#!/bin/bash

debug=${DEBUG:-}

function copyIfNotDebug {
  if [ -z "$debug" ]; then
    cp -r "$1" "$2"
  else
    echo "$1 -> $2"
  fi
}

function copyVolumes() {
  echo "Copying volumes..."
  local volumes=($(find "$1/volumes" -maxdepth 1 -mindepth 1 -type d))
  for volume in "${volumes[@]}"; do
    local dest="${volume#"$1"/volumes*}"
    copyIfNotDebug "$volume" "$dest"
  done
}

function copyStacks() {
  echo "Copying stacks..."
  local stacks=($(find "$1/stacks" -maxdepth 1 -mindepth 1 -type d))
  for stack in "${stacks[@]}"; do
    local dest="${stack#"$1"/stacks*}"
    copyIfNotDebug "$stack" "$dest"
  done
}

function main() {
  local archive="$1"
  local dir="${archive%*.tar.gz}"

  # unzip the archive.
  tar -xvf "$archive"

  # copy stacks and volumes to their locations.
  copyVolumes "$dir"
  copyStacks "$dir"

  # cleanup
  rm -rf "$dir"
}

main "$@"