addScripts.sh

#!/bin/sh
packagejson=$(cat package.json)
addtopackagejson=$(echo '{
"author": "Marcel Mokoš <https://github.com/marcelmokos>",
"pre-commit": [
  "lint:pre-commit"
],
"scripts": {
  "test": "jest --env=jsdom",
  "test:coverage": "yarn test -- --coverage",
  "flow": "flow",
  "lint": "eslint \"/**/*.js\" --cache",
  "lint:fix": "yarn run lint -- --fix",
  "lint:pre-commit": "yarn run lint -- --fix"
}}')

echo "$addtopackagejson
$packagejson" | json --deep-merge > package.json