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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(__file__)
40v8_root = os.path.normpath(os.path.join(script_dir, os.pardir))
41
42if __name__ == '__main__':
43  os.chdir(v8_root)
44  script_dir = os.path.dirname(__file__)
45  v8_root = '.'
46
47sys.path.insert(0, os.path.join(v8_root, 'build', 'gyp', 'pylib'))
48import gyp
49
50# Add paths so that pymod_do_main(...) can import files.
51sys.path.insert(
52    1, os.path.abspath(os.path.join(v8_root, 'tools', 'generate_shim_headers')))
53
54
55def apply_gyp_environment(file_path=None):
56  """
57  Reads in a *.gyp_env file and applies the valid keys to os.environ.
58  """
59  if not file_path or not os.path.exists(file_path):
60    return
61  file_contents = open(file_path).read()
62  try:
63    file_data = eval(file_contents, {'__builtins__': None}, None)
64  except SyntaxError, e:
65    e.filename = os.path.abspath(file_path)
66    raise
67  supported_vars = ( 'V8_GYP_FILE',
68                     'V8_GYP_SYNTAX_CHECK',
69                     'GYP_DEFINES',
70                     'GYP_GENERATOR_FLAGS',
71                     'GYP_GENERATOR_OUTPUT', )
72  for var in supported_vars:
73    val = file_data.get(var)
74    if val:
75      if var in os.environ:
76        print 'INFO: Environment value for "%s" overrides value in %s.' % (
77            var, os.path.abspath(file_path)
78        )
79      else:
80        os.environ[var] = val
81
82
83def additional_include_files(args=[]):
84  """
85  Returns a list of additional (.gypi) files to include, without
86  duplicating ones that are already specified on the command line.
87  """
88  # Determine the include files specified on the command line.
89  # This doesn't cover all the different option formats you can use,
90  # but it's mainly intended to avoid duplicating flags on the automatic
91  # makefile regeneration which only uses this format.
92  specified_includes = set()
93  for arg in args:
94    if arg.startswith('-I') and len(arg) > 2:
95      specified_includes.add(os.path.realpath(arg[2:]))
96
97  result = []
98  def AddInclude(path):
99    if os.path.realpath(path) not in specified_includes:
100      result.append(path)
101
102  # Always include standalone.gypi
103  AddInclude(os.path.join(v8_root, 'build', 'standalone.gypi'))
104
105  # Optionally add supplemental .gypi files if present.
106  supplements = glob.glob(os.path.join(v8_root, '*', 'supplement.gypi'))
107  for supplement in supplements:
108    AddInclude(supplement)
109
110  return result
111
112
113def run_gyp(args):
114  rc = gyp.main(args)
115  if rc != 0:
116    print 'Error running GYP'
117    sys.exit(rc)
118
119
120if __name__ == '__main__':
121  args = sys.argv[1:]
122
123  if 'SKIP_V8_GYP_ENV' not in os.environ:
124    # Update the environment based on v8.gyp_env
125    gyp_env_path = os.path.join(os.path.dirname(v8_root), 'v8.gyp_env')
126    apply_gyp_environment(gyp_env_path)
127
128  # This could give false positives since it doesn't actually do real option
129  # parsing.  Oh well.
130  gyp_file_specified = False
131  for arg in args:
132    if arg.endswith('.gyp'):
133      gyp_file_specified = True
134      break
135
136  # If we didn't get a file, check an env var, and then fall back to
137  # assuming 'all.gyp' from the same directory as the script.
138  if not gyp_file_specified:
139    gyp_file = os.environ.get('V8_GYP_FILE')
140    if gyp_file:
141      # Note that V8_GYP_FILE values can't have backslashes as
142      # path separators even on Windows due to the use of shlex.split().
143      args.extend(shlex.split(gyp_file))
144    else:
145      # Note that this must not start with "./" or things break.
146      # So we rely on having done os.chdir(v8_root) above and use the
147      # relative path.
148      args.append(os.path.join('build', 'all.gyp'))
149
150  args.extend(['-I' + i for i in additional_include_files(args)])
151
152  # There shouldn't be a circular dependency relationship between .gyp files
153  args.append('--no-circular-check')
154
155  # Set the GYP DEPTH variable to the root of the V8 project.
156  args.append('--depth=' + v8_root)
157
158  # If V8_GYP_SYNTAX_CHECK is set to 1, it will invoke gyp with --check
159  # to enfore syntax checking.
160  syntax_check = os.environ.get('V8_GYP_SYNTAX_CHECK')
161  if syntax_check and int(syntax_check):
162    args.append('--check')
163
164  print 'Updating projects from gyp files...'
165  sys.stdout.flush()
166
167  # Generate for the architectures supported on the given platform.
168  gyp_args = list(args)
169  if platform.system() == 'Linux':
170    gyp_args.append('--generator-output=out')
171  run_gyp(gyp_args)
172