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#!/bin/sh
set -e

# source confmodule to ensure templates are loaded
. /usr/share/debconf/confmodule

#DEBHELPER#

# Move a conffile without triggering a dpkg question
mv_conffile() {
	OLDCONFFILE="$1"
	NEWCONFFILE="$2"

	if [ -e "$OLDCONFFILE" ]; then
		echo "Preserving user changes to $NEWCONFFILE ..."
		mv -f "$NEWCONFFILE" "$NEWCONFFILE".dpkg-new
		mv -f "$OLDCONFFILE" "$NEWCONFFILE"
	fi
}

case "$1" in
configure)
	if dpkg --compare-versions "$2" le "0.7"; then
		if [ -d /etc/etckeeper/pre-apt.d ]; then
			mv_conffile "/etc/etckeeper/pre-apt.d/README" \
				"/etc/etckeeper/pre-install.d/README"
			mv_conffile "/etc/etckeeper/pre-apt.d/50uncommitted-changes" \
				"/etc/etckeeper/pre-install.d/50uncommitted-changes"
			rmdir --ignore-fail-on-non-empty /etc/etckeeper/pre-apt.d
		fi
		if [ -d /etc/etckeeper/post-apt.d ]; then
			mv_conffile "/etc/etckeeper/post-apt.d/README" \
				"/etc/etckeeper/post-install.d/README"
			mv_conffile "/etc/etckeeper/post-apt.d/10git-test" \
				"/etc/etckeeper/post-install.d/10vcs-test"
			mv_conffile "/etc/etckeeper/post-apt.d/30git-add" \
				"/etc/etckeeper/post-install.d/30git-add"
			mv_conffile "/etc/etckeeper/post-apt.d/40git-rm" \
				"/etc/etckeeper/post-install.d/40git-rm"
			mv_conffile "/etc/etckeeper/post-apt.d/50git-commit" \
				"/etc/etckeeper/post-install.d/50vcs-commit"
			rmdir --ignore-fail-on-non-empty /etc/etckeeper/post-apt.d
		fi
		mv_conffile "/etc/etckeeper/init.d/40git-init" \
			"/etc/etckeeper/init.d/40vcs-init"
		mv_conffile "/etc/etckeeper/init.d/50git-ignore" \
			"/etc/etckeeper/init.d/50vcs-ignore"
		mv_conffile "/etc/etckeeper/init.d/50git-perm" \
			"/etc/etckeeper/init.d/50vcs-perm"
		mv_conffile "/etc/etckeeper/init.d/50git-pre-commit-hook" \
			"/etc/etckeeper/init.d/50vcs-pre-commit-hook"
		mv_conffile "/etc/etckeeper/init.d/70git-add" \
			"/etc/etckeeper/init.d/70git-add"
	fi
	if dpkg --compare-versions "$2" le "0.10"; then
        	for c in 10vcs-test 30git-add 30hg-addremove 40git-rm; do
			mv_conffile "/etc/etckeeper/post-install.d/$c" \
				"/etc/etckeeper/commit.d/$c"

		done
	fi
	if dpkg --compare-versions "$2" le "0.13"; then
		mv_conffile "/etc/etckeeper/init.d/10restore-etckeeper" \
			"/etc/etckeeper/init.d/20restore-etckeeper"
		mv_conffile "/etc/etckeeper/init.d/20restore-metadata" \
			"/etc/etckeeper/init.d/10restore-metadata"
	fi
	if dpkg --compare-versions "$2" le "0.28"; then
		for c in commit.d/30darcs-add init.d/60darcs-deleted-symlinks; do
			if [ -e /etc/etckeeper/$c ]; then
				chmod +x /etc/etckeeper/$c
			fi
		done
	fi

	if [ "$2" = "" ]; then
		# Fresh install.
		. /etc/etckeeper/etckeeper.conf || true
		if [ -n "$VCS" ] && [ -x "`which $VCS 2>/dev/null`" ]; then
			etckeeper init || echo "etckeeper init failed; run it by hand" >&2
		else
			echo "etckeeper init not ran as $VCS is not installed" >&2
		fi
	fi

	# prints error and exits nonzero if the ignore file cannot be updated
	etckeeper update-ignore || true
esac