Flatten Dev Deps

Flatten npm devDependencies by pruning them and reinstalling.

Install

npm i -g flatten-dev-deps

Usage

cd PROJECT_ROOT
flatten-dev-deps

This runs the following commands on your npm package:

rm -rf node_modules
npm install
rm package-lock.json  // or npm-shrinkwrap.json, whichever exists
sed -i '' 's/devDependencies/xdevDependencies/' package.json
npm prune
sed -i '' 's/xdevDependencies/devDependencies/' package.json
{ forEach devDependencies do npm install --save-dev dependency }
npm shrinkwrap --dev

Configuration

Create flatten-dev-deps.config.js in the root of your project:

module.exports = {
  quiet: false,  // default

  modifyPackageJson: false,  // default - whether to pass '--save-dev' to 'npm install <devDeps>'

  preFlatten: ({depVersionMap, exec, fs}) => {
    // Runs before re-installing each dev dependency, can modify which dependencies get installed at
    // which version.
    delete depVersionMap['npm-shrinkwrap']  // skip dep
    Object.keys(depVersionMap, (depName) => {
      let version = ''  // use latest minor version
      if (depName === 'eslint') version = '4.9.0'
      if (depName === 'react') version = '~15.6.2'
      depVersionMap[depName] = version
    })
  },

  preShrinkwrap: ({depVersionMap, exec, fs}) => {
    // Runs before 'npm shrinkwrap --dev'
    exec('rm -rf node_modules/fsevents')
  })
}

Development

npm install
npm start
node dist/index.js