knip-it-test/bin/index.mjs

A CLI tool to identify redundant code with knip

#!/usr/bin/env node

import inquirer from "inquirer";
import { execa } from "execa";
import fs from "fs/promises";

async function main() {
  const defaults = {
    fileExtensions: [
      "src/**/*.tsx",
      "src/**/*.ts",
      "src/**/*.jsx",
      "src/**/*.js",
    ],
    entry: "['src/index.tsx']",
    packageManager: "yarn",
  };
  try {
    const answers = await inquirer.prompt([
      {
        type: "input",
        name: "fileExtensions",
        message: `List of file extensions used: `,
        default: defaults.fileExtensions,
      },
      {
        type: "input",
        name: "entry",
        message: `Specify the entry:`,
        default: defaults.entry,
      },
      {
        type: "input",
        name: "packageManager",
        message: `Package manager of choice (npm/yarn):`,
        default: defaults.packageManager,
      },
    ]);

    console.log("Installing knip");
    try {
      switch (answers.packageManager) {
        case "npm":
          await execa("npm", ["i", "knip"]);
          break;
        case "yarn":
        default:
          await execa("yarn", ["add", "knip"]);
      }
    } catch (e) {
      console.log("package manager switch failed", e);
    }
    await fs.writeFile(
      "knip.js",
      `const config = {entry:${answers.entry}, project:${answers.fileExtensions}}; export default config;`
    );

    console.log("Running the library with the configuration...");
    await execa(answers.packageManager, ["knip"]);
    console.log("Uninstalling knip...");

    switch (answers.packageManager) {
      case "npm":
        await execa("npm", ["uninstall", "knip"]);
        break;
      case "yarn":
        await execa("yarn", ["remove", "knip"]);
      default:
    }
    await fs.rm("knip.js");
    console.log("CLI program finished successfully.");
  } catch (error) {
    console.error("Error:", error);
  }
}

main();