#!/bin/bash
#
# pkglist - create a list of packages to be merged with mergelist

# if no parameters are given, just create a full list of pkgs on the system (w/ versions)
[[ $# -lt 1 ]] && ACTION="full"

# print usage message
[[ $# -gt 1 ]] && echo "Usage: pkglist [system|world]"

# other ACTIONS can be added here later.  right now we just default to passing any params
# straight to emerge. (think "system")

case $ACTION in
	"full" )
		echo "Creating list of all installed packages in ~/pkglist..."
		find /var/db/pkg/ -iname "*.ebuild" \
			| cut -f5,7 -d/ \
			> ~/pkglist
		sort ~/pkglist -o ~/pkglist
	;;
	* )
		echo "Creating list for emerge target \"$@\" in ~/pkglist..."
		emerge -ep "$@" \
			| sed -e '/^\[.*/!d' \
			> ~/pkglist
	;;
esac

# this bit should sanitize ~/pkglist for use by mergelist.
# after passing through here, ~/pkglist will be a list in the form:
#
#   ~category/pkgname-version-rev

sed -i -e 's:\.ebuild$::g' \
	-e 's:\[ebuild.*\].::g' \
	-e '/^$/d' \
	-e 's:USE=.*$::g' \
	-e 's:\(^.*$\):~\1:g' \
	-e '/^.*virtual\/.*$/d' \
	-e '/^.*x11-proto\/.*$/d' \
	~/pkglist