#!/bin/bash

: ${DIALOG=dialog}
: ${SVNBASE=http://devel.egressive.com/egressive/drupal_contrib/modules}

norev=0

usage() {
  cat <<EOT

 Usage: $0 [ -h ] [ -r rev ] [ -R ] module

 Add a module to svn:externals in the current working directory

 -h       - Show this help
 -r rev   - Pin at revision 'rev'.  Default is most recent change.
 -R       - Do not pin at any revision.

EOT
}

while getopts "hRr:" opt
do
  case ${opt} in
    h)
      usage
      exit 0
      ;;
    r)
      revision=${OPTARG}
      ;;
    R)
      norev=1
      ;;
    *)
      usage
      exit 1
      ;;
  esac
done

shift $(( $OPTIND - 1 ))

if [ `basename $PWD` != 'modules' ]
then
  echo "ERR: You must be in a directory named 'modules' to run this script"
  exit 1
fi

module=$1

if [ $# -gt 1 ]
then
  echo "ERR: Too many arguments"
  usage
  exit 1
fi

if [ -z "${module}" ]
then
  usage
  exit 1
fi

set -e

mod_dir=${SVNBASE}/${module}

for branch in `svn list ${mod_dir}`
do
  choices="${choices} ${branch} ${branch}"
done

if [ -z "${choices}" ]
then
  echo "ERR: Unable to find any branches under ${mod_dir}"
  exit 1
fi

tempfile=`tempfile 2>/dev/null` || tempfile=/tmp/test$$
trap "rm -f $tempfile" 0 1 2 5 15

$DIALOG --clear --title "Select Branch" \
        --menu "Please select an appropriate branch for your drupal version\n" 0 0 0 \
          $choices  2> $tempfile

retval=$?

choice=`cat $tempfile`

case $retval in
  0)
    echo "'$choice' chosen."
    ;;
  1)
    echo "Cancel pressed."
    exit
    ;;
  255)
    echo "ESC pressed."
    exit
    ;;
esac

mod_dir="${mod_dir}/${choice}"

if [ -z "${revision}" ]
then
  revision=`svn info ${mod_dir} | awk -F: '/^Last Changed Rev/{print $2}'`
fi

if [ $norev -eq 0 ]
then
  revision_string="-r${revision}"
fi

modline="${module} ${revision_string} ${mod_dir}"

externals=`(svn propget svn:externals . | sed -e "/^${module} /d" ; echo $modline) | sort`
svn propset svn:externals "${externals}" .

echo "Added ${modline} to svn:externals, run 'svn update'"