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# Copyright 1999-2010 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
from _emerge.AsynchronousLock import AsynchronousLock
from _emerge.SlotObject import SlotObject
import portage
from portage import os
import errno
class EbuildBuildDir(SlotObject):
__slots__ = ("dir_path", "scheduler", "settings",
"locked", "_catdir", "_lock_obj")
def __init__(self, **kwargs):
SlotObject.__init__(self, **kwargs)
self.locked = False
def lock(self):
"""
This raises an AlreadyLocked exception if lock() is called
while a lock is already held. In order to avoid this, call
unlock() or check whether the "locked" attribute is True
or False before calling lock().
"""
if self._lock_obj is not None:
raise self.AlreadyLocked((self._lock_obj,))
dir_path = self.dir_path
catdir = os.path.dirname(dir_path)
self._catdir = catdir
portage.util.ensure_dirs(os.path.dirname(catdir),
gid=portage.portage_gid,
mode=0o70, mask=0)
catdir_lock = AsynchronousLock(path=catdir, scheduler=self.scheduler)
catdir_lock.start()
catdir_lock.wait()
try:
portage.util.ensure_dirs(catdir,
gid=portage.portage_gid,
mode=0o70, mask=0)
builddir_lock = AsynchronousLock(path=dir_path,
scheduler=self.scheduler)
builddir_lock.start()
builddir_lock.wait()
self._lock_obj = builddir_lock.lock_obj
self.settings['PORTAGE_BUILDIR_LOCKED'] = '1'
finally:
self.locked = self._lock_obj is not None
catdir_lock.unlock()
def clean_log(self):
"""Discard existing log. The log will not be be discarded
in cases when it would not make sense, like when FEATURES=keepwork
is enabled."""
settings = self.settings
if 'keepwork' in settings.features:
return
log_file = settings.get('PORTAGE_LOG_FILE')
if log_file is not None and os.path.isfile(log_file):
try:
os.unlink(log_file)
except OSError:
pass
def unlock(self):
if self._lock_obj is None:
return
portage.locks.unlockdir(self._lock_obj)
self._lock_obj = None
self.locked = False
self.settings.pop('PORTAGE_BUILDIR_LOCKED', None)
catdir = self._catdir
catdir_lock = None
try:
catdir_lock = portage.locks.lockdir(catdir)
finally:
if catdir_lock:
try:
os.rmdir(catdir)
except OSError as e:
if e.errno not in (errno.ENOENT,
errno.ENOTEMPTY, errno.EEXIST):
raise
del e
portage.locks.unlockdir(catdir_lock)
class AlreadyLocked(portage.exception.PortageException):
pass
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