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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,142 @@ | ||
| import assert from "node:assert"; | ||
| import childProcess from "node:child_process"; | ||
| import http from "node:http"; | ||
| import { join } from "node:path"; | ||
| import { webToNodeHandler } from "@hiogawa/utils-node"; | ||
| import { DevEnvironment, type DevEnvironmentOptions } from "vite"; | ||
|
|
||
| // TODO | ||
| // can we abstract away child process? FetchBridgeDevEnvironment? | ||
| // multiple children per env (like Vitest)? need different API? | ||
| export class ChildProcessFetchDevEnvironment extends DevEnvironment { | ||
| public bridge!: http.Server; | ||
| public bridgeUrl!: string; | ||
| public child!: childProcess.ChildProcess; | ||
| public childUrl!: string; | ||
| public childUrlPromise!: PromiseWithResolvers<string>; | ||
|
|
||
| static createFactory(options: { | ||
| runtime: "node" | "bun"; | ||
| conditions?: string[]; | ||
| }): NonNullable<DevEnvironmentOptions["createEnvironment"]> { | ||
| return (name, config) => { | ||
| const command = [ | ||
| options.runtime === "node" ? ["node"] : [], | ||
| options.runtime === "bun" ? ["bun", "run"] : [], | ||
| options.conditions ? ["--conditions", ...options.conditions] : [], | ||
| join(import.meta.dirname, `./runtime/${options.runtime}.js`), | ||
| ].flat(); | ||
| return new ChildProcessFetchDevEnvironment({ command }, name, config, { | ||
| // TODO | ||
| hot: false, | ||
| }); | ||
| }; | ||
| } | ||
|
|
||
| constructor( | ||
| public extraOptions: { command: string[] }, | ||
| ...args: ConstructorParameters<typeof DevEnvironment> | ||
| ) { | ||
| super(...args); | ||
| } | ||
|
|
||
| override init: DevEnvironment["init"] = async (...args) => { | ||
| await super.init(...args); | ||
|
|
||
| const listener = webToNodeHandler(async (request) => { | ||
| const url = new URL(request.url); | ||
| // TODO: other than json? | ||
| if (url.pathname === "/rpc") { | ||
| const { method, args } = await request.json(); | ||
| assert(method in this); | ||
| const result = await (this as any)[method]!(...args); | ||
| return Response.json(result); | ||
| } | ||
| return undefined; | ||
| }); | ||
|
|
||
| const bridge = http.createServer((req, res) => { | ||
| listener(req, res, (e) => { | ||
| console.error(e); | ||
| res.statusCode = 500; | ||
| res.end("Internal server error"); | ||
| }); | ||
| }); | ||
| this.bridge = bridge; | ||
|
|
||
| await new Promise<void>((resolve, reject) => { | ||
| bridge.listen(() => { | ||
| const address = bridge.address(); | ||
| assert(address && typeof address !== "string"); | ||
| this.bridgeUrl = `http://localhost:${address.port}`; | ||
| resolve(); | ||
| }); | ||
| bridge.on("error", (e) => { | ||
| console.error(e); | ||
| reject(e); | ||
| }); | ||
| }); | ||
|
|
||
| // TODO: separate child process concern? | ||
| this.childUrlPromise = PromiseWithReoslvers(); | ||
| const command = this.extraOptions.command; | ||
| const child = childProcess.spawn( | ||
| command[0]!, | ||
| [ | ||
| ...command.slice(1), | ||
| JSON.stringify({ | ||
| bridgeUrl: this.bridgeUrl, | ||
| root: this.config.root, | ||
| }), | ||
| ], | ||
| { | ||
| stdio: ["ignore", "inherit", "inherit"], | ||
| }, | ||
| ); | ||
| this.child = child; | ||
| await new Promise<void>((resolve, reject) => { | ||
| child.on("spawn", () => { | ||
| resolve(); | ||
| }); | ||
| child.on("error", (e) => { | ||
| reject(e); | ||
| }); | ||
| }); | ||
| this.childUrl = await this.childUrlPromise.promise; | ||
| console.log("[environment.init]", { | ||
| bridgeUrl: this.bridgeUrl, | ||
| childUrl: this.childUrl, | ||
| }); | ||
| }; | ||
|
|
||
| override close: DevEnvironment["close"] = async (...args) => { | ||
| await super.close(...args); | ||
| this.child?.kill(); | ||
| this.bridge?.close(); | ||
| }; | ||
|
|
||
| async dispatchFetch(entry: string, request: Request): Promise<Response> { | ||
| const headers = new Headers(request.headers); | ||
| headers.set("x-vite-meta", JSON.stringify({ entry, url: request.url })); | ||
| const url = new URL(request.url); | ||
| const childUrl = new URL(this.childUrl); | ||
| url.host = childUrl.host; | ||
| return fetch(new Request(url, { ...request, headers })); | ||
| } | ||
|
|
||
| /** @internal rpc for runner */ | ||
| async register(childUrl: string) { | ||
| this.childUrlPromise.resolve(childUrl); | ||
| return true; | ||
| } | ||
| } | ||
|
|
||
| function PromiseWithReoslvers<T>(): PromiseWithResolvers<T> { | ||
| let resolve: any; | ||
| let reject: any; | ||
| const promise = new Promise<any>((resolve_, reject_) => { | ||
| resolve = resolve_; | ||
| reject = reject_; | ||
| }); | ||
| return { promise, resolve, reject }; | ||
| } |
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