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#!/bin/sh
set -e

if [ "$VCS" = git ]; then
	rm -rf .git
	file=.gitignore
elif [ "$VCS" = hg ]; then
	rm -rf .hg
	file=.hgignore
elif [ "$VCS" = bzr ]; then
	rm -rf .bzr
	file=.bzrignore
elif [ "$VCS" = darcs ]; then
	rm -rf _darcs
	file=.darcsignore
fi

managed_by_etckeeper="managed by etckeeper"

if ! grep -q "$managed_by_etckeeper" "$file"; then
	exit 0
else
	realfile="$file"
	if type -p tempfile >/dev/null 2>&1; then
		tempfile="tempfile"
	elif type -p mktemp >/dev/null 2>&1; then
		tempfile="mktemp"
	else
		echo "etckeeper warning: can't find tempfile or mktemp" >&2
		exit 1
	fi
	file=$($tempfile)
	otherentries=
	skipping=
	while read line; do
		if echo "$line" | grep -q "$managed_by_etckeeper"; then
			if [ ! "$skipping" ]; then
				skipping=1
			else
				skipping=
			fi
		elif [ ! "$skipping" ]; then
			echo "$line" >> "$file"
			otherentries=1
		fi
	done <"$realfile"

	if [ "$otherentries" ]; then
		mv -f "$file" "$realfile"
	else
		rm -f "$file"
		rm -f "$realfile"
	fi
fi