NPM

The node package manager npm is a widely used tool to manage JavaScript dependencies. In order to make the project setup easier for everybody, we recommend to follow the convention of typical scripts like build, watch and test in the package.json file.

You can find more info about this convention on blog posts like this https://www.keithcirkel.co.uk/how-to-use-npm-as-a-build-tool/.

npm build

Once npm install (npm i for short) has been run to install all dependencies specified on package.json, one typically has to build the project. Building can happen with tools like Webpack, Grunt or similar. To unify the build command across Nextcloud apps, just add the build command(s) as build script to your.

For apps that use webpack, this might look like this:

{
  "name": "myapp",
  "scripts": {
    "build": "NODE_ENV=production webpack --progress --hide-modules --config webpack.prod.js"
  },
  "devDependencies": {
    "webpack": "^4.26.1",
    "webpack-cli": "^3.1.2",
  }
}

You can then run npm build in your app’s root directory to invoke the build process.

See the npm-build docs for more info.

npm run dev, npm run watch

Since building the release version of JavaScript scripts can be slow, apps often have a dedicated build step for development that builds faster and enables debug output. Additionally, it can instructs the bundler to listen to file changes and (incrementally) rebuild the project.

This command should be added to package.json as dev and watch script:

{
  "name": "myapp",
  "scripts": {
    "build": "NODE_ENV=production webpack --progress --hide-modules --config webpack.prod.js",
    "dev": "NODE_ENV=development webpack --progress --config webpack.dev.js",
    "watch": "NODE_ENV=development webpack --progress --watch --config webpack.dev.js"
  },
  "devDependencies": {
    "webpack": "^4.26.1",
    "webpack-cli": "^3.1.2",
  }
}

The development build is invoked with npm run dev or if you want to leave the process running and update on every change made to the source files, npm run watch.

npm test

Npm will run the test script when npm test is run, hence you might want to specify the test command(s) like this:

{
  "scripts": {
    "test": "mocha-webpack --webpack-config webpack.test.js --require src/tests/setup.js \"src/tests/**/*.spec.js\""
  }
}

More info about this command can be found in the npm-test documentation.

npm run lint (optional)

Nextcloud apps that use linting tools for consistent code formatting typically add a lint script to their package.json:

{
  "scripts": {
    "lint": "eslint --ext .js,.vue src"
  }
}

If style linting is a separate script, stylelint shall be used as conventional script name:

{
  "scripts": {
    "stylelint": "stylelint src"
  }
}