From 39c89b95ba4843fd746a23717638f6ede8fb86ad Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Fri, 18 Jul 2008 12:40:58 +0000
Subject: Bug #199788 - Make repoman parse GLEP 56 USE flag descriptions from
 metadata.xml (in addition to use.local.desc). Thanks to Doug Goldstein
 <cardoe@g.o> for this patch.

svn path=/main/trunk/; revision=11126
---
 bin/repoman              | 15 +++++++++++++++
 pym/repoman/utilities.py | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 48 insertions(+)

diff --git a/bin/repoman b/bin/repoman
index 2c34ac919..e53ae076a 100755
--- a/bin/repoman
+++ b/bin/repoman
@@ -1072,6 +1072,16 @@ for x in scanlist:
 				stats["metadata.bad"]+=1
 				fails["metadata.bad"].append(x+"/metadata.xml")
 
+	#load USE flags from metadata.xml
+	muselist=[]
+	try:
+		f = open(os.path.join(checkdir, "metadata.xml"))
+		utilities.parse_metadata_use(f, muselist)
+		f.close()
+	except (IOError, OSError, ParseError), e:
+		logging.exception("Couldn't read from metadata.xml", e)
+		sys.exit(1)
+
 	allmasked = True
 
 	for y in ebuildlist:
@@ -1354,6 +1364,11 @@ for x in scanlist:
 			if flag_name not in uselist:
 				myuse.append(flag_name)
 
+		# uselist checks - metadata
+		for mypos in range(len(myuse)-1,-1,-1):
+			if myuse[mypos] and (myuse[mypos] in muselist):
+				del myuse[mypos]
+
 		# uselist checks - local
 		mykey = portage.dep_getkey(catpkg)
 		if mykey in luselist:
diff --git a/pym/repoman/utilities.py b/pym/repoman/utilities.py
index f6c50326b..c32f69fed 100644
--- a/pym/repoman/utilities.py
+++ b/pym/repoman/utilities.py
@@ -13,6 +13,8 @@ import logging
 import os
 import sys
 
+from xml.dom import minidom
+from xml.dom import NotFoundErr
 from portage import output
 from portage.output import red, green
 from portage.process import find_binary
@@ -111,6 +113,37 @@ def parse_use_local_desc(mylines, usedict=None):
 		usedict[pkg].add(flag)
 	return usedict
 
+def parse_metadata_use(mylines, uselist=None):
+	"""
+	Records are wrapped in XML as per GLEP 56
+	returns a dict of the form a list of flags"""
+	if uselist is None:
+		uselist = []
+	metadatadom = minidom.parse(mylines)
+
+	try:
+		usetag = metadatadom.getElementsByTagName("use")
+		if not usetag:
+			return uselist
+	except NotFoundErr:
+		return uselist
+
+	try:
+		flags = usetag[0].getElementsByTagName("flag")
+	except NotFoundErr:
+		raise exception.ParseError("metadata.xml: " + \
+			"Malformed input: missing 'flag' tag(s)")
+
+	for flag in flags:
+		pkg_flag = flag.getAttribute("name")
+		if not pkg_flag:
+			raise exception.ParseError("metadata.xml: " + \
+				"Malformed input: missing 'name' attribute for 'flag' tag")
+		uselist.append(pkg_flag)
+
+	metadatadom.unlink()
+	return uselist
+
 
 def FindPackagesToScan(settings, startdir, reposplit):
 	""" Try to find packages that need to be scanned
-- 
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