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#!/bin/bash
# * change-default-branch REPO BRANCH
#   Change the default branch (it starts out as 'master')
#   Example: change-default-branch packages/libretools master

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 "$repo".git; then
	echo "ref: refs/heads/${*}" > "${repo}".git/HEAD
	echo 'This make take some time to be reflected in the web interface.  LOL caching.' 
else
	printf 'Does not exist: %s\n' "${repo}"
	exit 1
fi