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# Copyright 1999-2011 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
import errno
from _emerge.CompositeTask import CompositeTask
from _emerge.SpawnProcess import SpawnProcess
from portage import os, _shell_quote, _unicode_encode
from portage.const import BASH_BINARY
class BinpkgEnvExtractor(CompositeTask):
"""
Extract environment.bz2 for a binary or installed package.
"""
__slots__ = ('settings',)
def saved_env_exists(self):
return os.path.exists(self._get_saved_env_path())
def dest_env_exists(self):
return os.path.exists(self._get_dest_env_path())
def _get_saved_env_path(self):
return os.path.join(os.path.dirname(self.settings['EBUILD']),
"environment.bz2")
def _get_dest_env_path(self):
return os.path.join(self.settings["T"], "environment")
def _start(self):
saved_env_path = self._get_saved_env_path()
dest_env_path = self._get_dest_env_path()
shell_cmd = "${PORTAGE_BUNZIP2_COMMAND:-${PORTAGE_BZIP2_COMMAND} -d} -c -- %s > %s" % \
(_shell_quote(saved_env_path),
_shell_quote(dest_env_path))
extractor_proc = SpawnProcess(
args=[BASH_BINARY, "-c", shell_cmd],
background=self.background,
env=self.settings.environ(),
scheduler=self.scheduler,
logfile=self.settings.get('PORTAGE_LOG_FILE'))
self._start_task(extractor_proc, self._extractor_exit)
def _remove_dest_env(self):
try:
os.unlink(self._get_dest_env_path())
except OSError as e:
if e.errno != errno.ENOENT:
raise
def _extractor_exit(self, extractor_proc):
if self._default_exit(extractor_proc) != os.EX_OK:
self._remove_dest_env()
self.wait()
return
# This is a signal to ebuild.sh, so that it knows to filter
# out things like SANDBOX_{DENY,PREDICT,READ,WRITE} that
# would be preserved between normal phases.
open(_unicode_encode(self._get_dest_env_path() + '.raw'), 'wb').close()
self._current_task = None
self.returncode = os.EX_OK
self.wait()
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