#!/bin/bash

log()
{
	echo "=== $@"
}

err()
{
	log $@
}

fatal()
{
	err $@
	exit 1
}

lp()
{
	scm.sh ls-files | grep "/$1$"
}

usage()
{
	echo "$myname [-h] [-t target-dir ] [ package-name ]"
	[ "$1" ] && exit $1
}

collect_changes()
{
	local projs="$*"
	local proj changed_path project_path p b lp

	[ "$projs" ] || {
		if [ -f .git ]; then
			projs=`pwd | xargs basename`
			projs="$proj-run $proj-devel"
		else
			projs="$(jw-pkg list | sed 's/-[0-9].*//')"
		fi
	}

	for proj in $projs; do
		(
			changed_paths=`rpm -qV $proj | sed '
				/^..5.*/ !d	
				s%^..5......  . /%/%
			'`
			[ "$changed_paths" ] || exit
			project_path=$(echo $proj | sed 's/-run$\|-devel$//')

			cd $project_path || {
				err "Failed to change to $project_path"
				exit
			}

			log "Handling project $proj"

			for p in $changed_paths; do
				[ -r $p ] || {
					err "can't read $p"
					continue
				}
				b=`basename $p`
				lp=`lp "$b"`
				[ "$lp" ] || {
					err "$p is not in repository"
					continue
				}
				nl=`lp "$b" | wc -l`
				[ $nl -gt 1 ] && {
					log $p is more than once in repository:
					lp $b
					continue
				}
				diff -q $lp $p >/dev/null 2>&1 && {
					continue
				}
				log copying $p $lp
				cp $p $lp
			done
		)
	done
}

# -- here we go

set -- `getopt 'ht:' $*`
while [ "$1" != -- ]; do
	case "$1" in
	-h)
		usage 0
		;;
	-t)
		target="$2"
		shift
		;;
	*)
		usage 1
		;;
	esac
	shift
done
shift

[ "$target" ] && {
	cd $target || fatal "failed to change to target dir \"$target\""
}

collect_changes