From d9b10deaa03ce174d5ccc3b59c477549ad87e884 Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Sun, 18 Nov 2007 02:50:49 +0000
Subject: [PATCH] Bug #198398 - Enable Manifest generation when there are no
 hash functions available for types such as RMD160. Now it's possible to
 generate a Manifest when python-2.5 is built without ssl support.
 MANIFEST1_REQUIRED_HASH and MANIFEST2_REQUIRED_HASH are the only two
 functions that are strictly required now (MD5 and SHA1).

svn path=/main/trunk/; revision=8521
---
 pym/portage/const.py    |  2 ++
 pym/portage/manifest.py | 20 +++++++++++++++-----
 2 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/pym/portage/const.py b/pym/portage/const.py
index de17634b4..733029fa4 100644
--- a/pym/portage/const.py
+++ b/pym/portage/const.py
@@ -62,6 +62,8 @@ EAPI = 1
 HASHING_BLOCKSIZE        = 32768
 MANIFEST1_HASH_FUNCTIONS = ["MD5","SHA256","RMD160"]
 MANIFEST2_HASH_FUNCTIONS = ["SHA1","SHA256","RMD160"]
+
+MANIFEST1_REQUIRED_HASH = "MD5"
 MANIFEST2_REQUIRED_HASH = "SHA1"
 
 MANIFEST2_IDENTIFIERS = ["AUX","MISC","DIST","EBUILD"]
diff --git a/pym/portage/manifest.py b/pym/portage/manifest.py
index 93182f764..82ca37efb 100644
--- a/pym/portage/manifest.py
+++ b/pym/portage/manifest.py
@@ -107,11 +107,16 @@ class Manifest(object):
 			a Manifest (not needed for parsing and checking sums)."""
 		self.pkgdir = pkgdir.rstrip(os.sep) + os.sep
 		self.fhashdict = {}
-		self.hashes = portage.const.MANIFEST2_HASH_FUNCTIONS[:]
-		self.hashes.append("size")
+		self.hashes = set()
+		self.hashes.update(portage.const.MANIFEST2_HASH_FUNCTIONS)
 		if manifest1_compat:
-			self.hashes.extend(portage.const.MANIFEST1_HASH_FUNCTIONS)
-		self.hashes = set(self.hashes)
+			self.hashes.update(portage.const.MANIFEST1_HASH_FUNCTIONS)
+		self.hashes.difference_update(hashname for hashname in \
+			list(self.hashes) if hashname not in hashfunc_map)
+		self.hashes.add("size")
+		if manifest1_compat:
+			self.hashes.add(portage.const.MANIFEST1_REQUIRED_HASH)
+		self.hashes.add(portage.const.MANIFEST2_REQUIRED_HASH)
 		for t in portage.const.MANIFEST2_IDENTIFIERS:
 			self.fhashdict[t] = {}
 		self.compat = manifest1_compat
@@ -327,11 +332,16 @@ class Manifest(object):
 		if self.compat:
 			cvp_list = self.fetchlist_dict.keys()
 			cvp_list.sort()
+			manifest1_hashes = set(hashname for hashname in \
+				portage.const.MANIFEST1_HASH_FUNCTIONS \
+				if hashname in hashfunc_map)
+			manifest1_hashes.add(portage.const.MANIFEST1_REQUIRED_HASH)
+			manifest1_hashes.add("size")
 			for cpv in cvp_list:
 				digest_path = os.path.join("files", "digest-%s" % self._catsplit(cpv)[1])
 				dname = os.path.join(self.pkgdir, digest_path)
 				try:
-					myhashes = perform_multiple_checksums(dname, portage.const.MANIFEST1_HASH_FUNCTIONS+["size"])
+					myhashes = perform_multiple_checksums(dname, manifest1_hashes)
 					myhashkeys = myhashes.keys()
 					myhashkeys.sort()
 					for h in myhashkeys:
-- 
2.26.2