From 50bea0375496f919fc40c586e8308b19f814ba66 Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Sat, 15 Sep 2012 09:53:42 -0700
Subject: [PATCH] egencache: skip auxdb write if not metadata-trans

---
 bin/egencache                      | 4 +++-
 pym/_emerge/EbuildMetadataPhase.py | 9 ++++++---
 pym/_emerge/MetadataRegen.py       | 6 ++++--
 3 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/bin/egencache b/bin/egencache
index 003567452..ec62a8c08 100755
--- a/bin/egencache
+++ b/bin/egencache
@@ -212,9 +212,11 @@ class GenCache(object):
 		else:
 			self._cp_set = None
 			self._cp_missing = set()
+		write_auxdb = "metadata-transfer" in portdb.settings.features
 		self._regen = MetadataRegen(portdb, cp_iter=cp_iter,
 			consumer=self._metadata_callback,
-			max_jobs=max_jobs, max_load=max_load)
+			max_jobs=max_jobs, max_load=max_load,
+			write_auxdb=write_auxdb)
 		self.returncode = os.EX_OK
 		conf = portdb.repositories.get_repo_for_location(tree)
 		self._trg_caches = tuple(conf.iter_pregenerated_caches(
diff --git a/pym/_emerge/EbuildMetadataPhase.py b/pym/_emerge/EbuildMetadataPhase.py
index 669b4ae2e..1ffa1bb23 100644
--- a/pym/_emerge/EbuildMetadataPhase.py
+++ b/pym/_emerge/EbuildMetadataPhase.py
@@ -25,7 +25,7 @@ class EbuildMetadataPhase(SubProcess):
 	"""
 
 	__slots__ = ("cpv", "eapi_supported", "ebuild_hash", "fd_pipes",
-		"metadata", "portdb", "repo_path", "settings") + \
+		"metadata", "portdb", "repo_path", "settings", "write_auxdb") + \
 		("_eapi", "_eapi_lineno", "_raw_metadata",)
 
 	_file_names = ("ebuild",)
@@ -180,8 +180,11 @@ class EbuildMetadataPhase(SubProcess):
 						metadata["_eclasses_"] = {}
 					metadata.pop("INHERITED", None)
 
-					self.portdb._write_cache(self.cpv,
-						self.repo_path, metadata, self.ebuild_hash)
+					# If called by egencache, this cache write is
+					# undesirable when metadata-transfer is disabled.
+					if self.write_auxdb is not False:
+						self.portdb._write_cache(self.cpv,
+							self.repo_path, metadata, self.ebuild_hash)
 				else:
 					metadata = {"EAPI": metadata["EAPI"]}
 				self.metadata = metadata
diff --git a/pym/_emerge/MetadataRegen.py b/pym/_emerge/MetadataRegen.py
index e82015fd1..234298f7e 100644
--- a/pym/_emerge/MetadataRegen.py
+++ b/pym/_emerge/MetadataRegen.py
@@ -10,9 +10,10 @@ from _emerge.PollScheduler import PollScheduler
 class MetadataRegen(PollScheduler):
 
 	def __init__(self, portdb, cp_iter=None, consumer=None,
-		max_jobs=None, max_load=None):
+		max_jobs=None, max_load=None, write_auxdb=True):
 		PollScheduler.__init__(self, main=True)
 		self._portdb = portdb
+		self._write_auxdb = write_auxdb
 		self._global_cleanse = False
 		if cp_iter is None:
 			cp_iter = self._iter_every_cp()
@@ -84,7 +85,8 @@ class MetadataRegen(PollScheduler):
 					yield EbuildMetadataPhase(cpv=cpv,
 						ebuild_hash=ebuild_hash,
 						portdb=portdb, repo_path=repo_path,
-						settings=portdb.doebuild_settings)
+						settings=portdb.doebuild_settings,
+						write_auxdb=self._write_auxdb)
 
 	def _keep_scheduling(self):
 		return self._remaining_tasks and not self._terminated_tasks
-- 
2.26.2