From d63fc90d72cae46824239af0f1e5158f0d029ee0 Mon Sep 17 00:00:00 2001
From: Marius Mauch <genone@gentoo.org>
Date: Mon, 3 Dec 2007 19:09:20 +0000
Subject: [PATCH] implement the final part of FEATURES=preserved-libs and
 remove previously preserved libs that don't have any consumers left. Also fix
 the notice if preserved libs are found to use the preserved-rebuild package
 set instead of revdep-rebuild.

svn path=/main/trunk/; revision=8821
---
 bin/repoman                  |  1 +
 cnf/sets.conf                |  5 +++++
 pym/_emerge/__init__.py      |  2 +-
 pym/portage/dbapi/vartree.py | 40 ++++++++++++++++++++++++++++++++++--
 pym/portage/sets/__init__.py |  2 +-
 5 files changed, 46 insertions(+), 4 deletions(-)

diff --git a/bin/repoman b/bin/repoman
index f6ab04dc9..e404a9159 100755
--- a/bin/repoman
+++ b/bin/repoman
@@ -313,6 +313,7 @@ qawarnings=[
 "IUSE.invalid",
 "KEYWORDS.stupid",
 "KEYWORDS.missing",
+"LICENSE.missing",
 "RESTRICT.invalid",
 "ebuild.minorsyn",
 "ebuild.badheader",
diff --git a/cnf/sets.conf b/cnf/sets.conf
index 8f7852b85..7b3f4e9b1 100644
--- a/cnf/sets.conf
+++ b/cnf/sets.conf
@@ -32,3 +32,8 @@ class = portage.sets.dbapi.EverythingSet
 class = portage.sets.files.StaticFileSet
 multiset = true
 directory = /etc/portage/sets
+
+# Set to rebuild all packages that need a preserved lib that only remains due
+# to FEATURES=preserved-libs
+[preserved-rebuild]
+class = portage.sets.dbapi.PreservedConsumerSet
diff --git a/pym/_emerge/__init__.py b/pym/_emerge/__init__.py
index 559a0c685..4af56b273 100644
--- a/pym/_emerge/__init__.py
+++ b/pym/_emerge/__init__.py
@@ -5068,7 +5068,7 @@ def post_emerge(trees, mtimedb, retval):
 			print colorize("WARN", ">>>") + " package: %s" % cpv
 			for f in plibdata[cpv]:
 				print colorize("WARN", " * ") + " - %s" % f
-		print "Use " + colorize("GOOD", "revdep-rebuild") + " to rebuild packages using these libraries"
+		print "Use " + colorize("GOOD", "emerge @preserved-rebuild") + " to rebuild packages using these libraries"
 		print "and then remerge the packages listed above."
 
 	sys.exit(retval)
diff --git a/pym/portage/dbapi/vartree.py b/pym/portage/dbapi/vartree.py
index cc34a133a..d75029dc6 100644
--- a/pym/portage/dbapi/vartree.py
+++ b/pym/portage/dbapi/vartree.py
@@ -1125,7 +1125,8 @@ class dblink(object):
 			self._unmerge_pkgfiles(pkgfiles, others_in_slot)
 			
 			# Remove the registration of preserved libs for this pkg instance
-			self.vartree.dbapi.plib_registry.unregister(self.mycpv, self.settings["SLOT"], self.settings["COUNTER"])
+			plib_registry = self.vartree.dbapi.plib_registry
+			plib_registry.unregister(self.mycpv, self.settings["SLOT"], self.settings["COUNTER"])
 
 			if myebuildpath:
 				ebuild_phase = "postrm"
@@ -1140,7 +1141,42 @@ class dblink(object):
 
 			# regenerate reverse NEEDED map
 			self.vartree.dbapi.libmap.update()
-
+			
+			# remove preserved libraries that don't have any consumers left
+			# FIXME: this code is quite ugly and can likely be optimized in several ways
+			plib_dict = plib_registry.getPreservedLibs()
+			for cpv in plib_dict:
+				keeplist = []
+				plib_dict[cpv].sort()
+				for f in plib_dict[cpv]:
+					if not os.path.exists(f) or os.path.realpath(f) in keeplist:
+						continue
+					unlink_list = []
+					while os.path.islink(f):
+						if os.path.basename(f) in self.vartree.dbapi.libmap.get():
+							unlink_list = []
+							keeplist.append(os.path.realpath(f))
+							break
+						else:
+							unlink_list.append(f)
+							f = os.readlink(f)
+					if not os.path.islink(f) and not os.path.basename(f) in self.vartree.dbapi.libmap.get():
+						unlink_list.append(f)
+					for obj in unlink_list:
+						try:
+							if os.path.islink(f):
+								obj_type = "sym"
+							else:
+								obj_type = "obj"
+							writemsg_stdout("<<< !needed   %s %s\n" % (obj_type, obj))
+							os.unlink(obj)
+						except OSError, e:
+							if e.errno == errno.ENOENT:
+								pass
+							else:
+								raise e
+			plib_registry.pruneNonExisting()
+						
 		finally:
 			if builddir_lock:
 				try:
diff --git a/pym/portage/sets/__init__.py b/pym/portage/sets/__init__.py
index 940aa1020..30c2bff49 100644
--- a/pym/portage/sets/__init__.py
+++ b/pym/portage/sets/__init__.py
@@ -130,7 +130,7 @@ def make_default_config(settings, trees):
 	sc.set("user-sets", "multiset", "true")
 
 	sc.add_section("rebuild-needed")
-	sc.set("rebuild-needed", "class", "portage.sets.dbapi.MissingLibraryConsumerSet")
+	sc.set("rebuild-needed", "class", "portage.sets.dbapi.PreservedLibraryConsumerSet")
 	
 	return sc
 
-- 
2.26.2