Quickly initialize an empty node typescript project with prettier and yarn

tsinit.sh

#!/bin/bash
set -e

#####################################
### MODERN 2025 VERSION WITH PNPM ###
#####################################

# Initialize pnpm project
pnpm init

# Add TypeScript and essential dev dependencies
pnpm add -D typescript tsx @types/node prettier eslint @typescript-eslint/parser @typescript-eslint/eslint-plugin

# Initialize TypeScript with a modern config
pnpm tsc --init --target es2022 --strict --esModuleInterop --skipLibCheck --forceConsistentCasingInFileNames --module nodenext --moduleResolution nodenext

# Create .prettierrc
cat > .prettierrc << EOF
{
  "semi": true,
  "trailingComma": "all",
  "singleQuote": true,
  "printWidth": 120,
  "tabWidth": 2
}
EOF

# Create .eslintrc
cat > .eslintrc << EOF
{
  "parser": "@typescript-eslint/parser",
  "plugins": ["@typescript-eslint"],
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended"
  ]
}
EOF

# Add useful scripts to package.json
cat > tmp_package.json << EOF
{
  "scripts": {
    "dev": "tsx watch src/index.ts",
    "start": "tsx src/index.ts",
    "build": "tsc",
    "lint": "eslint . --ext .ts",
    "format": "prettier --write \"src/**/*.ts\""
  }
}
EOF

# Merge the scripts into package.json (requires jq)
if command -v jq >/dev/null 2>&1; then
  jq -s '.[0] * .[1]' package.json tmp_package.json > package.json.tmp && mv package.json.tmp package.json
  rm tmp_package.json
else
  echo "Warning: jq not found. Please manually add the scripts from tmp_package.json to your package.json"
fi

# Create src directory and sample index.ts
mkdir -p src
cat > src/index.ts << EOF
console.log('TypeScript project initialized successfully!');
EOF

# Create .gitignore
cat > .gitignore << EOF
node_modules/
dist/
.DS_Store
*.log
EOF

echo "TypeScript project initialized successfully!"
echo "You can now run:"
echo "  pnpm dev    - to start development with hot reload"
echo "  pnpm start  - to run the project"
echo "  pnpm build  - to build for production"
echo "  pnpm lint   - to run ESLint"
echo "  pnpm format - to format code with Prettier"