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# Copyright (C) 2012-2013 Codethink Limited
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import copy
import cliapp
import os
import morphlib
class BuildEnvironment():
'''Represents the build environment for an artifact
This should be as consistent as possible across builds, but some
artifacts will require tweaks. The intention of this object is
to create one once and call populate() to create an initial state
and when changes are required, call clone() to get another instance
which can be modified.
'''
def __init__(self, settings, target, arch=None):
'''Create a new BuildEnvironment object'''
self.extra_path = []
self.target = target
self.arch = morphlib.util.arch() if arch is None else arch
self.env = self._clean_env(settings)
_osenv = os.environ
_ccache_path = '/usr/lib/ccache'
_override_home = '/tmp'
_override_locale = 'C'
_override_shell = '/bin/sh'
_override_term = 'dumb'
_override_username = 'tomjon'
def get_bootstrap_target(self, target):
'''Set 'vendor' field of the given machine triplet as 'bootstrap' '''
parts = target.split('-')
if len(parts) < 2:
raise morphlib.Error('Failed to parse machine triplet returned by '
'host compiler: %s' % target)
return '-'.join([parts[0], 'bootstrap'] + parts[2:])
def _clean_env(self, settings):
'''Create a fresh set of environment variables for a clean build.
Return a dict with the new environment.
'''
# copy a set of white-listed variables from the original env
copied_vars = dict.fromkeys([
'DISTCC_HOSTS',
'LD_PRELOAD',
'LD_LIBRARY_PATH',
'FAKEROOTKEY',
'FAKED_MODE',
'FAKEROOT_FD_BASE',
])
for name in copied_vars:
copied_vars[name] = self._osenv.get(name, None)
env = {}
# apply the copied variables to the clean env
for name in copied_vars:
if copied_vars[name] is not None:
env[name] = copied_vars[name]
env['TERM'] = self._override_term
env['SHELL'] = self._override_shell
env['USER'] = \
env['USERNAME'] = \
env['LOGNAME'] = self._override_username
env['LC_ALL'] = self._override_locale
env['HOME'] = self._override_home
env['BUILD'] = self.target
env['TARGET'] = self.target
env['TARGET_STAGE1'] = self.get_bootstrap_target(self.target)
env['TARGET_GCC_CONFIG'] = ''
if not settings['no-ccache']:
self.extra_path.append(self._ccache_path)
# FIXME: we should set CCACHE_BASEDIR so any objects that refer to their
# current directory get corrected. This improve the cache hit rate
# env['CCACHE_BASEDIR'] = self.tempdir.dirname
env['CCACHE_DIR'] = '/tmp/ccache'
env['CCACHE_EXTRAFILES'] = ':'.join(
f for f in ('/baserock/binutils.meta',
'/baserock/eglibc.meta',
'/baserock/gcc.meta') if os.path.exists(f)
)
if not settings['no-distcc']:
env['CCACHE_PREFIX'] = 'distcc'
return env
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