From 360778208e003d0644bab8b769e6ba02b82f2190 Mon Sep 17 00:00:00 2001
From: Sebastian Luther <SebastianLuther@gmx.de>
Date: Mon, 4 Oct 2010 20:41:28 +0200
Subject: egencache: Sort file names for ChangeLog

---
 bin/egencache | 82 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 76 insertions(+), 6 deletions(-)

diff --git a/bin/egencache b/bin/egencache
index b2f208fce..bf4b6d567 100755
--- a/bin/egencache
+++ b/bin/egencache
@@ -38,10 +38,11 @@ except ImportError:
 from portage import os, _encodings, _unicode_encode, _unicode_decode
 from _emerge.MetadataRegen import MetadataRegen
 from portage.cache.cache_errors import CacheError, StatCollision
+from portage.manifest import guessManifestFileType
 from portage.util import cmp_sort_key, writemsg_level
 from portage import cpv_getkey
 from portage.dep import Atom, isjustname
-from portage.versions import pkgcmp, pkgsplit
+from portage.versions import pkgcmp, pkgsplit, vercmp
 
 try:
 	import xml.etree.ElementTree
@@ -463,6 +464,71 @@ class GenUseLocalDesc(object):
 
 		output.close()
 
+if sys.hexversion < 0x3000000:
+	_filename_base = unicode
+else:
+	_filename_base = str
+
+class _special_filename(_filename_base):
+	"""
+	Helps to sort file names by file type and other criteria.
+	"""
+	def __new__(cls, status_change, file_name):
+		return _filename_base.__new__(cls, status_change + file_name)
+
+	def __init__(self, status_change, file_name):
+		_filename_base.__init__(status_change + file_name)
+		self.status_change = status_change
+		self.file_name = file_name
+		self.file_type = guessManifestFileType(file_name)
+
+	def file_type_lt(self, a, b):
+		"""
+		Defines an ordering between file types.
+		"""
+		first = a.file_type
+		second = b.file_type
+		if first == second:
+			return False
+
+		if first == "EBUILD":
+			return True
+		elif first == "MISC":
+			return second in ("EBUILD",)
+		elif first == "AUX":
+			return second in ("EBUILD", "MISC")
+		elif first == "DIST":
+			return second in ("EBUILD", "MISC", "AUX")
+		elif first is None:
+			return False
+		else:
+			raise ValueError("Unknown file type '%s'" % first)
+
+	def __lt__(self, other):
+		"""
+		Compare different file names, first by file type and then
+		for ebuilds by version and lexicographically for others.
+		EBUILD < MISC < AUX < DIST < None
+		"""
+		if self.__class__ != other.__class__:
+			raise NotImplementedError
+
+		# Sort by file type as defined by file_type_lt().
+		if self.file_type_lt(self, other):
+			return True
+		elif self.file_type_lt(other, self):
+			return False
+
+		# Files have the same type.
+		if self.file_type == "EBUILD":
+			# Sort by version. Lowest first.
+			ver = "-".join(pkgsplit(self.file_name[:-7])[1:3])
+			other_ver = "-".join(pkgsplit(other.file_name[:-7])[1:3])
+			return vercmp(ver, other_ver) < 0
+		else:
+			# Sort lexicographically.
+			return self.file_name < other.file_name
+
 class GenChangeLogs(object):
 	def __init__(self, portdb):
 		self.returncode = os.EX_OK
@@ -537,11 +603,11 @@ class GenChangeLogs(object):
 					elif f[1] == 'ChangeLog':
 						pass
 					elif f[0].startswith('A'):
-						changed.append('+%s' % f[1])
+						changed.append(_special_filename("+", f[1]))
 					elif f[0].startswith('D'):
-						changed.append('-%s' % f[1])
+						changed.append(_special_filename("-", f[1]))
 					elif f[0].startswith('M'):
-						changed.append(f[1])
+						changed.append(_special_filename("", f[1]))
 					else:
 						writemsg_level(
 							"ERROR: unexpected git file status for %s: %s\n" % (cp,f,),
@@ -554,7 +620,7 @@ class GenChangeLogs(object):
 			(ts, author) = cinfo[0].split(' ', 1)
 			date = time.strftime('%d %b %Y', time.gmtime(float(ts)))
 
-			# XXX: sort changes (ebuilds should go by PV)
+			changed = [str(x) for x in sorted(changed)]
 
 			wroteheader = False
 			for c in changed:
@@ -592,6 +658,7 @@ class GenChangeLogs(object):
 	def run(self):
 		repo_path = self._portdb.porttrees[0]
 		os.chdir(repo_path)
+
 		if 'git' not in FindVCS():
 			writemsg_level(
 				"ERROR: --update-changelogs supported only in git repos\n",
@@ -601,10 +668,13 @@ class GenChangeLogs(object):
 
 		for cp in self._portdb.cp_all():
 			os.chdir(os.path.join(repo_path, cp))
-
 			# Determine whether ChangeLog is up-to-date by comparing
 			# the newest commit timestamp with the ChangeLog timestamp.
 			lmod = self.grab(['git', 'log', '--format=%ct', '-1', '.'])
+			if not lmod:
+				# This cp has not been added to the repo.
+				continue
+
 			try:
 				cmod = os.stat('ChangeLog').st_mtime
 			except OSError:
-- 
cgit v1.2.3-1-g7c22