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Add client loader to enable importing server actions
Made easier by facebook/react#26632
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,16 +1,25 @@ | ||
| import {createRequire} from 'module'; | ||
| import type {RuleSetUseItem} from 'webpack'; | ||
| import type {WebpackRscClientLoaderOptions} from './webpack-rsc-client-loader.cjs'; | ||
| import type {WebpackRscServerLoaderOptions} from './webpack-rsc-server-loader.cjs'; | ||
|
|
||
| export * from './webpack-rsc-client-loader.cjs'; | ||
| export * from './webpack-rsc-client-plugin.js'; | ||
| export * from './webpack-rsc-server-loader.cjs'; | ||
| export * from './webpack-rsc-server-plugin.js'; | ||
|
|
||
| const require = createRequire(import.meta.url); | ||
| const loader = require.resolve(`./webpack-rsc-server-loader.cjs`); | ||
| const serverLoader = require.resolve(`./webpack-rsc-server-loader.cjs`); | ||
| const clientLoader = require.resolve(`./webpack-rsc-client-loader.cjs`); | ||
|
|
||
| export function createWebpackRscServerLoader( | ||
| options: WebpackRscServerLoaderOptions, | ||
| ): RuleSetUseItem { | ||
| return {loader, options}; | ||
| return {loader: serverLoader, options}; | ||
| } | ||
|
|
||
| export function createWebpackRscClientLoader( | ||
| options: WebpackRscClientLoaderOptions, | ||
| ): RuleSetUseItem { | ||
| return {loader: clientLoader, options}; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,114 @@ | ||
| import generate from '@babel/generator'; | ||
| import {parse} from '@babel/parser'; | ||
| import traverse from '@babel/traverse'; | ||
| import * as t from '@babel/types'; | ||
| import type {LoaderContext} from 'webpack'; | ||
|
|
||
| export interface WebpackRscClientLoaderOptions { | ||
| readonly serverReferencesMap: ServerReferencesMap; | ||
| readonly callServerImportSource?: string; | ||
| } | ||
|
|
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| export type ServerReferencesMap = Map<string, ServerReferencesModuleInfo>; | ||
|
|
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| export interface ServerReferencesModuleInfo { | ||
| readonly moduleId: string | number; | ||
| readonly exportNames: string[]; | ||
| } | ||
|
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| export default function webpackRscClientLoader( | ||
| this: LoaderContext<WebpackRscClientLoaderOptions>, | ||
| source: string, | ||
| ): void { | ||
| this.cacheable(true); | ||
|
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| const {serverReferencesMap, callServerImportSource = `@mfng/core/client`} = | ||
| this.getOptions(); | ||
|
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| const loaderContext = this; | ||
| const resourcePath = this.resourcePath; | ||
|
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| const ast = parse(source, { | ||
| sourceType: `module`, | ||
| sourceFilename: resourcePath, | ||
| }); | ||
|
|
||
| traverse(ast, { | ||
| enter(path) { | ||
| const {node} = path; | ||
|
|
||
| if (!t.isProgram(node)) { | ||
| return; | ||
| } | ||
|
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| if (!node.directives.some(isUseServerDirective)) { | ||
| return; | ||
| } | ||
|
|
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| const moduleInfo = serverReferencesMap.get(resourcePath); | ||
|
|
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| if (!moduleInfo) { | ||
| loaderContext.emitError( | ||
| new Error( | ||
| `Could not find server references module info in \`serverReferencesMap\` for ${resourcePath}.`, | ||
| ), | ||
| ); | ||
|
|
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| path.replaceWith(t.program([])); | ||
|
|
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| return; | ||
| } | ||
|
|
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| const {moduleId, exportNames} = moduleInfo; | ||
|
|
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| path.replaceWith( | ||
| t.program([ | ||
| t.importDeclaration( | ||
| [ | ||
| t.importSpecifier( | ||
| t.identifier(`createServerReference`), | ||
| t.identifier(`createServerReference`), | ||
| ), | ||
| ], | ||
| t.stringLiteral(`react-server-dom-webpack/client`), | ||
| ), | ||
| t.importDeclaration( | ||
| [ | ||
| t.importSpecifier( | ||
| t.identifier(`callServer`), | ||
| t.identifier(`callServer`), | ||
| ), | ||
| ], | ||
| t.stringLiteral(callServerImportSource), | ||
| ), | ||
| ...exportNames.map((exportName) => | ||
| t.exportNamedDeclaration( | ||
| t.variableDeclaration(`const`, [ | ||
| t.variableDeclarator( | ||
| t.identifier(exportName), | ||
| t.callExpression(t.identifier(`createServerReference`), [ | ||
| t.stringLiteral(`${moduleId}#${exportName}`), | ||
| t.identifier(`callServer`), | ||
| ]), | ||
| ), | ||
| ]), | ||
| ), | ||
| ), | ||
| ]), | ||
| ); | ||
| }, | ||
| }); | ||
|
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| const {code} = generate(ast, {sourceFileName: this.resourcePath}); | ||
|
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| // TODO: Handle source maps. | ||
|
|
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| this.callback(null, code); | ||
| } | ||
|
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| function isUseServerDirective(directive: t.Directive): boolean { | ||
| return ( | ||
| t.isDirectiveLiteral(directive.value) && | ||
| directive.value.value === `use server` | ||
| ); | ||
| } |
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