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import type { Options as SWCOptions } from '@swc/core'
import Module from 'node:module'
import { readFileSync } from 'node:fs'
import { dirname } from 'node:path'
const oldJSHook = require.extensions['.js']
const extensions = ['.ts', '.cts', '.mts', '.cjs', '.mjs']
export function registerHook(swcOptions: SWCOptions) {
// lazy require swc since it loads React before even setting NODE_ENV
// resulting loading Development React on Production
const { transformSync } = require('../swc') as typeof import('../swc')
require.extensions['.js'] = function (mod: any, oldFilename) {
try {
return oldJSHook(mod, oldFilename)
} catch (error) {
if ((error as NodeJS.ErrnoException).code !== 'ERR_REQUIRE_ESM') {
throw error
}
// calling oldJSHook throws ERR_REQUIRE_ESM, so run _compile manually
// TODO: investigate if we can remove readFileSync
const content = readFileSync(oldFilename, 'utf8')
const { code } = transformSync(content, swcOptions)
mod._compile(code, oldFilename)
}
}
for (const ext of extensions) {
const oldHook = require.extensions[ext] ?? oldJSHook
require.extensions[ext] = function (mod: any, oldFilename) {
const _compile = mod._compile
mod._compile = function (code: string, filename: string) {
const swc = transformSync(code, swcOptions)
return _compile.call(this, swc.code, filename)
}
return oldHook(mod, oldFilename)
}
}
}
export function deregisterHook() {
require.extensions['.js'] = oldJSHook
extensions.forEach((ext) => delete require.extensions[ext])
}
export function requireFromString(code: string, filename: string) {
const paths = (Module as any)._nodeModulePaths(dirname(filename))
const m = new Module(filename, module.parent!) as any
m.paths = paths
m._compile(code, filename)
return m.exports
}
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