torus-scripts

Torus scripts provide you a convenient way to build, release & create a dev server for building ts libraries. It offers a modern build setup with no configuration

The CLI Service is built on top of rollup, webpack and webpack-dev-server. It contains:

• The core service that loads other CLI Plugins;
• An internal webpack and rollup config that is optimized for most apps;
• The torus-scripts binary inside the project, which comes with the basic start, build and release commands.

If you are familiar with create-react-app, @toruslabs/torus-scripts is roughly the equivalent of react-scripts, although the feature set is different.

Installation

To install the package, use one of the following commands

npm install --save-dev @toruslabs/torus-scripts
# OR
yarn add -D @toruslabs/torus-scripts

You can check if you have the right version using

npx torus-scripts --version

Usage

You can create scripts inside package.json as follows

{
  "scripts": {
    "start": "torus-scripts start",
    "build": "torus-scripts build"
  }
}

You can invoke these scripts using either npm or Yarn:

npm run build
# OR
yarn build

If you have npx available (should be bundled with an up-to-date version of npm), you can also invoke the binary directly with:

npx torus-scripts build

torus.config.js

torus.config.js is an optional config file that will be automatically loaded by torus-scripts service if it's present in your project root (next to package.json).

The following options are supported

interface IOptions {
  name: string; // Name of bundles in dist folder. Default: name in package.json with casing changes
  esm: boolean; // Whether to generate an esm build. Default: true
  cjs: boolean; // Whether to generate a cjs build. Default: true
  umd: boolean; // Whether to generate an umd build. Default: true
  analyzerMode: "disabled" | "static" | "server" | "json"; // Whether to analyze the umd build. Internally uses webpack-bundle-analyzer. Default: "disabled". Refer to full options here: https://github.com/webpack-contrib/webpack-bundle-analyzer
  browserslistrc: string | string[]; // The browserlist to target. Default: ["> 0.25%", "not dead", "not ie 11"]. Full list: https://github.com/browserslist/browserslist
  // This option allows you to skip polyfilling node deps by default. You can set it to true or a specific path to
  // polyfill correctly. This change has been done to prevent unnecessary polyfilling of node deps in browser builds
  polyfillNodeDeps: {
    http: boolean | string;
    https: boolean | string;
    os: boolean | string;
    crypto: boolean | string;
    assert: boolean | string;
    stream: boolean | string;
    url: boolean | string;
    zlib: boolean | string;
  };
}

Config precedence

browserslist The order of preference for browserslist config is as follows:

1. .browserslistrc file at package root
2. browserslistrc key in torus.config.js
3. browserslist.production key in package.json
4. browserslist key in package.json
5. Default

typescript The tsconfig is generated as follows:

1. tsconfig.build.json file at package root
2. Default

Both 1 & 2 are merged using lodash.mergewith and the generated config is used. So, it's okay to specify partial config in tsconfig.build.json

babel The babel config is generated as follows:

1. babel.config.js file at package root
2. Default

Both 1 & 2 are merged using babel-merge and the generated config is used. So, it's okay to specify partial config in babel.config.js

rollup The rollup config is generated as follows:

1. rollup.config.js file at package root
2. Default

Both 1 & 2 are merged using lodash.mergewith and the generated config is used. So, it's okay to specify partial config in rollup.config.js you can also specify newer build types in this case using outputs

eg:

To add other plugins

import replace from "@rollup/plugin-replace";

// This adds `replace` plugin to the existing plugins used by torus-scripts
export default {
  plugins: [
    replace({
      "process.env.INFURA_PROJECT_ID": `"${process.env.INFURA_PROJECT_ID}"`,
      preventAssignment: true,
    }),
  ],
};

webpack The webpack config is generated as follows:

1. webpack.config.js file at package root
2. Default

Both 1 & 2 are merged using lodash.mergewith and the generated config is used. So, it's okay to specify partial config in webpack.config.js you can also specify newer build types in this case by adding a new key in the exports

eg:

To create a new build type

const pkg = require("./package.json");

const pkgName = "fetchNodeDetails";

// Adding this creates a new build type in the dist/ folder
exports.nodeConfig = {
  optimization: {
    minimize: false,
  },
  output: {
    filename: `${pkgName}-node.js`,
    libraryTarget: "commonjs2",
  },
  externals: [...Object.keys(pkg.dependencies), /^(@babel\/runtime)/i],
  target: "node",
};

To add plugins or other config to all build types

const path = require("path");
const { EnvironmentPlugin } = require("webpack");

exports.baseConfig = {
  resolve: {
    alias: {
      "bn.js": path.resolve(__dirname, "node_modules/bn.js"),
      lodash: path.resolve(__dirname, "node_modules/lodash"),
      "js-sha3": path.resolve(__dirname, "node_modules/js-sha3"),
    },
  },
  plugins: [new EnvironmentPlugin(["INFURA_PROJECT_ID"])],
};

torus-scripts build

Usage: torus-scripts build [options]
Use e.g. "torus-scripts build" directly".
Options:
  -h --help              Print this help
  -n --name              Name of the project

torus-scripts build produces a production-ready bundle in dist/ directory

The build is produced in the following formats depending on the options specified in torus.config.js

• esm - Built using rollup. (partial rollup config can be specified in rollup.config.js at project root)
• cjs - Built using webpack. (partial webpack config can be specified in webpack.config.js at project root)
• umd - Built using webpack. (partial webpack config can be specified in webpack.config.js at project root)

torus-scripts start

Usage: torus-scripts start [options]
Use e.g. "torus-scripts start" directly".
Options:
  -h --help              Print this help
  -n --name              Name of the project

torus-scripts start command starts a dev server (based on rollup & webpack-dev-server) that comes with HMR (Hot-Module-Replacement) working out of the box.

The dev server build is produced in the following formats depending on the options specified in torus.config.js

• esm - Built using rollup. (partial rollup config can be specified in rollup.config.js at project root)
• cjs - Built using webpack. (partial webpack config can be specified in webpack.config.js at project root)
• umd - Built using webpack. (partial webpack config can be specified in webpack.config.js at project root)

you can use npm folder links to install this to any other project and watch it live updated as you change code in your torus-scripts project

torus-scripts release

Usage: torus-scripts release [options]
Use e.g. "torus-scripts release" directly".

torus-scripts release command internally uses release-it for release management All options from release-it are supported by default

you're recommended to add prepack command to build before calling release

{
  "scripts": {
    "build": "torus-scripts build",
    "prepack": "npm run build",
    "release": "torus-scripts release"
  }
}

Migration Notes

• babel.config files must be extending babel.config.js and import the default config from @toruslabs/config
• tsconfig files must be extending tsconfig.default.json and import the default config from @toruslabs/config
• Add include (["src", "test"]), outDir, declarationDir in imported files of tsconfig.json
• If repo also includes tests, add tsconfig.build.json and in that, include must contain src only.
• Start by default doesn't build umd anymore. To build umd, setumd to true in torus.config.js