[patch] detect bash here-documents and leave them intact

here_docs.patch (text/plain), 2.79 KB, created by Zac Medico on 2007-12-13 08:55:15 UTC

Index: bin/filter-bash-environment.py
===================================================================
--- bin/filter-bash-environment.py	(revision 0)
+++ bin/filter-bash-environment.py	(revision 8899)
@@ -0,0 +1,52 @@
+#!/usr/bin/env python
+# Copyright 1999-2007 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+import os, re, sys
+
+egrep_compat_map = {
+	"[:alnum:]" : r'\w',
+	"[:space:]" : r'\s',
+}
+
+here_doc_re = re.compile(r'.*\s<<[-]?(\w+)$')
+
+def compile_egrep_pattern(s):
+	for k, v in egrep_compat_map.iteritems():
+		s = s.replace(k, v)
+	return re.compile(s)
+
+def filter_bash_environment(pattern, file_in, file_out):
+	here_doc_delim = None
+	for line in file_in:
+		if here_doc_delim is not None:
+			if here_doc_delim.match(line):
+				here_doc_delim = None
+			file_out.write(line)
+			continue
+		here_doc = here_doc_re.match(line)
+		if here_doc is not None:
+			here_doc_delim = re.compile("^%s$" % here_doc.group(1))
+			file_out.write(line)
+			continue
+		if pattern.match(line) is None:
+			file_out.write(line)
+
+if __name__ == "__main__":
+	description = "Filter out any lines that match a given PATTERN " + \
+		"while leaving bash here-documents intact. The PATTERN should " + \
+		"use python regular expression syntax but [:space:] and " + \
+		"[:alnum:] character classes will be automatically translated " + \
+		"for compatibility with egrep syntax."
+	usage = "usage: %s PATTERN" % os.path.basename(sys.argv[0])
+	from optparse import OptionParser
+	parser = OptionParser(description=description, usage=usage)
+	options, args = parser.parse_args(sys.argv[1:])
+	if len(args) != 1:
+		parser.error("Missing required PATTERN argument.")
+	file_in = sys.stdin
+	file_out = sys.stdout
+	filter_bash_environment(
+		compile_egrep_pattern(args[0]), file_in, file_out)
+	file_out.flush()

Property changes on: bin/filter-bash-environment.py
___________________________________________________________________
Name: svn:executable
   + *
Name: svn:keywords
   + Id

Index: bin/ebuild.sh
===================================================================
--- bin/ebuild.sh	(revision 8898)
+++ bin/ebuild.sh	(revision 8899)
@@ -1425,9 +1425,9 @@
 	# listed in READONLY_EBUILD_METADATA, since having any readonly attributes
 	# persisting in the saved environment can be inconvenient when it
 	# eventually needs to be reloaded.
-	egrep -v -e "${var_grep}" | sed \
-		-e 's:^declare[[:space:]]\+-r[[:space:]]\+::' \
-		-e 's:^declare[[:space:]]\+-\([[:alnum:]]*\)r\([[:alnum:]]*\)[[:space:]]\+:declare -\1\2 :'
+	"${PORTAGE_BIN_PATH}"/filter-bash-environment.py "${var_grep}" | sed -r \
+		-e 's:^declare[[:space:]]+-r[[:space:]]+:declare :' \
+		-e 's:^declare[[:space:]]+-([[:alnum:]]*)r([[:alnum:]]*)[[:space:]]+:declare -\1\2 :'
 }
 
 # @FUNCTION: preprocess_ebuild_env