Set up a new development typescript project

scratch-ts-project.bash

#!/bin/bash

set -euxo pipefail

git init

npm init -y
npm install -D depcheck eslint eslint-config-prettier eslint-plugin-jsdoc eslint-plugin-json eslint-plugin-prettier husky lint-staged prettier
npm pkg set scripts.depcheck='depcheck'
npm pkg set scripts.lint-staged='lint-staged --allow-empty'

npm pkg set scripts.prepare='husky install'
npx husky install
npx husky add .husky/pre-commit 'npm run depcheck'
npx husky add .husky/pre-commit 'npm run lint-staged'
npx husky add .husky/pre-commit 'npm run cover'
cat <<EOF | jq -S | tee .lintstagedrc.json
{
  "*.{json,ts}": "eslint --fix"
}
EOF
cat <<EOF | jq -S | tee .prettierrc.json
{
  "singleQuote": true
}
EOF
cat <<EOF | jq -S | tee .eslintrc.json
{
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended",
    "plugin:prettier/recommended",
    "plugin:jsdoc/recommended",
    "plugin:json/recommended"
  ],
  "parser": "@typescript-eslint/parser",
  "plugins": [
    "@typescript-eslint"
  ],
  "rules": {
    "json/*": ["error", "allowComments"]
  }
}
EOF
npm install -D typescript ts-node @tsconfig/recommended @types/node @typescript-eslint/eslint-plugin @typescript-eslint/parser
cat <<EOF | jq -S | tee tsconfig.json
{
  "extends": "@tsconfig/recommended"
}
EOF

npm install -D chai mocha nyc @istanbuljs/nyc-config-typescript @types/chai @types/mocha
npm pkg set scripts.test='mocha'
npm pkg set scripts.cover='nyc npm test'
cat <<EOF | jq -S | tee .mocharc.json
{
  "exclude": [
    "**/*.d.ts"
  ],
  "extensions": [
    "ts",
    "tsx"
  ],
  "recursive": true,
  "reporter": "min",
  "require": [
    "ts-node/register/transpile-only",
    "source-map-support/register"
  ],
  "spec": [
    "test/**/*.spec.*"
  ],
  "watchFiles": [
    "*.json",
    "src",
    "test"
  ]
}
EOF
cat <<EOF | jq -S | tee .nycrc.json
{
  "branches": 100,
  "check-coverage": true,
  "extends": "@istanbuljs/nyc-config-typescript",
  "extension": [
    ".ts",
    ".tsx"
  ],
  "functions": 100,
  "lines": 100,
  "statements": 10
}
EOF
npx prettier -w .
git add .
mkdir -p test
cat <<EOF | tee test/replace-me.spec.ts
import { expect } from 'chai';
import { describe } from 'mocha';

describe('FIXME: placeholder test', () => {
  it('should be replaced by real tests', () => {
    expect(true).to.be.true;
  });
});
EOF
git commit -m 'configure the application'