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1#!/usr/bin/env python
2#
3# Copyright 2012 the V8 project authors. All rights reserved.
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met:
7#
8#     * Redistributions of source code must retain the above copyright
9#       notice, this list of conditions and the following disclaimer.
10#     * Redistributions in binary form must reproduce the above
11#       copyright notice, this list of conditions and the following
12#       disclaimer in the documentation and/or other materials provided
13#       with the distribution.
14#     * Neither the name of Google Inc. nor the names of its
15#       contributors may be used to endorse or promote products derived
16#       from this software without specific prior written permission.
17#
18# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29
30# This script is wrapper for V8 that adds some support for how GYP
31# is invoked by V8 beyond what can be done in the gclient hooks.
32
33import glob
34import os
35import platform
36import shlex
37import sys
38
39script_dir = os.path.dirname(os.path.realpath(__file__))
40v8_root = os.path.abspath(os.path.join(script_dir, os.pardir))
41
42sys.path.insert(0, os.path.join(v8_root, 'build', 'gyp', 'pylib'))
43import gyp
44
45# Add paths so that pymod_do_main(...) can import files.
46sys.path.insert(
47    1, os.path.abspath(os.path.join(v8_root, 'tools', 'generate_shim_headers')))
48
49
50def apply_gyp_environment(file_path=None):
51  """
52  Reads in a *.gyp_env file and applies the valid keys to os.environ.
53  """
54  if not file_path or not os.path.exists(file_path):
55    return
56  file_contents = open(file_path).read()
57  try:
58    file_data = eval(file_contents, {'__builtins__': None}, None)
59  except SyntaxError, e:
60    e.filename = os.path.abspath(file_path)
61    raise
62  supported_vars = ( 'V8_GYP_FILE',
63                     'V8_GYP_SYNTAX_CHECK',
64                     'GYP_DEFINES',
65                     'GYP_GENERATOR_FLAGS',
66                     'GYP_GENERATOR_OUTPUT', )
67  for var in supported_vars:
68    val = file_data.get(var)
69    if val:
70      if var in os.environ:
71        print 'INFO: Environment value for "%s" overrides value in %s.' % (
72            var, os.path.abspath(file_path)
73        )
74      else:
75        os.environ[var] = val
76
77
78def additional_include_files(args=[]):
79  """
80  Returns a list of additional (.gypi) files to include, without
81  duplicating ones that are already specified on the command line.
82  """
83  # Determine the include files specified on the command line.
84  # This doesn't cover all the different option formats you can use,
85  # but it's mainly intended to avoid duplicating flags on the automatic
86  # makefile regeneration which only uses this format.
87  specified_includes = set()
88  for arg in args:
89    if arg.startswith('-I') and len(arg) > 2:
90      specified_includes.add(os.path.realpath(arg[2:]))
91
92  result = []
93  def AddInclude(path):
94    if os.path.realpath(path) not in specified_includes:
95      result.append(path)
96
97  # Always include standalone.gypi
98  AddInclude(os.path.join(v8_root, 'build', 'standalone.gypi'))
99
100  # Optionally add supplemental .gypi files if present.
101  supplements = glob.glob(os.path.join(v8_root, '*', 'supplement.gypi'))
102  for supplement in supplements:
103    AddInclude(supplement)
104
105  return result
106
107
108def run_gyp(args):
109  rc = gyp.main(args)
110  if rc != 0:
111    print 'Error running GYP'
112    sys.exit(rc)
113
114
115if __name__ == '__main__':
116  args = sys.argv[1:]
117
118  if 'SKIP_V8_GYP_ENV' not in os.environ:
119    # Update the environment based on v8.gyp_env
120    gyp_env_path = os.path.join(os.path.dirname(v8_root), 'v8.gyp_env')
121    apply_gyp_environment(gyp_env_path)
122
123  # This could give false positives since it doesn't actually do real option
124  # parsing.  Oh well.
125  gyp_file_specified = False
126  for arg in args:
127    if arg.endswith('.gyp'):
128      gyp_file_specified = True
129      break
130
131  # If we didn't get a file, check an env var, and then fall back to
132  # assuming 'all.gyp' from the same directory as the script.
133  if not gyp_file_specified:
134    gyp_file = os.environ.get('V8_GYP_FILE')
135    if gyp_file:
136      # Note that V8_GYP_FILE values can't have backslashes as
137      # path separators even on Windows due to the use of shlex.split().
138      args.extend(shlex.split(gyp_file))
139    else:
140      args.append(os.path.join(script_dir, 'all.gyp'))
141
142  args.extend(['-I' + i for i in additional_include_files(args)])
143
144  # There shouldn't be a circular dependency relationship between .gyp files
145  args.append('--no-circular-check')
146
147  # Set the GYP DEPTH variable to the root of the V8 project.
148  args.append('--depth=' + os.path.relpath(v8_root))
149
150  # If V8_GYP_SYNTAX_CHECK is set to 1, it will invoke gyp with --check
151  # to enfore syntax checking.
152  syntax_check = os.environ.get('V8_GYP_SYNTAX_CHECK')
153  if syntax_check and int(syntax_check):
154    args.append('--check')
155
156  print 'Updating projects from gyp files...'
157  sys.stdout.flush()
158
159  # Generate for the architectures supported on the given platform.
160  gyp_args = list(args)
161  gyp_generators = os.environ.get('GYP_GENERATORS')
162  if platform.system() == 'Linux' and gyp_generators != 'ninja':
163    # Work around for crbug.com/331475.
164    for f in glob.glob(os.path.join(v8_root, 'out', 'Makefile.*')):
165      os.unlink(f)
166    # --generator-output defines where the Makefile goes.
167    gyp_args.append('--generator-output=out')
168    # -Goutput_dir defines where the build output goes, relative to the
169    # Makefile. Set it to . so that the build output doesn't end up in out/out.
170    gyp_args.append('-Goutput_dir=.')
171  run_gyp(gyp_args)
172