webpack.rb

require "json"

class Webpack < Formula
  desc "Bundler for JavaScript and friends"
  homepage "https://webpack.js.org/"
  url "https://registry.npmjs.org/webpack/-/webpack-5.107.2.tgz"
  sha256 "7dfa3afc1ffb4be54f2d665c480cc18fecba5d5feea7b832cab93da35511edd0"
  license "MIT"
  head "https://github.com/webpack/webpack.git", branch: "main"

  bottle do
    sha256 cellar: :any_skip_relocation, all: "882ab5a780efb37e12189d2ea707eee2a1915b5366a8b33b3788fc725ec60284"
  end

  depends_on "node"

  resource "webpack-cli" do
    url "https://registry.npmjs.org/webpack-cli/-/webpack-cli-7.0.2.tgz"
    sha256 "aff76cea56dd87feb531c2fa0681c1672abd2bf0955d368986c1ad21741cbe82"
  end

  def install
    (buildpath/"node_modules/webpack").install Dir["*"]
    buildpath.install resource("webpack-cli")

    cd buildpath/"node_modules/webpack" do
      system "npm", "install", *std_npm_args(prefix: false), "--force"
    end

    # declare webpack as a bundledDependency of webpack-cli
    pkg_json = JSON.parse(File.read("package.json"))
    pkg_json["dependencies"]["webpack"] = version
    pkg_json["bundleDependencies"] = ["webpack"]
    File.write("package.json", JSON.pretty_generate(pkg_json))

    system "npm", "install", *std_npm_args

    bin.install_symlink libexec.glob("bin/*")
    bin.install_symlink libexec/"bin/webpack-cli" => "webpack"
  end

  test do
    (testpath/"index.js").write <<~JS
      function component() {
        const element = document.createElement('div');
        element.innerHTML = 'Hello webpack';
        return element;
      }

      document.body.appendChild(component());
    JS

    system bin/"webpack", "bundle", "--mode=production", testpath/"index.js"
    assert_match 'const e=document.createElement("div");', (testpath/"dist/main.js").read
  end
end