ybiq/lib/init.js

const path = require("path");
const { EOL } = require("os");
const { promisify } = require("util");
const fs = require("fs");
const originalPackage = require("../package.json");

const copy = promisify(fs.copyFile);
const write = promisify(fs.writeFile);
const read = promisify(fs.readFile);

const packagePath = (...pathElements) => path.join(...[__dirname, "..", ...pathElements]);

// eslint-disable-next-line max-lines-per-function
const initCommand = (baseDir, logger) => {
  const currentPath = (...pathElems) => path.join(...[baseDir, ...pathElems]);

  const readFile = fileName => read(currentPath(fileName), "utf8");

  const copyFile = async (src, dest) => {
    await copy(src, dest);
    logger(`${dest} was updated.`);
  };

  const writeFile = async (fileName, fileContent) => {
    const file = currentPath(fileName);
    await write(file, `${fileContent}\n`);
    logger(`${file} was updated.`);
  };

  return {
    // eslint-disable-next-line max-statements
    async updatePackageFile() {
      const packageInfo = JSON.parse(await readFile("package.json"));

      // update 'scripts'
      if (!("scripts" in packageInfo)) {
        packageInfo.scripts = {};
      }
      const { scripts } = packageInfo;
      if (!("test" in scripts)) {
        scripts.test = "test";
      }
      scripts["test:watch"] = `${scripts.test} --watch`;
      scripts["test:coverage"] = 'echo "unsupported." && exit 1';
      Object.keys(originalPackage.scripts)
        .filter(key => !(key === "test" || key.startsWith("test:")))
        .forEach(key => {
          scripts[key] = originalPackage.scripts[key];
        });

      // update other keys
      const keys = ["husky", "lint-staged", "standard-version", "prettier", "remarkConfig"];
      keys.forEach(key => {
        if (!(key in packageInfo)) {
          packageInfo[key] = {};
        }
        Object.assign(packageInfo[key], originalPackage[key]);
      });
      packageInfo.commitlint = {
        extends: ["@commitlint/config-conventional"],
      };
      packageInfo.eslintConfig = {
        extends: ["ybiquitous"],
      };

      await writeFile("package.json", JSON.stringify(packageInfo, null, 2));
    },

    async writePackageFile(name) {
      await copyFile(packagePath(name), currentPath(name));
    },
  };
};

const defaultLogger = msg => process.stdout.write(`${msg}${EOL}`);

module.exports = async function init({ cwd = process.cwd(), logger = defaultLogger } = {}) {
  const cmd = initCommand(cwd, logger);
  await cmd.updatePackageFile();
  await cmd.writePackageFile(".editorconfig");
  await cmd.writePackageFile(".remarkignore");
};

module.exports.desc = `Setup npm project:
- Update 'package.json'
- Create '.editorconfig'`;