Build: migrate most grunt tasks off of grunt

Updated tasks include:

- lint
- npmcopy
- build, minify, and process for distribution.
- new custom build command using yargs
- compare size of minified/gzip built files
- pretest scripts, including qunit-fixture, babel transpilation, and npmcopy
- node smoke tests
- promises aplus tests
- new watch task using `rollup.watch` directly

Also:

- upgraded husky and added the new lint command
- updated lint config to use new "flat" config format. See https://eslint.org/docs/latest/use/configure/configuration-files-new
- Temporarily disabled one lint rule until flat config is supported by eslint-plugin-import. See https://github.com/import-js/eslint-plugin-import/issues/2556
- committed package-lock.json
- updated all test scripts to use the new build
- added an express test server that uses middleware-mockserver (this can be used to run tests without karma)
- build-all-variants is now build:all

Close gh-5318

1 files changed, 42 insertions, 0 deletions

diff --git a/build/tasks/npmcopy.js b/build/tasks/npmcopy.js
new file mode 100644
index 000000000..c57acc2e7
--- /dev/null
+++ b/build/tasks/npmcopy.js
@@ -0,0 +1,42 @@
+"use strict";
+
+const fs = require( "fs" );
+const path = require( "path" );
+
+const projectDir = path.resolve( __dirname, "..", ".." );
+
+const files = {
+	"bootstrap/bootstrap.css": "bootstrap/dist/css/bootstrap.css",
+	"bootstrap/bootstrap.min.css": "bootstrap/dist/css/bootstrap.min.css",
+	"bootstrap/bootstrap.min.css.map": "bootstrap/dist/css/bootstrap.min.css.map",
+
+	"core-js-bundle/core-js-bundle.js": "core-js-bundle/minified.js",
+	"core-js-bundle/LICENSE": "core-js-bundle/LICENSE",
+
+	"npo/npo.js": "native-promise-only/lib/npo.src.js",
+
+	"qunit/qunit.js": "qunit/qunit/qunit.js",
+	"qunit/qunit.css": "qunit/qunit/qunit.css",
+	"qunit/LICENSE.txt": "qunit/LICENSE.txt",
+
+	"requirejs/require.js": "requirejs/require.js",
+
+	"sinon/sinon.js": "sinon/pkg/sinon.js",
+	"sinon/LICENSE.txt": "sinon/LICENSE"
+};
+
+async function npmcopy() {
+	await fs.promises.mkdir( path.resolve( projectDir, "external" ), {
+		recursive: true
+	} );
+	for ( const [ dest, source ] of Object.entries( files ) ) {
+		const from = path.resolve( projectDir, "node_modules", source );
+		const to = path.resolve( projectDir, "external", dest );
+		const toDir = path.dirname( to );
+		await fs.promises.mkdir( toDir, { recursive: true } );
+		await fs.promises.copyFile( from, to );
+		console.log( `${source} → ${dest}` );
+	}
+}
+
+npmcopy();