#!/bin/sh
set -e
conf=/etc/etckeeper/etckeeper.conf

usage() {
	echo "usage: etckeeper command [-d directory]" >&2
	exit 1
}

if [ -e $conf ]; then
	. $conf
fi

if [ -z "$VCS" ]; then
	echo "Please configure a VCS in $conf" >&2
	exit 1
fi
export VCS

if [ ! -z "$GIT_COMMIT_OPTIONS" ]; then
	export GIT_COMMIT_OPTIONS
fi
if [ ! -z "$HG_COMMIT_OPTIONS" ]; then
	export HG_COMMIT_OPTIONS
fi
if [ ! -z "$BZR_COMMIT_OPTIONS" ]; then
	export BZR_COMMIT_OPTIONS
fi

if [ ! -z "$HIGHLEVEL_PACKAGE_MANAGER" ]; then
	export HIGHLEVEL_PACKAGE_MANAGER
fi
if [ ! -z "$LOWLEVEL_PACKAGE_MANAGER" ]; then
	export LOWLEVEL_PACKAGE_MANAGER
fi

if [ -z "$1" ]; then
	usage
fi
command="$1"
shift 1

# compatability code
if [ "$command" = "post-apt" ]; then
	command=post-install
elif [ "$command" = "pre-apt" ]; then
	command=pre-install
fi

if [ ! -d "/etc/etckeeper/$command.d" ]; then
	echo "etckeeper: /etc/etckeeper/$command.d does not exist" >&2
	exit 1
fi

if [ "x$1" = "x-d" ]; then
	if [ -n "$2" ]; then
		cd "$2"
		shift 2
	else
		usage
	fi
else
	cd /etc
fi

lsscripts() {
	perl -e '
		$dir=shift;
		print join "\n", grep { ! -d $_ && -x $_ }
			grep /^\Q$dir\/\E[-a-zA-Z0-9]+$/,
			glob "$dir/*";
	' "$1"
}

for script in $(lsscripts "/etc/etckeeper/$command.d"); do
	"$script" "$@"
done