From 630ad8983eaa46ff1962454be001befb2120d1b9 Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Tue, 24 Oct 2006 07:20:12 +0000
Subject: [PATCH] Remove paths from _eclasses_ serialization in the cache. 
 This makes the mtimes of the eclasses the only thing that distinguishes them,
 but the probablility of collision is negligible.  This same _eclasses_ format
 will be used to serialize eclass mtimes in cache that is distributed via the
 rsync mirrors.  The deserialization code can handle mixtures of both the old
 and new formats.

svn path=/main/trunk/; revision=4807
---
 pym/cache/template.py | 19 +++++++++++++++----
 pym/eclass_cache.py   | 12 ++++++++----
 2 files changed, 23 insertions(+), 8 deletions(-)

diff --git a/pym/cache/template.py b/pym/cache/template.py
index ff2bbeacf..547490e29 100644
--- a/pym/cache/template.py
+++ b/pym/cache/template.py
@@ -157,7 +157,8 @@ class database(object):
 
 def serialize_eclasses(eclass_dict):
 	"""takes a dict, returns a string representing said dict"""
-	return "\t".join(["%s\t%s\t%s" % (k, v[0], str(v[1])) for k,v in eclass_dict.items()])
+	return "\t".join(["%s\t%s" % (k, str(v)) \
+		for k, v in eclass_dict.iteritems()])
 
 def reconstruct_eclasses(cpv, eclass_string):
 	"""returns a dict when handed a string generated by serialize_eclasses"""
@@ -165,10 +166,20 @@ def reconstruct_eclasses(cpv, eclass_string):
 	if eclasses == [""]:
 		# occasionally this occurs in the fs backends.  they suck.
 		return {}
-	if len(eclasses) % 3 != 0:
+	
+	if len(eclasses) % 2 != 0 and len(eclasses) % 3 != 0:
 		raise cache_errors.CacheCorruption(cpv, "_eclasses_ was of invalid len %i" % len(eclasses))
 	d={}
-	for x in range(0, len(eclasses), 3):
-		d[eclasses[x]] = (eclasses[x + 1], long(eclasses[x + 2]))
+	has_paths = False
+	try:
+		long(eclasses[1])
+	except ValueError:
+		has_paths = True
+	if has_paths:
+		for x in range(0, len(eclasses), 3):
+			d[eclasses[x]] = long(eclasses[x + 2])
+	else:
+		for x in range(0, len(eclasses), 2):
+			d[eclasses[x]] = long(eclasses[x + 1])
 	del eclasses
 	return d
diff --git a/pym/eclass_cache.py b/pym/eclass_cache.py
index 8d2a2bb81..904e63261 100644
--- a/pym/eclass_cache.py
+++ b/pym/eclass_cache.py
@@ -15,6 +15,7 @@ class cache:
 		self.porttree_root = porttree_root
 
 		self.eclasses = {} # {"Name": ("location","_mtime_")}
+		self._eclass_locations = {}
 
 		# screw with the porttree ordering, w/out having bash inherit match it, and I'll hurt you.
 		# ~harring
@@ -38,6 +39,7 @@ class cache:
 
 	def update_eclasses(self):
 		self.eclasses = {}
+		self._eclass_locations = {}
 		eclass_len = len(".eclass")
 		for x in [normalize_path(os.path.join(y,"eclass")) for y in self.porttrees]:
 			if not os.path.isdir(x):
@@ -48,13 +50,14 @@ class cache:
 				except OSError:
 					continue
 				ys=y[:-eclass_len]
-				self.eclasses[ys] = (x, long(mtime))
+				self.eclasses[ys] = long(mtime)
+				self._eclass_locations[ys] = x
 	
 	def is_eclass_data_valid(self, ec_dict):
 		if not isinstance(ec_dict, dict):
 			return False
-		for eclass, tup in ec_dict.iteritems():
-			if eclass not in self.eclasses or tuple(tup) != self.eclasses[eclass]:
+		for eclass, mtime in ec_dict.iteritems():
+			if eclass not in self.eclasses or mtime != self.eclasses[eclass]:
 				return False
 
 		return True
@@ -68,7 +71,8 @@ class cache:
 				print "ec=",ec_dict
 				print "inherits=",inherits
 				raise
-			if from_master_only and self.eclasses[x][0] != self._master_eclass_root:
+			if from_master_only and \
+				self._eclass_locations[x] != self._master_eclass_root:
 				return None
 
 		return ec_dict
-- 
2.26.2