
 143   # . chromium.gyp_env has been applied to os.environ at this point already
 144   if sys.platform.startswith('linux') and not os.environ.get('GYP_GENERATORS'):
 145     os.environ['GYP_GENERATORS'] = 'ninja'
 146
 147   # If CHROMIUM_GYP_SYNTAX_CHECK is set to 1, it will invoke gyp with --check
 148   # to enfore syntax checking.
 149   syntax_check = os.environ.get('CHROMIUM_GYP_SYNTAX_CHECK')
 150   if syntax_check and int(syntax_check):
 151     args.append('--check')
 152
 153   print 'Updating projects from gyp files...'
 154   sys.stdout.flush()
 155
 156   # Off we go...
 157   sys.exit(gyp.main(args))