From 87e4675f6dc105039af181d203106879ee17a15f Mon Sep 17 00:00:00 2001
From: Sebastian Pipping <sebastian@pipping.org>
Date: Sat, 16 Jun 2012 14:24:40 +0200
Subject: Compare ebuilds ourselves rather than invoking sed and cmp

This solves the issue with "sed: [..]: Broken pipe" and saves a few process forkes
---
 overlint/cli.py | 25 ++++++++++++++++++-------
 1 file changed, 18 insertions(+), 7 deletions(-)

diff --git a/overlint/cli.py b/overlint/cli.py
index 83e2311..049e826 100644
--- a/overlint/cli.py
+++ b/overlint/cli.py
@@ -19,6 +19,7 @@ except ImportError:
 
 
 _revision_matcher = re.compile('-r([0-9]+)$')
+_ignore_matcher = re.compile('(?:^# (?:\\$Header|Copyright)|KEYWORDS=)')
 
 portdir = portage.settings["PORTDIR"]
 
@@ -91,6 +92,19 @@ def find_lagging_behind_gentoo(gentoo_versions, overlay_versions):
 	return lagging_behind_gentoo
 
 
+def _iter_important_lines(ebuild_f):
+	return (line_br for line_br in ebuild_f if _ignore_matcher.search(line_br) is None)
+
+
+def ebuilds_are_equivalent(filename_a, filename_b):
+	fa = open(filename_a, 'r')
+	fb = open(filename_b, 'r')
+	for (la, lb) in zip(_iter_important_lines(fa), _iter_important_lines(fb)):
+		if la != lb:
+			return False
+	return True
+
+
 def find_ebuild_changes(category_package, overlay_path, gentoo_versions, overlay_versions):
 	ebuild_changes = list()
 	intersection = set(gentoo_versions) & set(overlay_versions)
@@ -99,14 +113,11 @@ def find_ebuild_changes(category_package, overlay_path, gentoo_versions, overlay
 	category, package = category_package.split('/')
 	for version in intersection:
 		ebuild_name = '%s-%s.ebuild' % (package, version)
-		command = """bash -c 'FILTER() { sed -e "/# $Header/d" -e "/# Copyright/d" -e "/KEYWORDS=/d" "$@"; }; """ \
-					"""cmp --quiet <(FILTER %s/%s/%s) <(FILTER %s/%s/%s) ; """ \
-					"""exit $?'""" \
-				% (portdir, category_package, ebuild_name, overlay_path, category_package, ebuild_name)
-		ret = os.system(command)
-		if not ret:
+		filename_a = os.path.join(portdir, category_package, ebuild_name)
+		filename_b = os.path.join(overlay_path, category_package, ebuild_name)
+		if ebuilds_are_equivalent(filename_a, filename_b):
 			continue
-		# print("meld '/usr/portage/%s/%s' '%s/%s/%s'" % (category_package, ebuild_name, conf.overlay_path, category_package, ebuild_name))
+		# print("meld '%s' '%s'" % (filename_a, filename_b))
 		ebuild_changes.append(version)
 	return ebuild_changes
 
-- 
cgit v1.2.3-65-gdbad