Bug #275047 - Split _emerge/__init__.py into smaller pieces (part 4).

Thanks to Sebastian Mingramm (few) <s.mingramm@gmx.de> for this patch.

svn path=/main/trunk/; revision=13669

1 files changed, 170 insertions, 0 deletions

diff --git a/pym/_emerge/MetadataRegen.py b/pym/_emerge/MetadataRegen.py
new file mode 100644
index 000000000..7b06650d0
--- /dev/null
+++ b/pym/_emerge/MetadataRegen.py
@@ -0,0 +1,170 @@
+import os
+
+try:
+	import portage
+except ImportError:
+	from os import path as osp
+	import sys
+	sys.path.insert(0, osp.join(osp.dirname(osp.dirname(osp.realpath(__file__))), "pym"))
+	import portage
+
+from _emerge.EbuildMetadataPhase import EbuildMetadataPhase
+from _emerge.PollScheduler import PollScheduler
+
+class MetadataRegen(PollScheduler):
+
+	def __init__(self, portdb, cp_iter=None, consumer=None,
+		max_jobs=None, max_load=None):
+		PollScheduler.__init__(self)
+		self._portdb = portdb
+		self._global_cleanse = False
+		if cp_iter is None:
+			cp_iter = self._iter_every_cp()
+			# We can globally cleanse stale cache only if we
+			# iterate over every single cp.
+			self._global_cleanse = True
+		self._cp_iter = cp_iter
+		self._consumer = consumer
+
+		if max_jobs is None:
+			max_jobs = 1
+
+		self._max_jobs = max_jobs
+		self._max_load = max_load
+		self._sched_iface = self._sched_iface_class(
+			register=self._register,
+			schedule=self._schedule_wait,
+			unregister=self._unregister)
+
+		self._valid_pkgs = set()
+		self._cp_set = set()
+		self._process_iter = self._iter_metadata_processes()
+		self.returncode = os.EX_OK
+		self._error_count = 0
+
+	def _iter_every_cp(self):
+		every_cp = self._portdb.cp_all()
+		every_cp.sort(reverse=True)
+		try:
+			while True:
+				yield every_cp.pop()
+		except IndexError:
+			pass
+
+	def _iter_metadata_processes(self):
+		portdb = self._portdb
+		valid_pkgs = self._valid_pkgs
+		cp_set = self._cp_set
+		consumer = self._consumer
+
+		for cp in self._cp_iter:
+			cp_set.add(cp)
+			portage.writemsg_stdout("Processing %s\n" % cp)
+			cpv_list = portdb.cp_list(cp)
+			for cpv in cpv_list:
+				valid_pkgs.add(cpv)
+				ebuild_path, repo_path = portdb.findname2(cpv)
+				metadata, st, emtime = portdb._pull_valid_cache(
+					cpv, ebuild_path, repo_path)
+				if metadata is not None:
+					if consumer is not None:
+						consumer(cpv, ebuild_path,
+							repo_path, metadata)
+					continue
+
+				yield EbuildMetadataPhase(cpv=cpv, ebuild_path=ebuild_path,
+					ebuild_mtime=emtime,
+					metadata_callback=portdb._metadata_callback,
+					portdb=portdb, repo_path=repo_path,
+					settings=portdb.doebuild_settings)
+
+	def run(self):
+
+		portdb = self._portdb
+		from portage.cache.cache_errors import CacheError
+		dead_nodes = {}
+
+		while self._schedule():
+			self._poll_loop()
+
+		while self._jobs:
+			self._poll_loop()
+
+		if self._global_cleanse:
+			for mytree in portdb.porttrees:
+				try:
+					dead_nodes[mytree] = set(portdb.auxdb[mytree].iterkeys())
+				except CacheError, e:
+					portage.writemsg("Error listing cache entries for " + \
+						"'%s': %s, continuing...\n" % (mytree, e),
+						noiselevel=-1)
+					del e
+					dead_nodes = None
+					break
+		else:
+			cp_set = self._cp_set
+			cpv_getkey = portage.cpv_getkey
+			for mytree in portdb.porttrees:
+				try:
+					dead_nodes[mytree] = set(cpv for cpv in \
+						portdb.auxdb[mytree].iterkeys() \
+						if cpv_getkey(cpv) in cp_set)
+				except CacheError, e:
+					portage.writemsg("Error listing cache entries for " + \
+						"'%s': %s, continuing...\n" % (mytree, e),
+						noiselevel=-1)
+					del e
+					dead_nodes = None
+					break
+
+		if dead_nodes:
+			for y in self._valid_pkgs:
+				for mytree in portdb.porttrees:
+					if portdb.findname2(y, mytree=mytree)[0]:
+						dead_nodes[mytree].discard(y)
+
+			for mytree, nodes in dead_nodes.iteritems():
+				auxdb = portdb.auxdb[mytree]
+				for y in nodes:
+					try:
+						del auxdb[y]
+					except (KeyError, CacheError):
+						pass
+
+	def _schedule_tasks(self):
+		"""
+		@rtype: bool
+		@returns: True if there may be remaining tasks to schedule,
+			False otherwise.
+		"""
+		while self._can_add_job():
+			try:
+				metadata_process = self._process_iter.next()
+			except StopIteration:
+				return False
+
+			self._jobs += 1
+			metadata_process.scheduler = self._sched_iface
+			metadata_process.addExitListener(self._metadata_exit)
+			metadata_process.start()
+		return True
+
+	def _metadata_exit(self, metadata_process):
+		self._jobs -= 1
+		if metadata_process.returncode != os.EX_OK:
+			self.returncode = 1
+			self._error_count += 1
+			self._valid_pkgs.discard(metadata_process.cpv)
+			portage.writemsg("Error processing %s, continuing...\n" % \
+				(metadata_process.cpv,), noiselevel=-1)
+
+		if self._consumer is not None:
+			# On failure, still notify the consumer (in this case the metadata
+			# argument is None).
+			self._consumer(metadata_process.cpv,
+				metadata_process.ebuild_path,
+				metadata_process.repo_path,
+				metadata_process.metadata)
+
+		self._schedule()
+