#!/bin/bash
# * change-description REPO DESCRIPTION
#   Change the project description
#   Example: change-description packages/libretools "Tools for working on Parabola"

set -e

repo=$1; shift

repo="$(sed -r 's,^/*,,' <<<"$repo")"
_repo="$(sed -r -e '/(^|\/)\.\.($|\/)/d' -e "s,[^A-Za-z0-9\./_~-],,g" <<<"$repo")"
test "$repo" = "$_repo" || { printf 'Illegal name: %s\n'   "${repo}"; exit 1; }

if test -d "$repo".git; then
	echo "${*}" > "${repo}".git/description
else
	printf 'Does not exist: %s\n' "${repo}"
	exit 1
fi