update-rules.js #1

/**
 * This is a modified file that originally was created by:
 * @author Toru Nagashima
 * @copyright 2017 Toru Nagashima. All rights reserved.
 * See LICENSE file in root directory for full license.
 */

'use strict';

// ------------------------------------------------------------------------------
// Requirements
// ------------------------------------------------------------------------------

const fs = require('fs');
const path = require('path');

// ------------------------------------------------------------------------------
// Main
// ------------------------------------------------------------------------------

const root = path.resolve(__dirname, '../lib/rules');
const readmeFile = path.resolve(__dirname, '../README.md');
const recommendedRulesFile = path.resolve(__dirname, '../lib/recommended-rules.js');
const tablePlaceholder = /<!--RULES_TABLE_START-->[\s\S]*<!--RULES_TABLE_END-->/;
const readmeContent = fs.readFileSync(readmeFile, 'utf8');

const STAR = ':white_check_mark:';
const PEN = ':wrench:';

/* eslint-disable global-require, import/no-dynamic-require */
const rules = fs.readdirSync(root)
  .filter(file => path.extname(file) === '.js')
  .map(file => path.basename(file, '.js'))
  .map(fileName => [
    fileName,
    require(path.join(root, fileName))
  ]);

const categories = rules
  .map(entry => entry[1].meta.docs.category)
  .reduce((arr, category) => {
    if (!arr.includes(category)) {
      arr.push(category);
    }
    return arr;
  }, []);

let rulesTableContent = categories.map(category => `
### ${category}

|    | Rule ID | Description |
|:---|:--------|:------------|
${
  rules
    .filter(([, rule]) => rule.meta.docs.category === category && !rule.meta.deprecated)
    .map((entry) => {
      const name = entry[0];
      const meta = entry[1].meta;
      const mark = `${meta.docs.recommended ? STAR : ''}${meta.fixable ? PEN : ''}`;
      const link = `[${name}](./docs/rules/${name}.md)`;
      const description = meta.docs.description || '(no description)';
      return `| ${mark} | ${link} | ${description} |`;
    })
    .join('\n')
}
`).join('\n');

rulesTableContent += `
### Deprecated

> :warning: We're going to remove deprecated rules in the next major release. Please migrate to successor/new rules.

| Rule ID | Replaced by |
|:--------|:------------|
${
  rules
    .filter(entry => entry[1].meta.deprecated)
    .map((entry) => {
      const name = entry[0];
      const meta = entry[1].meta;
      const link = `[${name}](./docs/rules/${name}.md)`;
      const replacedBy = (meta.docs.replacedBy || []).map(id => `[${id}](./docs/rules/${id}.md)`).join(', ') || '(no replacement)';
      return `| ${link} | ${replacedBy} |`;
    })
    .join('\n')
}
`;

const recommendedRules = rules.reduce((obj, entry) => {
  const name = `ember/${entry[0]}`;
  const recommended = entry[1].meta.docs.recommended;
  const status = recommended ? 'error' : 'off';
  /* eslint-disable no-param-reassign */
  obj[name] = status;
  return obj;
}, {});

const recommendedRulesContent = `/*
 * IMPORTANT!
 * This file has been automatically generated.
 * In order to update its content based on rules'
 * definitions, execute "npm run update"
 */
module.exports = ${JSON.stringify(recommendedRules, null, 2)}`;

fs.writeFileSync(
  readmeFile,
  readmeContent.replace(
    tablePlaceholder,
    `<!--RULES_TABLE_START-->\n${rulesTableContent}\n<!--RULES_TABLE_END-->`
  )
);

fs.writeFileSync(
  recommendedRulesFile,
  recommendedRulesContent
);