generate.js

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

const newRuleName = process.argv[2];
if (!newRuleName) {
  console.log('usage: node generate [newRuleName]');
  process.exit(1);
}

console.log('Generating rule', newRuleName);
// Write rule file
fs.writeFileSync(path.join(
    __dirname,
    'packages/eslint-plugin-pf-codemods/lib/rules',
    `${newRuleName}.js`
  ),
  `const { getPackageImports } = require('../helpers');

// https://github.com/patternfly/patternfly-react/pull/YOURNUMBERHERE
module.exports = {
  create: function(context) {
    const imports = getPackageImports(context, '@patternfly/react-core')
      .filter(specifier => specifier.imported.name === 'YOURCOMPONENTNAME');
      
    return imports.length == 0 ? {} : {
      JSXOpeningElement(node) {
        if (imports.map(imp => imp.local.name).includes(node.name.name)) {
          const attribute = node.attributes.find(node => node.name && node.name.name === 'variant');
          if (attribute) {
            context.report({
              node,
              message: 'YOUR_MESSAGE_HERE',
              fix(fixer) {
                return fixer.replaceText(attribute, '');
              }
            });
          }
        }
      }
    };
  }
};
`);
// Write test file
fs.writeFileSync(path.join(
  __dirname,
  'packages/eslint-plugin-pf-codemods/test/rules',
  `${newRuleName}.js`
),
`const ruleTester = require('../ruletester');
const rule = require('../../lib/rules/${newRuleName}');

ruleTester.run("${newRuleName}", rule, {
  valid: [
    {
      code: \`VALID_CODE_HERE\`,
    }
  ],
  invalid: [
    {
      code:   \`import { } from '@patternfly/react-core';\`,
      output: \`import { } from '@patternfly/react-core';\`,
      errors: [{
        message: \`YOUR_MESSAGE_HERE\`,
        type: "JSXOpeningElement",
      }]
    },
  ]
});
`
);

// Update index file
const ruleIndexPath = path.join(__dirname, 'packages/eslint-plugin-pf-codemods/index.js');
const ruleIndex = fs.readFileSync(ruleIndexPath, 'utf8');
fs.writeFileSync(
  ruleIndexPath,
  // (ab)Use fact that `rules` object is at top of file
  ruleIndex.replace("};", `  "${newRuleName}": require('./lib/rules/${newRuleName}'),\n};`)
);