Bundle your scripts (bys)

Bys is an npm/yarn library to merge your js and ts files into one file.

Installation

Use the npm or yarn package manager to install bys.

# Using npm
npm i @flamesx128/bys -g

# Using yarn
yarn add @flamesx128/bys -g

Usage

Bys needs to know what the main file is, by default it will look in the package.json file, but it can be specified by a bys.config.json file or by the "entry" flag.

Flags

With the flags you can change how the program will work.

• entry

  • This flag specifies which is the main file.
  • Usage: $ bys --entry="main.js"
  • Required flag.

• output-extention

  • This flag specifies the extension that the file created by bys will have.
  • If not specified, defaults to ".js".
  • Usage: $ bys --output-extention=".js"
  • Optional flag.

• output-filename

  • This flag specifies what is the name of the file created by bys.
  • If not added, the default name is "bundle".
  • Usage: $ bys --output-filename="bundle.js"
  • Optional flag.

• output-path

  • This flag specifies the directory where the file created by bys is saved.
  • If not added, the file is placed in the directory where it was called bys.
  • Usage: $ bys --output-path="main.js"
  • Optional flag.

Configuration file

You can create a configuration file for bys called bys.config.js with the following structure:

export interface Config {
  // Main file that read.
  entry?: string,
  output?: {
    // File extension to use when creating.
    extention?: string,
    // Name of the file that will be assigned when it is created.
    filename?: string,
    // Path of the directory where the file created by bys will be saved
    path?: string
  },
  // This method is to transpire the code at the end of joining the files.
  transpiler?(code: string): Promise<string> | string
  // This method is used to transpile the files at the moment they are read.
  transpilers?: {
    execute?(code: string): Promise<string> | string,
    extentions?: RegExp
  }[]
}

Configuration file example

// File: bys.config.js
const { join } = require('path');

module.exports = {
  entry: 'main.js',
  output: {
    extention: ".js",
    filename: 'bundle',
    path: join(__dirname, "dist")
  },
  transpilers: []
}

Bys usage example

Here are some examples of using bys with js and ts.

// File: bys.config.js

module.exports = {
  entry: 'main.js',
  output: {
    extention: ".js",
    filename: 'bundle',
    path: join(__dirname, "dist")
  }
}

// File: sum.js

const sum = (x, y) => x + y;

// @bys-import ./sum.js \\

console.log(sum(2, 2));

// Result after using bys.
// File: dist/bundle.js

const sum = (x, y) => x + y;

console.log(sum(2, 2));

// File: bys.config.js
const { transpile } = require('typescript');
const { join } = require('path');

module.exports = {
  entry: 'main.ts',
  output: {
    extention: ".js",
    filename: 'bundle',
    path: join(__dirname, "out")
  },
  transpiler: (code) => transpile(code, {
    /* Language and Environment */
    target: "es2016",

    /* Modules */
    module: "AMD",
    moduleResolution: "node",

    /* Emit */
    removeComments: true,

    /* Interop Constraints */
    esModuleInterop: true,
    forceConsistentCasingInFileNames: true,

    /* Type Checking */
    strict: true,
    alwaysStrict: true,
  })
}

// File: user.ts

class User {
  private username: string
  public readonly email: string

  constructor(username: string, email: string) {
    this.username = username,
    this.email = email
  }

  public hello(): void {
    console.log("Hello")
  }
}

// File: main.ts

// @bys-import user.ts \\

const user = new User("carlos", "[email protected]");
user.hello();

// Result after using bys.
// File: out/bundle.js

define(["require", "exports"], function (require, exports) {
  "use strict";
  class User {
      constructor(username, email) {
          this.username = username,
              this.email = email;
      }
      hello() {
          console.log("Hello");
      }
  }
  const user = new User("carlos", "[email protected]");
  user.hello();
});

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.

License

MIT