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# Copyright 2015 the V8 project authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""
Sets up various automatic gyp environment variables. These are used by
gyp_v8 and landmines.py which run at different stages of runhooks. To
make sure settings are consistent between them, all setup should happen here.
"""
import os
import sys
SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__))
V8_ROOT = os.path.abspath(os.path.join(SCRIPT_DIR, os.pardir))
def apply_gyp_environment(file_path=None):
"""
Reads in a *.gyp_env file and applies the valid keys to os.environ.
"""
if not file_path or not os.path.exists(file_path):
return
file_contents = open(file_path).read()
try:
file_data = eval(file_contents, {'__builtins__': None}, None)
except SyntaxError, e:
e.filename = os.path.abspath(file_path)
raise
supported_vars = ( 'V8_GYP_FILE',
'V8_GYP_SYNTAX_CHECK',
'GYP_DEFINES',
'GYP_GENERATORS',
'GYP_GENERATOR_FLAGS',
'GYP_GENERATOR_OUTPUT', )
for var in supported_vars:
val = file_data.get(var)
if val:
if var in os.environ:
print 'INFO: Environment value for "%s" overrides value in %s.' % (
var, os.path.abspath(file_path)
)
else:
os.environ[var] = val
def set_environment():
"""Sets defaults for GYP_* variables."""
if 'SKIP_V8_GYP_ENV' not in os.environ:
# Update the environment based on v8.gyp_env
gyp_env_path = os.path.join(os.path.dirname(V8_ROOT), 'v8.gyp_env')
apply_gyp_environment(gyp_env_path)
if not os.environ.get('GYP_GENERATORS'):
# Default to ninja on all platforms.
os.environ['GYP_GENERATORS'] = 'ninja'