A script to help run packages that are built within the Habitat Studio.

.studiorc

# Usage
# 
# run pkg_name          # Run the latest
# run pkg_name HEAD     # Run the latest
# run pkg_name HEAD~1   # Run the second to last
# run pkg_name ~1       # Run the second to last
#
function run() {
  local pkg_name=$1
  local pkg_position=$2

  local found_pkgs=( ./results/$HAB_ORIGIN-$pkg_name-*.hart )
  local pkg_count=${#found_pkgs[@]}

  declare -A indexed_pkgs

  for i in ${!found_pkgs[@]}; do
      current_count=$((pkg_count-1-i))
      if [ $current_count == 0 ] ; then
        indexed_pkgs+=([HEAD]=${found_pkgs[$i]})
      else
        indexed_pkgs+=([HEAD~$current_count]=${found_pkgs[$i]})
        indexed_pkgs+=([~$current_count]=${found_pkgs[$i]})
      fi
  done

  # Run the latest package if no pkg_position has been specified.
  local pkg_to_run=${indexed_pkgs[HEAD]}

  # If there is a pkg_position then find that package. Stop if it cannot.
  if ! [ -z "$pkg_position" ] ; then
    pkg_to_run=${indexed_pkgs[$pkg_position]}

    if [ -z "$pkg_to_run" ] ; then
      echo "Could not find a package at $pkg_position. There are $pkg_count total package(s)."
      return
    fi
  fi

  echo "Running $pkg_to_run"
  hab sup start $pkg_to_run
}