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feat: dynamic chunk importer
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packages/nitro/src/dynamic.ts
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44
packages/nitro/src/dynamic.ts
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@ -0,0 +1,44 @@
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import { join } from 'path'
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import globby from 'globby'
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export async function createDynamicImporter (cwd: string) {
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const assets = await globby('**/*.js', { cwd, absolute: false })
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const chunkInfo = {}
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for (const asset of assets) {
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const { id, ids, modules } = require(join(cwd, asset))
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if ((id || ids) && modules) {
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chunkInfo[asset] = { id, ids, modules: Object.keys(modules) }
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}
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}
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return (syncImport, asyncImport) => genRequireDynamic(chunkInfo, syncImport, asyncImport)
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}
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export function genRequireDynamic (chunkInfo, syncImport, asyncImport) {
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return `\nconst _dynamic_chunks = ${JSON.stringify(chunkInfo, null, 2)};
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function requireDynamic (chunkId) {
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const chunk = _dynamic_chunks[chunkId]
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if (!chunk) {
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return ${syncImport}
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}
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const promise = ${asyncImport}
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if (Array.isArray(chunk.modules)) {
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const modules = {}
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for (const id of chunk.modules) {
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modules[id] = function (module, _exports, _require) {
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module.exports = promise.then(chunk => {
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const asyncModule = { exports: {}, require: _require }
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chunk.modules[id](asyncModule, asyncModule.exports, asyncModule.require)
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return asyncModule.exports
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})
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}
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}
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chunk.modules = modules
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}
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return chunk
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};`
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}
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@ -9,6 +9,7 @@ import gzipSize from 'gzip-size'
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import chalk from 'chalk'
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import { getRollupConfig } from './rollup.config'
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import { tryImport, hl, prettyPath } from './utils'
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import { createDynamicImporter } from './dynamic'
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async function main () {
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const rootDir = resolve(process.cwd(), process.argv[2] || '.')
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@ -19,6 +20,9 @@ async function main () {
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buildDir: '',
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targets: [],
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nuxt: 2,
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dynamicImporter: undefined,
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importSync: "require('../server/' + chunkId)",
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importAsync: "Promise.resolve(require('../server/' + chunkId))",
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target: process.argv[3] && process.argv[3][0] !== '-' ? process.argv[3] : null,
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minify: process.argv.includes('--minify') ? true : null,
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analyze: process.argv.includes('--analyze') ? true : null,
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@ -44,7 +48,13 @@ async function main () {
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// eslint-disable-next-line no-template-curly-in-string
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const htmlTemplateCompiled = `export default (params) => \`${htmlTemplateContents.replace(/{{ (\w+) }}/g, '${params.$1}')}\``
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await writeFile(htmlTemplateFileJS, htmlTemplateCompiled)
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consola.info('Generated', (prettyPath(htmlTemplateFileJS)))
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consola.info('Generated', prettyPath(htmlTemplateFileJS))
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// Collect dynamic chunks
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if (!config.dynamicImporter) {
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consola.info('Collecting dynamic chunks...')
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config.dynamicImporter = await createDynamicImporter(resolve(config.buildDir, 'dist/server'))
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}
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// Bundle for each target
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for (let target of config.targets) {
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@ -53,6 +53,12 @@ export const getRollupConfig = (config) => {
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plugins: []
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}
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if (config.logStartup) {
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options.output.intro += 'global._startTime = process.hrtime();'
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// eslint-disable-next-line no-template-curly-in-string
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options.output.outro += 'global._endTime = process.hrtime(global._startTime); global._coldstart = ((_endTime[0] * 1e9) + _endTime[1]) / 1e6; console.log(`λ Cold start took: ${global._coldstart}ms`);'
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}
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// https://github.com/rollup/plugins/tree/master/packages/replace
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options.plugins.push(replace({
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values: {
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@ -60,15 +66,13 @@ export const getRollupConfig = (config) => {
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}
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}))
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// Preserve dynamic require
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// https://github.com/rollup/plugins/tree/master/packages/replace
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options.output.intro += 'const requireDynamic = require;'
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options.plugins.push(replace({
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values: {
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'require("./" +': 'requireDynamic("../server/" +'
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},
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delimiters: ['', '']
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}))
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// Dynamic Importer
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if (config.dynamicImporter) {
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options.output.intro += config.dynamicImporter(config.importSync, config.importAsync)
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} else {
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options.output.intro += 'const requireDynamic = require;'
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}
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options.plugins.push(replace({ values: { 'require("./" +': 'requireDynamic(' }, delimiters: ['', ''] }))
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// https://github.com/rollup/plugins/tree/master/packages/alias
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options.plugins.push(alias({
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@ -109,12 +113,6 @@ export const getRollupConfig = (config) => {
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// https://github.com/rollup/plugins/tree/master/packages/json
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options.plugins.push(json())
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if (config.logStartup) {
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options.output.intro += 'global._startTime = process.hrtime();'
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// eslint-disable-next-line no-template-curly-in-string
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options.output.outro += 'global._endTime = process.hrtime(global._startTime); global._coldstart = ((_endTime[0] * 1e9) + _endTime[1]) / 1e6; console.log(`λ Cold start took: ${global._coldstart}ms`);'
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}
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if (config.analyze) {
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// https://github.com/doesdev/rollup-plugin-analyzer
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options.plugins.push(analyze())
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@ -1,10 +1,12 @@
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import { relative } from 'path'
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import jiti from 'jiti'
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const pwd = process.cwd()
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export const hl = str => '`' + str + '`'
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export const prettyPath = (p, highlight = true) => {
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p = relative(process.cwd(), p)
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p = relative(pwd, p)
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return highlight ? hl(p) : p
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}
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