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# Copyright 2014 The Chromium 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_chromium and landmines.py which run at different stages of runhooks. To
make sure settings are consistent between them, all setup should happen here.
"""
import gyp_helper
import os
import sys
import vs_toolchain
def SetEnvironment():
"""Sets defaults for GYP_* variables."""
gyp_helper.apply_chromium_gyp_env()
# Default to ninja on linux and windows, but only if no generator has
# explicitly been set.
# Also default to ninja on mac, but only when not building chrome/ios.
# . -f / --format has precedence over the env var, no need to check for it
# . set the env var only if it hasn't been set yet
# . chromium.gyp_env has been applied to os.environ at this point already
if sys.platform.startswith(('linux', 'win', 'freebsd')) and \
not os.environ.get('GYP_GENERATORS'):
os.environ['GYP_GENERATORS'] = 'ninja'
elif sys.platform == 'darwin' and not os.environ.get('GYP_GENERATORS') and \
not 'OS=ios' in os.environ.get('GYP_DEFINES', []):
os.environ['GYP_GENERATORS'] = 'ninja'
vs_toolchain.SetEnvironmentAndGetRuntimeDllDirs()
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