/
workerImportMetaUrl.ts
172 lines (156 loc) · 5.42 KB
/
workerImportMetaUrl.ts
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import JSON5 from 'json5'
import type { ResolvedConfig } from '../config'
import type { Plugin } from '../plugin'
import { getAssetHash, fileToUrl } from './asset'
import {
blankReplacer,
cleanUrl,
injectQuery,
multilineCommentsRE,
singlelineCommentsRE
} from '../utils'
import path from 'path'
import { bundleWorkerEntry } from './worker'
import { parseRequest } from '../utils'
import { ENV_ENTRY, ENV_PUBLIC_PATH } from '../constants'
import MagicString from 'magic-string'
import type { ViteDevServer } from '..'
type WorkerType = 'classic' | 'module' | 'ignore'
const WORKER_FILE_ID = 'worker_url_file'
function getWorkerType(
code: string,
noCommentsCode: string,
i: number
): WorkerType {
const commaIndex = noCommentsCode.indexOf(',', i)
if (commaIndex === -1) {
return 'classic'
}
const endIndex = noCommentsCode.indexOf(')', i)
// need to find in comment code
let workerOptsString = code.substring(commaIndex + 1, endIndex)
const hasViteIgnore = /\/\*\s*@vite-ignore\s*\*\//.test(workerOptsString)
if (hasViteIgnore) {
return 'ignore'
}
// need to find in no comment code
workerOptsString = noCommentsCode.substring(commaIndex + 1, endIndex)
if (!workerOptsString.trim().length) {
return 'classic'
}
let workerOpts: { type: WorkerType } = { type: 'classic' }
try {
workerOpts = JSON5.parse(workerOptsString)
} catch (e) {
// can't parse by JSON5, so the worker options had unexpect char.
throw new Error(
'Vite is unable to parse the worker options as the value is not static.' +
'To ignore this error, please use /* @vite-ignore */ in the worker options.'
)
}
if (['classic', 'module'].includes(workerOpts.type)) {
return workerOpts.type
}
return 'classic'
}
export function workerImportMetaUrlPlugin(config: ResolvedConfig): Plugin {
const isBuild = config.command === 'build'
let server: ViteDevServer
return {
name: 'vite:worker-import-meta-url',
configureServer(_server) {
server = _server
},
async transform(code, id, options) {
const query = parseRequest(id)
if (query && query[WORKER_FILE_ID] != null && query['type'] != null) {
const workerType = query['type'] as WorkerType
let injectEnv = ''
if (workerType === 'classic') {
injectEnv = `importScripts('${ENV_PUBLIC_PATH}')\n`
} else if (workerType === 'module') {
injectEnv = `import '${ENV_PUBLIC_PATH}'\n`
} else if (workerType === 'ignore') {
if (isBuild) {
injectEnv = ''
} else if (server) {
// dynamic worker type we can't know how import the env
// so we copy /@vite/env code of server transform result into file header
const { moduleGraph } = server
const module = moduleGraph.getModuleById(ENV_ENTRY)
injectEnv = module?.transformResult?.code || ''
}
}
return {
code: injectEnv + code
}
}
if (
(code.includes('new Worker') || code.includes('new ShareWorker')) &&
code.includes('new URL') &&
code.includes(`import.meta.url`)
) {
const importMetaUrlRE =
/\bnew\s+(Worker|SharedWorker)\s*\(\s*(new\s+URL\s*\(\s*('[^']+'|"[^"]+"|`[^`]+`)\s*,\s*import\.meta\.url\s*\))/g
const noCommentsCode = code
.replace(multilineCommentsRE, blankReplacer)
.replace(singlelineCommentsRE, blankReplacer)
let match: RegExpExecArray | null
let s: MagicString | null = null
while ((match = importMetaUrlRE.exec(noCommentsCode))) {
const { 0: allExp, 2: exp, 3: rawUrl, index } = match
const urlIndex = allExp.indexOf(exp) + index
if (options?.ssr) {
this.error(
`\`new URL(url, import.meta.url)\` is not supported in SSR.`,
urlIndex
)
}
// potential dynamic template string
if (rawUrl[0] === '`' && /\$\{/.test(rawUrl)) {
this.error(
`\`new URL(url, import.meta.url)\` is not supported in dynamic template string.`,
urlIndex
)
}
s ||= new MagicString(code)
const workerType = getWorkerType(
code,
noCommentsCode,
index + allExp.length
)
const file = path.resolve(path.dirname(id), rawUrl.slice(1, -1))
let url: string
if (isBuild) {
const content = await bundleWorkerEntry(this, config, file)
const basename = path.parse(cleanUrl(file)).name
const contentHash = getAssetHash(content)
const fileName = path.posix.join(
config.build.assetsDir,
`${basename}.${contentHash}.js`
)
url = `__VITE_ASSET__${this.emitFile({
fileName,
type: 'asset',
source: content
})}__`
} else {
url = await fileToUrl(cleanUrl(file), config, this)
url = injectQuery(url, WORKER_FILE_ID)
url = injectQuery(url, `type=${workerType}`)
}
s.overwrite(urlIndex, urlIndex + exp.length, JSON.stringify(url), {
contentOnly: true
})
}
if (s) {
return {
code: s.toString(),
map: config.build.sourcemap ? s.generateMap({ hires: true }) : null
}
}
return null
}
}
}
}