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import type { webpack } from 'next/dist/compiled/webpack/webpack'
import { getRSCModuleInformation } from '../../analysis/get-page-static-info'
import { getModuleBuildInfo } from './get-module-build-info'
const flightClientModuleLoader: webpack.LoaderDefinitionFunction =
function transformSource(this, source: string, sourceMap: any) {
// Avoid buffer to be consumed
if (typeof source !== 'string') {
throw new Error('Expected source to have been transformed to a string.')
}
if (!this._module) {
return source
}
// Assign the RSC meta information to buildInfo.
const buildInfo = getModuleBuildInfo(this._module)
buildInfo.rsc = getRSCModuleInformation(source, false)
let prefix = ''
if (process.env.BUILTIN_FLIGHT_CLIENT_ENTRY_PLUGIN) {
const rscModuleInformationJson = JSON.stringify(buildInfo.rsc)
prefix = `/* __rspack_internal_rsc_module_information_do_not_use__ ${rscModuleInformationJson} */\n`
source = prefix + source
}
// This is a server action entry module in the client layer. We need to
// create re-exports of "virtual modules" to expose the reference IDs to the
// client separately so they won't be always in the same one module which is
// not splittable. This server action module tree shaking is only applied in
// production mode. In development mode, we want to preserve the original
// modules (as transformed by SWC) to ensure that source mapping works.
if (buildInfo.rsc.actionIds && process.env.NODE_ENV === 'production') {
return (
prefix +
Object.entries(buildInfo.rsc.actionIds)
.map(([id, name]) => {
return `export { ${name} } from 'next-flight-server-reference-proxy-loader?id=${id}&name=${name}!'`
})
.join('\n')
)
}
return this.callback(null, source, sourceMap)
}
export default flightClientModuleLoader
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