From 267cb3a3fa701384c4723941dae03d499794f652 Mon Sep 17 00:00:00 2001
From: sparky <sparky@pld-linux.org>
Date: Sun, 23 Nov 2008 18:54:07 +0000
Subject: [PATCH] - add _clean_env with _preserve_env support

Changed files:
    rpm.macros -> 1.495
---
 rpm.macros | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/rpm.macros b/rpm.macros
index 62a2b46..b334e6d 100644
--- a/rpm.macros
+++ b/rpm.macros
@@ -121,6 +121,30 @@
         };
 }')
 
+#-----------------------------------------------------------------
+#
+#  Generate a command which cleans environment, leaving only the
+# most important variables.
+#  If any spec requires any additional environment it should
+# redefine %_preserve_env in following manner:
+#
+#	# ADDITIONAL_VAR is required because [a good reason here]
+#	%{expand:%%define _preserve_env %_preserve_env ADDITIONAL_VAR}
+
+%_preserve_env	HOME TMP TMPDIR
+
+%_clean_env		env -i %(awk 'BEGIN {
+	split("%{?_preserve_env:%_preserve_env}",P);
+	for ( i in P ) {
+		p = P[ i ];
+		if ( ENVIRON[ p ] ) {
+			val = ENVIRON[ p ];
+			gsub( /[\\\\"$`]/, "\\\\\\&", val );
+			printf( "\\"" p "=" val "\\" ");
+		}
+	}
+}')
+
 #-----------------------------------------------------------------
 %configure2_13 { \
  if [ -n "$LINGUAS" ]; then unset LINGUAS; fi; \
-- 
2.43.0