From 602f6eacef5ab3eb73f3846078ff42a1920ac6ca Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Thu, 6 Mar 2008 01:03:42 +0000
Subject: Implement the sed-based declare -r filter in python.

svn path=/main/trunk/; revision=9446
---
 bin/ebuild.sh                  | 10 +---------
 bin/filter-bash-environment.py | 13 +++++++++++++
 2 files changed, 14 insertions(+), 9 deletions(-)

(limited to 'bin')

diff --git a/bin/ebuild.sh b/bin/ebuild.sh
index 542fca9e2..cfe225006 100755
--- a/bin/ebuild.sh
+++ b/bin/ebuild.sh
@@ -1441,15 +1441,7 @@ filter_readonly_variables() {
 		"
 	fi
 
-	# TODO: Take the the below sed-based declare -r filter and integrate it
-	#       directly into filter-bash-environment.py.
-	# The sed is to remove the readonly attribute from variables such as those
-	# 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.
-	"${PORTAGE_BIN_PATH}"/filter-bash-environment.py "${filtered_vars}" | sed -r \
-		-e 's:^declare[[:space:]]+-r[[:space:]]+:declare :' \
-		-e 's:^declare[[:space:]]+-([[:alnum:]]*)r([[:alnum:]]*)[[:space:]]+:declare -\1\2 :'
+	"${PORTAGE_BIN_PATH}"/filter-bash-environment.py "${filtered_vars}"
 }
 
 # @FUNCTION: preprocess_ebuild_env
diff --git a/bin/filter-bash-environment.py b/bin/filter-bash-environment.py
index ab348d992..5e109295f 100755
--- a/bin/filter-bash-environment.py
+++ b/bin/filter-bash-environment.py
@@ -17,6 +17,7 @@ func_end_re = re.compile(r'^\}$')
 
 var_assign_re = re.compile(r'(^|^declare\s+-\S+\s+|^export\s+)([^=\s]+)=("|\')?.*$')
 close_quote_re = re.compile(r'(\\"|"|\')\s*$')
+readonly_re = re.compile(r'^declare\s+-(\S*)r(\S*)\s+')
 
 def compile_egrep_pattern(s):
 	for k, v in egrep_compat_map.iteritems():
@@ -57,6 +58,18 @@ def filter_bash_environment(pattern, file_in, file_out):
 					multi_line_quote = quote
 					multi_line_quote_filter = filter_this
 				if not filter_this:
+					readonly_match = readonly_re.match(line)
+					if readonly_match is not None:
+						declare_opts = ""
+						for i in (1, 2):
+							group = readonly_match.group(i)
+							if group is not None:
+								declare_opts += group
+						if declare_opts:
+							line = "declare -%s %s" % \
+								(declare_opts, line[readonly_match.end():])
+						else:
+							line = "declare " + line[readonly_match.end():]
 					file_out.write(line)
 				continue
 		if here_doc_delim is not None:
-- 
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