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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| import MagicString from 'magic-string' | ||
| import { ResolvedConfig } from '..' | ||
| import { Plugin } from '../plugin' | ||
|
|
||
| /** | ||
| * This plugin hooks into Node's module resolution algorithm at runtime, | ||
| * so that SSR builds can benefit from `resolve.dedupe` like they do | ||
| * in development. | ||
| */ | ||
| export function ssrRequireHookPlugin(config: ResolvedConfig): Plugin | null { | ||
| if (config.command !== 'build' || !config.resolve.dedupe?.length) { | ||
| return null | ||
| } | ||
| return { | ||
| name: 'vite:ssr-require-hook', | ||
| transform(code, id) { | ||
| const moduleInfo = this.getModuleInfo(id) | ||
| if (moduleInfo?.isEntry) { | ||
| const s = new MagicString(code) | ||
| s.prepend( | ||
| `;(${dedupeRequire.toString()})(${JSON.stringify( | ||
| config.resolve.dedupe | ||
| )});\n` | ||
| ) | ||
| return { | ||
| code: s.toString(), | ||
| map: s.generateMap({ | ||
| source: id | ||
| }) | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| type NodeResolveFilename = ( | ||
| request: string, | ||
| parent: NodeModule, | ||
| isMain: boolean, | ||
| options?: Record<string, any> | ||
| ) => string | ||
|
|
||
| /** Respect the `resolve.dedupe` option in production SSR. */ | ||
| function dedupeRequire(dedupe: string[]) { | ||
| const Module = require('module') as { _resolveFilename: NodeResolveFilename } | ||
| const resolveFilename = Module._resolveFilename | ||
| Module._resolveFilename = function (request, parent, isMain, options) { | ||
| if (request[0] !== '.' && request[0] !== '/') { | ||
| const parts = request.split('/') | ||
| const pkgName = parts[0][0] === '@' ? parts[0] + '/' + parts[1] : parts[0] | ||
| if (dedupe.includes(pkgName)) { | ||
| // Use this module as the parent. | ||
| parent = module | ||
| } | ||
| } | ||
| return resolveFilename!(request, parent, isMain, options) | ||
| } | ||
| } | ||
|
|
||
| export function hookNodeResolve( | ||
| getResolver: (resolveFilename: NodeResolveFilename) => NodeResolveFilename | ||
| ): () => void { | ||
| const Module = require('module') as { _resolveFilename: NodeResolveFilename } | ||
| const prevResolver = Module._resolveFilename | ||
| Module._resolveFilename = getResolver(prevResolver) | ||
| return () => { | ||
| Module._resolveFilename = prevResolver | ||
| } | ||
| } |
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