#!/bin/sh

default_extensions() {
  cut -d ' ' -f 2 lib/MANIFEST  | sed -e 's#lib/Foswiki.*##' | xargs -n 1 basename | grep -v core
}

usage(){
  echo "usage: $0 [OPTIONS] [Extension [Extension ...]]"
  echo
  echo "Options:"
  echo
  echo "  --git          checks out the extensions using git instead of svn"
  echo "  --git-rev REV  When checking out with git, start history at revision REV"
  echo "  --default      checks out all the default extensions"
  echo "  --developer    checks out all the developer extensions"
  echo "  --help         displays usage information"
  echo
}

checkout_cmd="svn checkout"
extensions=""

while test $# -gt 0; do
  case $1 in
    --git)
      checkout_cmd="git svn clone"
      ;;
    --git-rev)
      shift
      rev="$1"
      if [ "$checkout_cmd" = "git svn clone" ]; then
        checkout_cmd="$checkout_cmd -r $rev"
      fi
      ;;
    --default)
      extensions="$extensions $(default_extensions)"
      ;;
    --developer)
      extensions="$extensions BuildContrib TestFixturePlugin UnitTestContrib"
      ;;
    --help)
      usage
      exit 0
      ;;
    -*)
      echo "Invalid option: $1"
      usage
      exit 1
      ;;
    *)
      extensions="$extensions $1"
      ;;
  esac
  shift
done

if [ -z "$extensions" ]; then
  echo "You must specify at least one extension to checkout."
  echo "Try the --core option to checkout all core extensions"
  exit 2
fi

for ext in $extensions; do
  echo "Checking out $ext"
  if [ -d "../$ext" ]; then
    echo "W: ../$ext already exists, it seems you already checked it out (not processed)"
  else
    svnroot=$(svn info $0 | grep URL: | sed -e 's#URL: \(.*\)/core/tools/checkout_extensions#\1#')
    (cd .. && $checkout_cmd "$svnroot/$ext")
  fi
done