check-publish-version

#!/bin/bash

# This script confirms that the version we have now doesn't already exist in npm

GREEN='\033[0;32m'
RED='\033[0;31m'
CYAN='\033[0;36m'
NC='\033[0m'

# Version key/value should be on its own line
PACKAGE_VERSION=$(cat package.json \
  | grep version \
  | head -1 \
  | awk -F: '{ print $2 }' \
  | sed 's/[",]//g' \
  | tr -d '[[:space:]]')

PACKAGE_NAME=$(cat package.json \
  | grep name \
  | head -1 \
  | awk -F: '{ print $2 }' \
  | sed 's/[",]//g' \
  | tr -d '[[:space:]]')

PACKAGE_MANIFEST=`npm view $PACKAGE_NAME@$PACKAGE_VERSION`

echo -e "${CYAN}Name:${NC}"
echo $PACKAGE_NAME

echo -e "${CYAN}Version:${NC}"
echo $PACKAGE_VERSION

echo -e "${CYAN}Manifest:${NC}"
echo $PACKAGE_MANIFEST

if [[ $PACKAGE_MANIFEST == "undefined" || -z $PACKAGE_MANIFEST ]];
then
    echo -e "${GREEN}Great! 👍  npm package $PACKAGE_NAME@$PACKAGE_VERSION does not exist yet...${NC}"
else
    echo -e "${RED}Boo! 👻  $PACKAGE_NAME@$PACKAGE_VERSION already exists in npm..."
    echo -e "See https://www.npmjs.com/package/$PACKAGE_NAME for details${NC}"
    exit 1
fi