TDD bootstrap for typescript with mocha+chai. use 'curl <raw> | bash -is <folder>'

tdd-bootstrap-ts-mocha-chai.sh

#!/usr/bin/env bash

# start tdd in one command 'curl <link-to-raw> | bash -s <folder>

if [ $# -ge 1 ]
  then
    # jump to folder
    target="$1"
    mkdir -p "$target"
    cd "$target"
fi

# init
npm init -y
npm i -d typescript ts-node mocha chai nyc @types/node @types/mocha @types/chai 

# create tsconfig.json
read -d '' tsconfig << EOF
{
  "compileOnSave": true,
  "compilerOptions": {
    // see https://www.typescriptlang.org/docs/handbook/compiler-options.html
    "target": "es5",
    "lib": [
      "esnext"
    ],
    "module": "commonjs",
    "sourceMap": true,
    "outDir": "./dist/",
    "noEmitOnError": true,
    "strict": true,
    "noImplicitReturns": true,
    "forceConsistentCasingInFileNames": false,
    "downlevelIteration": true,
    "experimentalDecorators": true,
  },
  "include": [
    "src/**/*",
    "test/**/*.ts",
  ],
  "exclude": [
    "node_modules",
    "dist",
  ]
}
EOF
echo "$tsconfig" > tsconfig.json

# create red test
mkdir test
read -d '' first_test << EOF
import {expect} from 'chai'
import 'mocha'

describe('World', () => {
    it('is Red', () => {
        expect('foo').to.equal('bar')
    })
})
EOF
echo "$first_test" > test/test.ts

# point 'npm test' to mocha
npm i -g json
json -I -f package.json -e 'this.scripts.test="mocha -r ts-node/register \"test/**/*.ts\""'
json -I -f package.json -e 'this.scripts["test:watch"]="mocha -r ts-node/register -R min -w --watch-files . \"test/**/*.ts\""'

# init git
curl https://www.toptal.com/developers/gitignore/api/node,intellij+all,eclipse,visualstudiocode,windows,linux,macos --output .gitignore
git init
git add -A

# run test:watch
npm run test:watch

input von Peter: download and add default .gitignore, and run git init