#!/bin/sh
set -e

unclean() {
	if [ "$VCS" = git ]; then
		[ -d .git ] && ! LANG=C git-status 2>&1 | grep -q "working directory clean"
	elif [ "$VCS" = hg ]; then
		[ -d .hg ] && ! hg status 2>&1 | wc -l | grep -q "^0$"
	fi
}

status() {
	if [ "$VCS" = git ]; then
		git status
	elif [ "$VCS" = hg ]; then
		hg status
	fi
}

commit() {
	message="$1"

	if [ "$VCS" = git ]; then
		git add .
		git commit $GIT_COMMIT_OPTIONS -m "$message"
	elif [ "$VCS" = hg ]; then
		hg addremove .
		hg commit $HG_COMMIT_OPTIONS -m "$message"
	fi
}

if unclean; then
	RET="true"
	if [ -e /usr/share/debconf/confmodule ]; then
		. /usr/share/debconf/confmodule
		db_capb escape
		db_title etckeeper

		db_reset etckeeper/unclean || true
		db_subst etckeeper/unclean VCS "$VCS"
		db_subst etckeeper/unclean STATUS $(status | debconf-escape -e) || true
		db_input critical etckeeper/unclean || true
		db_go || true
		db_get etckeeper/unclean
	fi
	if [ "$RET" = true ]; then
		if ! commit "saving uncommitted changes in /etc prior to $HIGHLEVEL_PACKAGE_MANAGER run"; then
			if [ -e /usr/share/debconf/confmodule ]; then
				db_subst etckeeper/commit_failed VCS "$VCS"
				db_input critical etckeeper/commit_failed || true
				db_go || true
				db_reset etckeeper/commit_failed || true
			else
				echo "error: etckeeper failed to commit changes in /etc using $VCS"
				exit 1
			fi
		fi
	fi
	if [ -e /usr/share/debconf/confmodule ]; then
		db_reset etckeeper/unclean || true
	fi
fi