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# Copyright 2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
import errno
from portage import os
from portage import _unicode_encode, _encodings
from portage.util import shlex_split, varexpand, writemsg
from _emerge.CompositeTask import CompositeTask
from _emerge.SpawnProcess import SpawnProcess
from .ManifestProcess import ManifestProcess
class ManifestTask(CompositeTask):
__slots__ = ("cp", "distdir", "fetchlist_dict", "gpg_cmd",
"gpg_vars", "repo_config", "_manifest_path")
_PGP_HEADER = b"BEGIN PGP SIGNED MESSAGE"
def _start(self):
self._manifest_path = os.path.join(self.repo_config.location,
self.cp, "Manifest")
manifest_proc = ManifestProcess(cp=self.cp, distdir=self.distdir,
fetchlist_dict=self.fetchlist_dict, repo_config=self.repo_config,
scheduler=self.scheduler)
self._start_task(manifest_proc, self._manifest_proc_exit)
def _manifest_proc_exit(self, manifest_proc):
self._assert_current(manifest_proc)
if manifest_proc.returncode not in (os.EX_OK, manifest_proc.MODIFIED):
self.returncode = manifest_proc.returncode
self._current_task = None
self.wait()
return
modified = manifest_proc.returncode == manifest_proc.MODIFIED
sign = self.gpg_cmd is not None
if not modified and sign:
sign = self._need_signature()
if not sign or not os.path.exists(self._manifest_path):
self.returncode = os.EX_OK
self._current_task = None
self.wait()
return
self._start_gpg_proc()
def _start_gpg_proc(self):
gpg_vars = self.gpg_vars
if gpg_vars is None:
gpg_vars = {}
else:
gpg_vars = gpg_vars.copy()
gpg_vars["FILE"] = self._manifest_path
gpg_cmd = varexpand(self.gpg_cmd, mydict=gpg_vars)
gpg_cmd = shlex_split(gpg_cmd)
gpg_proc = SpawnProcess(
args=gpg_cmd, env=os.environ, scheduler=self.scheduler)
self._start_task(gpg_proc, self._gpg_proc_exit)
def _gpg_proc_exit(self, gpg_proc):
if self._default_exit(gpg_proc) != os.EX_OK:
self.wait()
return
rename_args = (self._manifest_path + ".asc", self._manifest_path)
try:
os.rename(*rename_args)
except OSError as e:
writemsg("!!! rename('%s', '%s'): %s\n" % rename_args + (e,),
noiselevel=-1)
try:
os.unlink(self._manifest_path + ".asc")
except OSError:
pass
self.returncode = 1
else:
self.returncode = os.EX_OK
self._current_task = None
self.wait()
def _need_signature(self):
try:
with open(_unicode_encode(self._manifest_path,
encoding=_encodings['fs'], errors='strict'), 'rb') as f:
return self._PGP_HEADER not in f.readline()
except IOError as e:
if e.errno in (errno.ENOENT, errno.ESTALE):
return False
raise
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