build.js

const path = require('path');
const fs = require('fs');
const treeShake = require('@kermanx/tree-shaker').treeShake;
const minify = process.argv.includes('--minify');
const shakeFailPaths = [
	'/request-light/lib/node/main.js',
	'/@vue/compiler-core/dist/compiler-core.cjs.prod.js',
	'/packages/typescript-plugin/lib/requests/componentInfos.js',
	'/volar-service-typescript/lib/plugins/docCommentTemplate.js',
	'/@volar/language-service/lib/features/provideHover.js',
	'/volar-service-typescript/lib/utils/previewer.js',
	'/@babel/parser/lib/index.js',
	'/@vscode/emmet-helper/lib/cjs/emmetHelper.js',
	'/vscode-json-languageservice/lib/esm/services/jsonHover.js',
];

require('esbuild').context({
	entryPoints: {
		'dist/client': './out/nodeClientMain.js',
		'dist/server': './node_modules/@vue/language-server/bin/vue-language-server.js',
		'node_modules/vue-language-core-pack/index': './node_modules/@vue/language-core/index.js',
		'node_modules/vue-typescript-plugin-pack/index': './node_modules/@vue/typescript-plugin/index.js',
	},
	bundle: true,
	metafile: process.argv.includes('--metafile'),
	outdir: '.',
	external: ['vscode'],
	format: 'cjs',
	platform: 'node',
	tsconfig: './tsconfig.json',
	define: { 'process.env.NODE_ENV': '"production"' },
	minify: minify,
	plugins: [
		{
			name: 'umd2esm',
			setup(build) {
				build.onResolve({ filter: /^(vscode-.*-languageservice|vscode-languageserver-types|jsonc-parser)$/ }, args => {
					const pathUmdMay = require.resolve(args.path, { paths: [args.resolveDir] });
					// Call twice the replace is to solve the problem of the path in Windows
					const pathEsm = pathUmdMay.replace('/umd/', '/esm/').replace('\\umd\\', '\\esm\\');
					return { path: pathEsm };
				});
				build.onResolve({ filter: /^vscode-uri$/ }, args => {
					const pathUmdMay = require.resolve(args.path, { paths: [args.resolveDir] });
					// v3
					let pathEsm = pathUmdMay.replace('/umd/index.js', '/esm/index.mjs').replace('\\umd\\index.js', '\\esm\\index.mjs');
					if (pathEsm !== pathUmdMay && fs.existsSync(pathEsm)) {
						return { path: pathEsm };
					}
					// v2
					pathEsm = pathUmdMay.replace('/umd/', '/esm/').replace('\\umd\\', '\\esm\\');
					return { path: pathEsm };
				});
			},
		},
		{
			name: 'resolve-share-module',
			setup(build) {
				build.onResolve({ filter: /^@vue\/language-core$/ }, () => {
					return {
						path: 'vue-language-core-pack',
						external: true,
					};
				});
			},
		},
		{
			name: 'schemas',
			setup(build) {
				build.onEnd(() => {
					if (!fs.existsSync(path.resolve(__dirname, '../dist/schemas'))) {
						fs.mkdirSync(path.resolve(__dirname, '../dist/schemas'));
					}
					fs.cpSync(
						path.resolve(__dirname, '../node_modules/@vue/language-core/schemas/vue-tsconfig.schema.json'),
						path.resolve(__dirname, '../dist/schemas/vue-tsconfig.schema.json'),
					);
				});
			},
		},
		{
			name: 'meta',
			setup(build) {
				build.onEnd((result) => {
					if (result.metafile && result.errors.length === 0) {
						fs.writeFileSync(
							path.resolve(__dirname, '../meta.json'),
							JSON.stringify(result.metafile),
						);
					}
				});
			},
		},
		{
			name: 'tree-shaking',
			setup(build) {
				if (!minify) {
					return;
				}
				build.onLoad({ filter: /\.js/ }, ({ path }) => {
					if (shakeFailPaths.some(name => path.endsWith(name))) {
						return;
					}
					const soruce = fs.readFileSync(path, 'utf-8');
					const { output, diagnostics } = treeShake(soruce, 'recommended', false);
					if (!diagnostics.length) {
						return {
							contents: output,
							loader: 'js',
						}
					}
				});
			},
		},
	],
}).then(async ctx => {
	console.time('build');
	if (process.argv.includes('--watch')) {
		await ctx.watch();
		console.timeEnd('build');
		console.log('watching...');
	} else {
		await ctx.rebuild();
		await ctx.dispose();
		console.timeEnd('build');
	}
});