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import { default as alias } from '@rollup/plugin-alias'
import { default as inject } from '@rollup/plugin-inject'
import { nodeResolve } from '@rollup/plugin-node-resolve'
import { default as typescript } from '@rollup/plugin-typescript'
import { default as MagicString } from 'magic-string'
import {
readFile as nodeReadFile,
rename,
rm,
writeFile,
} from 'node:fs/promises'
import { createRequire } from 'node:module'
import path from 'node:path'
import { rollup } from 'rollup'
const readFileCache = Object.create(null)
const require = createRequire(import.meta.url)
const readFile = (/** @type {string} */ id) =>
readFileCache[id] || (readFileCache[id] = nodeReadFile(id, 'utf8'))
const pathToDOMException = path.resolve('src', 'lib', 'DOMException.js')
const pathToEventTargetShim = path.resolve(
'node_modules',
'event-target-shim',
'index.mjs'
)
const pathToStructuredClone = path.resolve(
'node_modules',
'@ungap',
'structured-clone',
'esm',
'index.js'
)
const plugins = [
typescript({
tsconfig: './tsconfig.json',
}),
alias({
entries: [
{ find: '@ungap/structured-clone', replacement: pathToStructuredClone },
{ find: 'event-target-shim', replacement: pathToEventTargetShim },
{
find: 'event-target-shim/dist/event-target-shim.js',
replacement: pathToEventTargetShim,
},
{
find: 'event-target-shim/dist/event-target-shim.umd.js',
replacement: pathToEventTargetShim,
},
{ find: 'node-domexception', replacement: pathToDOMException },
],
}),
nodeResolve({
dedupe: ['net', 'node:net'],
}),
inject({
// import { Promise as P } from 'es6-promise'
// P: [ 'es6-promise', 'Promise' ],
DOMException: [pathToDOMException, 'DOMException'],
Document: ['./Document', 'Document'],
Element: ['./Element', 'Element'],
Event: ['event-target-shim', 'Event'],
EventTarget: ['event-target-shim', 'EventTarget'],
defineEventAttribute: ['event-target-shim', 'defineEventAttribute'],
HTMLElement: ['./Element', 'HTMLElement'],
HTMLImageElement: ['./Element', 'HTMLImageElement'],
HTMLUnknownElement: ['./Element', 'HTMLUnknownElement'],
MediaQueryList: ['./MediaQueryList', 'MediaQueryList'],
Node: ['./Node', 'Node'],
ReadableStream: ['node:stream/web', 'ReadableStream'],
ShadowRoot: ['./Node', 'ShadowRoot'],
Window: ['./Window', 'Window'],
'globalThis.ReadableStream': ['node:stream/web', 'ReadableStream'],
}),
{
async load(id) {
const pathToEsm = id
const pathToMap = `${pathToEsm}.map`
const code = await readFile(pathToEsm, 'utf8')
const indexes = []
const replacements = [
// remove unused imports
[/(^|\n)import\s+[^']+'node:(buffer|fs|path|worker_threads)'/g, ``],
[/const \{ stat \} = fs/g, ``],
// remove unused polyfill utils
[/\nif \(\s*typeof Global[\W\w]+?\n\}/g, ``],
[/\nif \(\s*typeof window[\W\w]+?\n\}/g, ``],
[/\nif \(!globalThis\.ReadableStream\) \{[\W\w]+?\n\}/g, ``],
[/\nif \(typeof SymbolPolyfill[\W\w]+?\n\}/g, ``],
// remove unused polyfills
[/\nconst globals = getGlobals\(\);/g, ``],
[/\nconst queueMicrotask = [\W\w]+?\n\}\)\(\);/g, ``],
[/\nconst NativeDOMException =[^;]+;/g, ``],
[
/\nconst SymbolPolyfill\s*=[^;]+;/g,
'\nconst SymbolPolyfill = Symbol;',
],
[
/\n(const|let) DOMException[^;]*;/g,
`let DOMException$1=DOMException`,
],
[/\nconst DOMException = globalThis.DOMException[\W\w]+?\}\)\(\)/g, ``],
[/\nimport DOMException from 'node-domexception'/g, ``],
// use shared AbortController methods
[/ new DOMException\$1/g, `new DOMException`],
[/ from 'net'/g, `from 'node:net'`],
[/ throw createInvalidStateError/g, `throw new DOMException`],
[/= createAbortController/g, `= new AbortController`],
[/\nconst queueMicrotask = [\W\w]+?\n\}\)\(\)\;/g, ``],
// remove Body.prototype.buffer deprecation notice
[/\nBody\.prototype\.buffer[^\n]+/g, ``],
// remove Body.prototype.data deprecation notice
[/\n data: \{get: deprecate[\W\w]+?\)\}/g, ``],
]
for (const [replacee, replacer] of replacements) {
replacee.index = 0
let replaced = null
while ((replaced = replacee.exec(code)) !== null) {
const leadIndex = replaced.index
const tailIndex = replaced.index + replaced[0].length
indexes.unshift([leadIndex, tailIndex, replacer])
}
}
if (indexes.length) {
const magicString = new MagicString(code)
indexes.sort(([leadOfA], [leadOfB]) => leadOfA - leadOfB)
for (const [leadIndex, tailindex, replacer] of indexes) {
magicString.overwrite(leadIndex, tailindex, replacer)
}
const magicMap = magicString.generateMap({
source: pathToEsm,
file: pathToMap,
includeContent: true,
})
const modifiedEsm = magicString.toString()
const modifiedMap = magicMap.toString()
return { code: modifiedEsm, map: modifiedMap }
}
},
},
]
async function build() {
const configs = [
{
inputOptions: {
input: 'src/polyfill.ts',
plugins: plugins,
external: ['undici'],
onwarn(warning, warn) {
if (warning.code !== 'UNRESOLVED_IMPORT') warn(warning)
},
},
outputOptions: {
inlineDynamicImports: true,
file: 'mod.js',
format: 'esm',
sourcemap: true,
},
},
]
for (const config of configs) {
const bundle = await rollup(config.inputOptions)
// or write the bundle to disk
await bundle.write(config.outputOptions)
// closes the bundle
await bundle.close()
// delete the lib directory
await rm('lib', { force: true, recursive: true })
await rm('exclusions.d.ts', { force: true, recursive: true })
await rm('exclusions.d.ts.map', { force: true, recursive: true })
await rm('inheritance.d.ts', { force: true, recursive: true })
await rm('inheritance.d.ts.map', { force: true, recursive: true })
await rm('polyfill.d.ts.map', { force: true, recursive: true })
await rm('polyfill.js.map', { force: true, recursive: true })
await rm('polyfill.js', { force: true, recursive: true })
await rm('ponyfill.d.ts', { force: true, recursive: true })
await rm('ponyfill.d.ts.map', { force: true, recursive: true })
await rm('ponyfill.js.map', { force: true, recursive: true })
await rm('ponyfill.js', { force: true, recursive: true })
await rename('polyfill.d.ts', 'mod.d.ts')
const modDTS = await readFile('./mod.d.ts')
writeFile(
'mod.d.ts',
'// organize-imports-ignore\n' +
modDTS
.replace('\n//# sourceMappingURL=polyfill.d.ts.map', '')
.replace('ponyfill.js', 'mod.js')
)
writeFile(
'apply.js',
`import { polyfill } from './mod.js'\n\nexport * from './mod.js'\n\npolyfill(globalThis)\n`
)
}
}
build()
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