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# Copyright (C) 2012 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 os
import morphlib
class BuildEnvironment():
def __init__(self, settings, arch=None):
self.arch = morphlib.util.arch() if arch is None else arch
self.env = self._clean_env(settings)
_osenv = os.environ
_default_path = '/sbin:/usr/sbin:/bin:/usr/bin'
_override_term = 'dumb'
_override_shell = '/bin/sh'
_override_username = 'tomjon'
_override_locale = 'C'
_override_home = '/tmp'
_ccache_path = '/usr/lib/ccache'
def _clean_env(self, settings):
'''Create a fresh set of environment variables for a clean build.
Return a dict with the new environment.
'''
path = self._osenv['PATH']
# copy a set of white-listed variables from the original env
copied_vars = dict.fromkeys([
'BOOTSTRAP_TOOLS',
'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]
if settings['bootstrap'] or not settings['staging-chroot']:
if 'TMPDIR' in self._osenv:
env['TMPDIR'] = self._osenv['TMPDIR']
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
if settings['keep-path'] or settings['bootstrap']:
env['PATH'] = path
else:
env['PATH'] = self._default_path
env['TOOLCHAIN_TARGET'] = settings['toolchain-target']
env['CFLAGS'] = settings['target-cflags']
env['PREFIX'] = settings['prefix']
env['BOOTSTRAP'] = 'true' if settings['bootstrap'] else 'false'
if not settings['no-ccache']:
env['PATH'] = ('%s:%s' % (self._ccache_path, env['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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