v8/build/gyp_environment.py
machenbach 89731cfbf8 Port chromium landmines script.
This runs the landmines script as a gclient hook. It can
as such be used to clobber local checkouts when hooks are
run locally.

It is a softer version than chromium's landmines script, as
it only deletes directories in the output directory due
to compatibility with MSVS which has "build" hardcoded as
output directory in several places.

BUG=chromium:403263
LOG=n

Review URL: https://codereview.chromium.org/955463002

Cr-Commit-Position: refs/heads/master@{#26831}
2015-02-24 16:57:47 +00:00

53 lines
1.6 KiB
Python

# 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_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)