get-npm-install

#!/usr/bin/env bash

if [ $# -le 1 ]
then
  echo "Usage: get-npm-install \$PACKAGE_NAME \$PACKAGE_VERSION"
  exit 1
fi

PKG_NAME=$1
PKG_VERSION=$2
TARBALL_URL="$(npm view $PKG_NAME@$PKG_VERSION dist.tarball)"
TEMP_FILE=$(mktemp --quiet /tmp/XXXXXXXX)

# download npm tarball to tmp file
wget --quiet $TARBALL_URL -O $TEMP_FILE

# get sha256 hash
# sha256sum output format is $HASH $FILENAME, just get the HASH here
HASH=$(sha256sum $TEMP_FILE | cut -d " " -f 1)

# cleanup
rm $TEMP_FILE

echo "npm_install("
echo "  name = '${PKG_NAME}',"
echo "  version = '${PKG_VERSION}',"
echo "  sha256 = '${HASH}',"
echo ")"