From dba76dae66661d5ca872baee00d6715b88dfeaa8 Mon Sep 17 00:00:00 2001
From: Stefan Fiedler <stefan.fiedler@students.jku.at>
Date: Sun, 11 Jul 2004 20:43:27 +0000
Subject: [PATCH] Stefan Fiedler: 	scripts/config.in: add support for
 pkgforked packages in package 	selection rules and comment the pkgsel code.

[2004070523563628767] (https://www.rocklinux.net/submaster)



git-svn-id: http://www.rocklinux.org/svn/rock-linux/trunk@3559 c5f82cb5-29bc-0310-9cd0-bff59a50e3bc
---
 scripts/config.in | 27 ++++++++++++++++++++++++---
 1 file changed, 24 insertions(+), 3 deletions(-)

diff --git a/scripts/config.in b/scripts/config.in
index 40367b172..fbb5ca43f 100644
--- a/scripts/config.in
+++ b/scripts/config.in
@@ -185,6 +185,23 @@ expert_begin
 		editfile ROCKCFG_PKGSEL_FILE config/$config/pkgsel \
 		         'Package selection rules'
 
+# Create an awk program from the list of package selection rules stored in 
+# config/$config/pkgsel which is applied to the list of packages stored in 
+# config/$config/packages.
+# Syntax for package selection rules is:
+# <action> <patternlist>
+# <action> is a single character: x or X enables the packages matching 
+# <patternlist>, o or O disables them, - omits them in the packages list.
+# Any other character exits the awk program, resulting in an empty list.
+# <patternlist> consists of one or more white-space separated <pattern>s.
+# <pattern> consists of letters, numbers, and characters _ * + . = -
+# <action> is performed on every line in the list matching all <pattern>s of a rule.
+# If the first <pattern> of a rule is a !, <action> is performed on every line 
+# _not_ matching _any_ <pattern> of a rule.
+# A <pattern> of the form <base-pkg>=<derived-pkg> denotes a pkgforked package;
+# such a <pattern> will duplicate the line of the <base-pkg> and substitute its
+# package name with the name of the pkgforked package, that is, the <pattern>.
+
 		echo "# created from 'pkgsel'" > config/$config/pkgsel.awk
 		while read action patternlist ; do
 			case "$action" in
@@ -205,12 +222,16 @@ expert_begin
 					address="! " ; others="||"
 				else
 					pattern="$( echo "$pattern" | sed \
-						-e 's,[^a-zA-Z0-9_/\*+\.-],,g' \
+						-e 's,[^a-zA-Z0-9_/\*+\.=-],,g' \
 						-e 's,[/\.\+],\\&,g' \
 						-e 's,\*,[^ ]*,g' )"
 					[ "$pattern" ] || continue
-					address="$address$first"
-					address="$address / $pattern /"
+# check if pattern describes a pkgforked package
+					if [ "$pattern" != "${pattern%=*}" ] ; then
+						action="print; $action; \$5=\"$pattern\""
+						pattern=${pattern%=*}
+					fi
+					address="$address$first / $pattern /"
 					first=" $others"
 				fi
 			done < <( echo "$patternlist" | tr '\t ' '\n\n' )