refactor: migrate to ESM (nodejs#601)

.eslintrc

@@ -12,9 +12,6 @@
     "node": true
   },
   "parserOptions": {
-    "ecmaFeatures": {
-      "globalReturn": true
-    },
-    "sourceType": "script"
+    "sourceType": "module"
   }
 }

bin/get-metadata.js

@@ -0,0 +1,11 @@
+#!/usr/bin/env node
+
+import { fileURLToPath } from 'node:url';
+
+import { runAsync } from '../lib/run.js';
+import { setVerbosityFromEnv } from '../lib/verbosity.js';
+
+setVerbosityFromEnv();
+
+const script = fileURLToPath(new URL('git-node.js', import.meta.url));
+runAsync(process.execPath, [script, 'metadata', ...process.argv.slice(2)]);

bin/git-node.js

@@ -0,0 +1,29 @@
+#!/usr/bin/env node
+
+import { readdirSync } from 'fs';
+
+import yargs from 'yargs';
+import { hideBin } from 'yargs/helpers';
+
+import epilogue from '../components/git/epilogue.js';
+import { setVerbosityFromEnv } from '../lib/verbosity.js';
+
+setVerbosityFromEnv();
+
+const commandFiles = readdirSync(new URL('../components/git', import.meta.url))
+  .filter(file => file !== 'epilogue.js');
+
+function importCommand(commandFile) {
+  return import(new URL(`../components/git/${commandFile}`, import.meta.url));
+}
+
+Promise.all(commandFiles.map(importCommand)).then((commands) => {
+  const args = yargs(hideBin(process.argv));
+  commands.forEach(command => args.command(command));
+  args.command('help', false, () => {}, (yargs) => { yargs.showHelp(); })
+    .demandCommand(1)
+    .strict()
+    .epilogue(epilogue)
+    .help('help')
+    .parse();
+});

bin/ncu-ci → bin/ncu-ci.js

@@ -1,48 +1,47 @@
 #!/usr/bin/env node
 
-'use strict';
+import yargs from 'yargs';
+import clipboardy from 'clipboardy';
 
-const {
+import {
   JobParser,
   parseJobFromURL,
-  CI_TYPES_KEYS: {
-    PR,
-    COMMIT,
-    BENCHMARK,
-    CITGM,
-    CITGM_NOBUILD,
-    DAILY_MASTER
-  }
-} = require('../lib/ci/ci_type_parser');
-const { setVerbosityFromEnv } = require('../lib/verbosity');
-setVerbosityFromEnv();
-
-const { listBuilds } = require('../lib/ci/ci_utils');
-
-const { jobCache } = require('../lib/ci/build-types/job');
-const { PRBuild } = require('../lib/ci/build-types/pr_build');
-const { CommitBuild } = require('../lib/ci/build-types/commit_build');
-const { DailyBuild } = require('../lib/ci/build-types/daily_build');
-const { FailureAggregator } = require('../lib/ci/failure_aggregator');
-const { BenchmarkRun } = require('../lib/ci/build-types/benchmark_run');
-const { HealthBuild } = require('../lib/ci/build-types/health_build');
-const { CITGMBuild } = require('../lib/ci/build-types/citgm_build');
-const {
+  CI_TYPES_KEYS
+} from '../lib/ci/ci_type_parser.js';
+import { setVerbosityFromEnv } from '../lib/verbosity.js';
+import { listBuilds } from '../lib/ci/ci_utils.js';
+import { jobCache } from '../lib/ci/build-types/job.js';
+import { PRBuild } from '../lib/ci/build-types/pr_build.js';
+import { CommitBuild } from '../lib/ci/build-types/commit_build.js';
+import { DailyBuild } from '../lib/ci/build-types/daily_build.js';
+import { FailureAggregator } from '../lib/ci/failure_aggregator.js';
+import { BenchmarkRun } from '../lib/ci/build-types/benchmark_run.js';
+import { HealthBuild } from '../lib/ci/build-types/health_build.js';
+import { CITGMBuild } from '../lib/ci/build-types/citgm_build.js';
+import {
   CITGMComparisonBuild
-} = require('../lib/ci/build-types/citgm_comparison_build');
-
-const {
+} from '../lib/ci/build-types/citgm_comparison_build.js';
+import {
   RunPRJob
-} = require('../lib/ci/run_ci');
-const clipboardy = require('clipboardy');
-const { writeJson, writeFile } = require('../lib/file');
-const { getMergedConfig } = require('../lib/config');
+} from '../lib/ci/run_ci.js';
+import { writeJson, writeFile } from '../lib/file.js';
+import { getMergedConfig } from '../lib/config.js';
+import { runPromise } from '../lib/run.js';
+import auth from '../lib/auth.js';
+import Request from '../lib/request.js';
+import CLI from '../lib/cli.js';
+import { hideBin } from 'yargs/helpers';
+
+setVerbosityFromEnv();
 
-const { runPromise } = require('../lib/run');
-const auth = require('../lib/auth');
-const Request = require('../lib/request');
-const CLI = require('../lib/cli');
-const yargs = require('yargs');
+const {
+  PR,
+  COMMIT,
+  BENCHMARK,
+  CITGM,
+  CITGM_NOBUILD,
+  DAILY_MASTER
+} = CI_TYPES_KEYS;
 
 const commandKeys = [
   'rate',
@@ -53,8 +52,7 @@ const commandKeys = [
   'citgm'
 ];
 
-// eslint-disable-next-line no-unused-vars
-const argv = yargs
+const args = yargs(hideBin(process.argv))
   .command({
     command: 'rate <type>',
     desc: 'Calculate the green rate of a CI job in the last 100 runs',
@@ -223,8 +221,9 @@ const argv = yargs
     }
     return true;
   })
-  .help()
-  .argv;
+  .help();
+
+args.parse();
 
 const commandToType = {
   commit: COMMIT,
@@ -564,7 +563,7 @@ async function main(command, argv) {
       break;
     }
     default:
-      return yargs.showHelp();
+      return args.showHelp();
   }
 
   await commandHandler.initialize();

bin/ncu-config → bin/ncu-config.js

@@ -1,16 +1,16 @@
 #!/usr/bin/env node
 
-'use strict';
+import yargs from 'yargs';
+import { hideBin } from 'yargs/helpers';
 
-const {
+import {
   getConfig, updateConfig, GLOBAL_CONFIG, PROJECT_CONFIG, LOCAL_CONFIG
-} = require('../lib/config');
+} from '../lib/config.js';
+import { setVerbosityFromEnv } from '../lib/verbosity.js';
 
-const { setVerbosityFromEnv } = require('../lib/verbosity');
 setVerbosityFromEnv();
 
-const yargs = require('yargs');
-const argv = yargs
+const args = yargs(hideBin(process.argv))
   .command({
     command: 'set <key> <value>',
     desc: 'Set a config variable',
@@ -58,8 +58,9 @@ const argv = yargs
     describe: 'Use project config (./.ncurc)'
   })
   .conflicts('global', 'project')
-  .help()
-  .argv;
+  .help();
+
+const argv = args.parse();
 
 function getConfigType(argv) {
   if (argv.global) {
@@ -95,5 +96,5 @@ function listHandler(argv) {
 }
 
 if (!['get', 'set', 'list'].includes(argv._[0])) {
-  yargs.showHelp();
+  args.showHelp();
 }

bin/ncu-team → bin/ncu-team.js

@@ -1,33 +1,35 @@
 #!/usr/bin/env node
 
-'use strict';
-const Request = require('../lib/request');
-const auth = require('../lib/auth');
-const { runPromise } = require('../lib/run');
-const CLI = require('../lib/cli');
-const TeamInfo = require('../lib/team_info');
+import yargs from 'yargs';
+import { hideBin } from 'yargs/helpers';
+
+import Request from '../lib/request.js';
+import auth from '../lib/auth.js';
+import { runPromise } from '../lib/run.js';
+import CLI from '../lib/cli.js';
+import TeamInfo from '../lib/team_info.js';
+
+import { setVerbosityFromEnv } from '../lib/verbosity.js';
 
-const { setVerbosityFromEnv } = require('../lib/verbosity');
 setVerbosityFromEnv();
 
-require('yargs') // eslint-disable-line
-  .command({
-    command: 'list <team> [org]',
-    desc: 'Get the list of members in a team',
-    builder: (yargs) => {
-      yargs
-        .positional('team', {
-          describe: 'Name of the team',
-          type: 'string'
-        })
-        .positional('org', {
-          describe: 'Name of the organization',
-          type: 'string',
-          default: 'nodejs'
-        });
-    },
-    handler: handler
-  })
+yargs(hideBin(process.argv)).command({
+  command: 'list <team> [org]',
+  desc: 'Get the list of members in a team',
+  builder: (yargs) => {
+    yargs
+      .positional('team', {
+        describe: 'Name of the team',
+        type: 'string'
+      })
+      .positional('org', {
+        describe: 'Name of the organization',
+        type: 'string',
+        default: 'nodejs'
+      });
+  },
+  handler: handler
+})
   .command({
     command: 'sync <file>',
     desc:
@@ -43,7 +45,7 @@ require('yargs') // eslint-disable-line
   })
   .demandCommand(1, 'must provide a valid command')
   .help()
-  .argv;
+  .parse();
 
 function handler(argv) {
   runPromise(main(argv));

components/git/backport.js

@@ -1,10 +1,10 @@
-'use strict';
+import { parsePRFromURL } from '../../lib/links.js';
+import CLI from '../../lib/cli.js';
+import { runPromise } from '../../lib/run.js';
+import BackportSession from '../../lib/backport_session.js';
 
-const yargs = require('yargs');
-const { parsePRFromURL } = require('../../lib/links');
-const CLI = require('../../lib/cli');
-const { runPromise } = require('../../lib/run');
-const BackportSession = require('../../lib/backport_session');
+export const command = 'backport <identifier>';
+export const describe = 'Backport a PR to a release staging branch.';
 
 const epilogue = `====================== Example =======================
 Demo: https://asciinema.org/a/221244
@@ -23,7 +23,10 @@ $ git node backport 24816 --to 11
 =====================================================
 `;
 
-function builder(yargs) {
+let yargsInstance;
+
+export function builder(yargs) {
+  yargsInstance = yargs;
   return yargs
     .options({
       to: {
@@ -40,7 +43,9 @@ function builder(yargs) {
     .wrap(90);
 }
 
-async function main(config) {
+async function main(argv, parsed) {
+  const merged = (await import('../../lib/config.js')).getMergedConfig();
+  const config = Object.assign({}, argv, parsed, merged);
   const logStream = process.stdout.isTTY ? process.stdout : process.stderr;
   const cli = new CLI(logStream);
   cli.setFigureIndent(0);
@@ -49,26 +54,17 @@ async function main(config) {
   return session.backport();
 }
 
-function handler(argv) {
+export function handler(argv) {
   let parsed = {};
   const prid = Number.parseInt(argv.identifier);
   if (!Number.isNaN(prid)) {
     parsed.prid = prid;
   } else {
     parsed = parsePRFromURL(argv.identifier);
     if (!parsed) {
-      return yargs.showHelp();
+      return yargsInstance.showHelp();
     }
   }
 
-  const config = require('../../lib/config').getMergedConfig();
-  const merged = Object.assign({}, argv, parsed, config);
-  return runPromise(main(merged));
+  return runPromise(main(argv, parsed));
 }
-
-module.exports = {
-  command: 'backport <identifier>',
-  describe: 'Backport a PR to a release staging branch.',
-  builder,
-  handler
-};

components/git/epilogue.js

@@ -1,6 +1,4 @@
-'use strict';
-
-module.exports = `Steps to land a pull request:
+export default `Steps to land a pull request:
 ==============================================================================
 $ cd path/to/node/project