rocklinux/misc/pkgsel/config-100.in

#!/bin/bash
expert_begin
    comment ' '
    comment '- Additional Package Selection'
    block_begin 3
      choice ROCKCFG_PKGSEL_TPL none none 'No package preselection template' \
		$( cd misc/pkgsel ; grep -H "^# TITLE: " *.in | \
			tr ' ' '_' | sed 's,\.in:#_TITLE:_, ,' )
	if [ "$ROCKCFG_EXPERT" == 1 ] ; then
		if [ -f misc/pkgsel/${ROCKCFG_PKGSEL_TPL}.in ]; then
			pkgfilter sed -e "$( . ./misc/pkgsel/macros 
			. ./misc/pkgsel/${ROCKCFG_PKGSEL_TPL}.in)"
		fi
	fi

      bool 'Custom package selection' ROCKCFG_PKGSEL 0
      if [ "$ROCKCFG_PKGSEL" = 1 ] ; then
	menu_begin MENU_PKGSEL_RULES 'Edit package selection rules'
		editfile ROCKCFG_PKGSEL_FILE config/$config.$swpid/pkgsel \
		         'Package selection rules'
	menu_end

# 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.
# <patternlist> consists of one or more white-space separated sed patterns.
# <action> is performed on every line in the list matching all patterns 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.

	if [ "$ROCKCFG_EXPERT" == 1 ] ; then
		filterscript=""
		while read action not patternlist ; do
			[ "$not" != "!" ] && { patternlist="$not" ; not="" ; }
			case "$action" in
			    [xX])	action='s,^O ,X ,' ;;
			    [oO])	action='s,^X ,O ,' ;;
			    -)		action='d' ;;
			    *)		continue ;;
			esac
			while read pattern ; do
				filterscript="$filterscript /[ =]$pattern / $not $action ;"
			done < <( echo "$patternlist" | tr '\t ' '\n\n' )
		done < config/$config.$swpid/pkgsel
		pkgfilter sed -e "$filterscript"
	fi
      fi

      startprog ROCKCFG_SHOW_PKGLIST 'Show the current package list' \
		"sort -k1,1r -k3,3n \
			< config/$config.$swpid/packages \
		| cut -f1,2,4,5,8- -d' ' | sed 's, [^ ]*$,,' \
		| tr ' ' '\t' | expand -t2,13,30, \
			> config/$config.$swpid/packages.txt ; \
		./src/rockdialog.bin --title 'ROCK Linux Config - Package List' \
			--backtitle 'ROCK Linux $rockver Configuration' \
			--textbox config/$config.$swpid/packages.txt \
			$(( $lines - 4 )) $(( $columns - 5 ))"
    block_end
expert_end