Dockerlith Lock Script Prepare NPM Volume Function

lock-script.sh

prepare_npm_volume() {
  #Try to get node_modules lock.
  lock $LOCK_FILE $LOCK_FD

  #Check status of npm libraries now that this container has the lock.
  echo "This container has the lock on the npm libraries."
  npm_library_status=$(check_npm_libraries)

  if [ "$npm_library_status" == "INVALID" ]; then
    install_npm_libraries
  else
    echo "Valid cached npm libraries detected, skipping npm install"
  fi

  #The lock must be explicitly released here, because the process is expected to continue after this script is done.
  unlock $LOCK_FD
}