Update and build all npm linked modules

pull-modules.sh

pull-modules () {
  BASE_DIR=$(pwd)

  # find symlinks in node_modules
  for MODULE in $(find node_modules -type l -depth 1)
  do
    cd "$MODULE"
    BRANCH=$(git rev-parse --abbrev-ref HEAD)
    echo "Updating $MODULE ($BRANCH)..."

    # Warn if index is not clean
    git diff-index --quiet HEAD
    GIT_STATUS=$?
    if [ $GIT_STATUS != 0  ]; then
      echo Warning: you have uncommitted changes in $MODULE
    fi

    # update code
    OLD_COMMIT=$(git rev-parse HEAD)
    git pull -q
    NEW_COMMIT=$(git rev-parse HEAD)

    # only run install if we pulled an update
    if [ $OLD_COMMIT != $NEW_COMMIT ]
    then
      echo Updated to $NEW_COMMIT.
      npm prune
      # assumes that build is run automatically after install
      npm install
    fi
    # return to project directory
    cd $BASE_DIR
  done
}