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#!/bin/bash
# * change-description
#   Change the project description, needs "description" in the project
#   ssh git@host change-description repo "description"

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