#!/bin/sh
set -e

check_branch(){
    branch="$1"
    shift
    test "$branch" = "staging" && return
    test "$branch" = "gh-pages" && return
    test "$branch" = "HEAD" && return
    test "$branch" = "master" && return
    echo -n " :refs/heads/$branch"
}

run(){
    git fetch origin
    refspec=$(
        git for-each-ref --merged origin/master refs/remotes/origin | while read rev commit ref; do
            check_branch "${ref#refs/remotes/origin/}"
        done
    )
    if test -z "$refspec"; then
      echo No branches to clean
      return
    fi
    set -x
    git push "$@" origin ${refspec}
}

run "$@"