Converted the ckeditor5-dev-ci package to ESM

.eslintrc.js

@@ -13,11 +13,16 @@ module.exports = {
 	ignorePatterns: [
 		'**/dist/*',
 		'**/coverage/**',
-		'**/node_modules/**'
+		'**/node_modules/**',
+
+		// ESLint does not understand `import ... with { ... }`.
+		// See: https://github.com/eslint/eslint/discussions/15305.
+		'packages/ckeditor5-dev-ci/lib/data/index.js'
 	],
 	rules: {
 		'no-console': 'off',
 		'ckeditor5-rules/require-file-extensions-in-imports': 'off',
+		'mocha/no-global-tests': 'off', // TODO: remove when all mocha tests are removed.
 		'ckeditor5-rules/license-header': [ 'error', {
 			headerLines: [
 				'/**',
@@ -29,9 +34,18 @@ module.exports = {
 	},
 	overrides: [
 		{
-			files: [ './packages/ckeditor5-dev-build-tools/tests/**/*' ],
+			files: [
+				// TODO: add packages as they are migrated to ESM.
+				'./packages/ckeditor5-dev-ci/**/*'
+			],
 			rules: {
-				'mocha/no-global-tests': 'off'
+				'mocha/no-global-tests': 'error',
+				'ckeditor5-rules/require-file-extensions-in-imports': [
+					'error',
+					{
+						extensions: [ '.ts', '.js', '.json' ]
+					}
+				]
 			}
 		}
 	]

packages/ckeditor5-dev-ci/bin/circle-disable-auto-cancel-builds.js

@@ -5,9 +5,7 @@
  * For licensing, see LICENSE.md.
  */
 
-'use strict';
-
-const circleUpdateAutoCancelBuilds = require( '../lib/circle-update-auto-cancel-builds' );
+import circleUpdateAutoCancelBuilds from '../lib/circle-update-auto-cancel-builds.js';
 
 /**
  * This script updates CircleCI settings to disable the "Auto-cancel redundant workflows" option.

packages/ckeditor5-dev-ci/bin/circle-enable-auto-cancel-builds.js

@@ -5,9 +5,7 @@
  * For licensing, see LICENSE.md.
  */
 
-'use strict';
-
-const circleUpdateAutoCancelBuilds = require( '../lib/circle-update-auto-cancel-builds' );
+import circleUpdateAutoCancelBuilds from '../lib/circle-update-auto-cancel-builds.js';
 
 /**
  * This script updates CircleCI settings to enable the "Auto-cancel redundant workflows" option.

packages/ckeditor5-dev-ci/bin/circle-workflow-notifier.js

@@ -7,12 +7,9 @@
 
 /* eslint-env node */
 
-'use strict';
-
-const { execSync } = require( 'child_process' );
-const fetch = require( 'node-fetch' );
-const minimist = require( 'minimist' );
-const processJobStatuses = require( '../lib/process-job-statuses' );
+import { execSync } from 'child_process';
+import minimist from 'minimist';
+import processJobStatuses from '../lib/process-job-statuses.js';
 
 // This script allows the creation of a new job within a workflow that will be executed
 // in the end, when all other jobs will be finished or errored.

packages/ckeditor5-dev-ci/bin/is-job-triggered-by-member.js

@@ -5,9 +5,7 @@
  * For licensing, see LICENSE.md.
  */
 
-'use strict';
-
-const isJobTriggeredByMember = require( '../lib/is-job-triggered-by-member' );
+import isJobTriggeredByMember from '../lib/is-job-triggered-by-member.js';
 
 /**
  * This script checks if a user that approved an approval job could do that.

packages/ckeditor5-dev-ci/bin/notify-circle-status.js

@@ -7,9 +7,8 @@
 
 /* eslint-env node */
 
-const fetch = require( 'node-fetch' );
-const slackNotify = require( 'slack-notify' );
-const formatMessage = require( '../lib/format-message' );
+import slackNotify from 'slack-notify';
+import formatMessage from '../lib/format-message.js';
 
 // This script assumes that is being executed on Circle CI.
 // Step it is used on should have set value: `when: on_fail`, since it does not

packages/ckeditor5-dev-ci/bin/notify-travis-status.js

@@ -7,8 +7,8 @@
 
 /* eslint-env node */
 
-const formatMessage = require( '../lib/format-message' );
-const slackNotify = require( 'slack-notify' );
+import formatMessage from '../lib/format-message.js';
+import slackNotify from 'slack-notify';
 
 const ALLOWED_BRANCHES = [
 	'stable',

packages/ckeditor5-dev-ci/bin/trigger-circle-build.js

@@ -5,9 +5,7 @@
  * For licensing, see LICENSE.md.
  */
 
-'use strict';
-
-const triggerCircleBuild = require( '../lib/trigger-circle-build' );
+import triggerCircleBuild from '../lib/trigger-circle-build.js';
 
 /**
  * This script triggers a new CircleCI build.

packages/ckeditor5-dev-ci/lib/circle-update-auto-cancel-builds.js

@@ -3,10 +3,6 @@
  * For licensing, see LICENSE.md.
  */
 
-'use strict';
-
-const fetch = require( 'node-fetch' );
-
 /**
  * @param options
  * @param {String} options.circleToken
@@ -15,7 +11,7 @@ const fetch = require( 'node-fetch' );
  * @param {Boolean} options.newValue
  * @return {Promise.<Boolean>}
  */
-module.exports = async function circleUpdateAutoCancelBuilds( options ) {
+export default async function circleUpdateAutoCancelBuilds( options ) {
 	const {
 		circleToken,
 		githubOrganization,
@@ -40,4 +36,4 @@ module.exports = async function circleUpdateAutoCancelBuilds( options ) {
 
 	return fetch( settingsUpdateUrl, circleRequestOptions )
 		.then( r => r.json() );
-};
+}

packages/ckeditor5-dev-ci/lib/data/index.js

@@ -0,0 +1,10 @@
+/**
+ * @license Copyright (c) 2003-2024, CKSource Holding sp. z o.o. All rights reserved.
+ * For licensing, see LICENSE.md.
+ */
+
+import { default as _members } from './members.json' with { type: 'json' };
+import { default as _bots } from './bots.json' with { type: 'json' };
+
+export const members = _members;
+export const bots = _bots;

packages/ckeditor5-dev-ci/lib/format-message.js

@@ -5,11 +5,7 @@
 
 /* eslint-env node */
 
-'use strict';
-
-const fetch = require( 'node-fetch' );
-const bots = require( './data/bots.json' );
-const members = require( './data/members.json' );
+import { bots, members } from './data/index.js';
 
 const REPOSITORY_REGEXP = /github\.com\/([^/]+)\/([^/]+)/;
 
@@ -29,7 +25,7 @@ const REPOSITORY_REGEXP = /github\.com\/([^/]+)\/([^/]+)/;
  * @param {Number} options.endTime
  * @param {Boolean} options.shouldHideAuthor
  */
-module.exports = async function formatMessage( options ) {
+export default async function formatMessage( options ) {
 	const commitDetails = await getCommitDetails( options.triggeringCommitUrl, options.githubToken );
 	const repoUrl = `https://github.com/${ options.repositoryOwner }/${ options.repositoryName }`;
 
@@ -63,7 +59,7 @@ module.exports = async function formatMessage( options ) {
 			} ]
 		} ]
 	};
-};
+}
 
 /**
  * Returns the additional message that will be added to the notifier post.

packages/ckeditor5-dev-ci/lib/index.js

@@ -3,9 +3,5 @@
  * For licensing, see LICENSE.md.
  */
 
-'use strict';
-
-module.exports = {
-	getJobApprover: require( './utils/get-job-approver' ),
-	members: require( './data/members.json' )
-};
+export { default as getJobApprover } from './utils/get-job-approver.js';
+export { members } from './data/index.js';

packages/ckeditor5-dev-ci/lib/is-job-triggered-by-member.js

@@ -3,10 +3,8 @@
  * For licensing, see LICENSE.md.
  */
 
-'use strict';
-
-const { Octokit } = require( '@octokit/rest' );
-const getJobApprover = require( './utils/get-job-approver' );
+import { Octokit } from '@octokit/rest';
+import getJobApprover from './utils/get-job-approver.js';
 
 /**
  * @param options
@@ -18,7 +16,7 @@ const getJobApprover = require( './utils/get-job-approver' );
  * @param {String} options.githubToken
  * @return {Promise.<Boolean>}
  */
-module.exports = async function isJobTriggeredByMember( options ) {
+export default async function isJobTriggeredByMember( options ) {
 	const {
 		circleToken,
 		circleWorkflowId,
@@ -41,4 +39,4 @@ module.exports = async function isJobTriggeredByMember( options ) {
 	return data
 		.map( ( { login } ) => login )
 		.includes( login );
-};
+}

packages/ckeditor5-dev-ci/lib/process-job-statuses.js

@@ -3,8 +3,6 @@
  * For licensing, see LICENSE.md.
  */
 
-'use strict';
-
 /**
  * The function aims to determine a proper build status for children's jobs based on their parent's statuses.
  *
@@ -19,7 +17,7 @@
  * @param {Array.<WorkflowJob>} jobs
  * @returns {Array.<WorkflowJob>}
  */
-module.exports = function processJobStatuses( jobs ) {
+export default function processJobStatuses( jobs ) {
 	// To avoid modifying the original object, let's clone.
 	const jobsClone = clone( jobs );
 
@@ -55,7 +53,7 @@ module.exports = function processJobStatuses( jobs ) {
 	}
 
 	return jobsClone;
-};
+}
 
 /**
  * @param {WorkflowJob} job

packages/ckeditor5-dev-ci/lib/trigger-circle-build.js

@@ -5,8 +5,6 @@
 
 /* eslint-env node */
 
-const fetch = require( 'node-fetch' );
-
 /**
  * @param options
  * @param {String} options.circleToken
@@ -17,7 +15,7 @@ const fetch = require( 'node-fetch' );
  * @param {String|null} [options.triggerRepositorySlug=null] A repository slug (org/name) that triggers a new build.
  * @return {Promise}
  */
-module.exports = async function triggerCircleBuild( options ) {
+export default async function triggerCircleBuild( options ) {
 	const {
 		circleToken,
 		commit,
@@ -62,4 +60,4 @@ module.exports = async function triggerCircleBuild( options ) {
 				throw new Error( `CI trigger failed: "${ response.message }".` );
 			}
 		} );
-};
+}

packages/ckeditor5-dev-ci/lib/utils/get-job-approver.js

@@ -3,10 +3,6 @@
  * For licensing, see LICENSE.md.
  */
 
-'use strict';
-
-const fetch = require( 'node-fetch' );
-
 /**
  * Returns a promise that resolves to GitHub name of a developer who approved the `jobName` job.
  *
@@ -15,7 +11,7 @@ const fetch = require( 'node-fetch' );
  * @param {String} jobName
  * @returns {Promise.<String>}
  */
-module.exports = async function getJobApprover( circleCiToken, workflowId, jobName ) {
+export default async function getJobApprover( circleCiToken, workflowId, jobName ) {
 	const circleRequestOptions = {
 		method: 'get',
 		headers: {
@@ -35,4 +31,4 @@ module.exports = async function getJobApprover( circleCiToken, workflowId, jobNa
 	const { login } = await fetch( userDetailsUrl, circleRequestOptions ).then( r => r.json() );
 
 	return login;
-};
+}

packages/ckeditor5-dev-ci/package.json

@@ -16,6 +16,7 @@
     "node": ">=18.0.0",
     "npm": ">=5.7.1"
   },
+  "type": "module",
   "main": "lib/index.js",
   "files": [
     "bin",
@@ -35,18 +36,13 @@
   "dependencies": {
     "@octokit/rest": "^19.0.0",
     "minimist": "^1.2.8",
-    "node-fetch": "^2.6.7",
     "slack-notify": "^2.0.6"
   },
   "devDependencies": {
-    "chai": "^4.2.0",
-    "mocha": "^7.1.2",
-    "proxyquire": "^2.1.3",
-    "mockery": "^2.1.0",
-    "sinon": "^9.2.4"
+    "vitest": "^2.0.5"
   },
   "scripts": {
-    "test": "mocha './tests/**/*.js' --timeout 10000",
-    "coverage": "nyc --reporter=lcov --reporter=text-summary yarn run test"
+    "test": "vitest run --config vitest.config.js",
+    "coverage": "vitest run --config vitest.config.js --coverage"
   }
 }