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Run prettier instance in
worker_threads (#3016)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1 @@ | ||
| /src/worker/*.js |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,114 @@ | ||
| import { Worker } from "worker_threads"; | ||
| import * as url from "url"; | ||
| import * as path from "path"; | ||
| import { | ||
| PrettierFileInfoOptions, | ||
| PrettierFileInfoResult, | ||
| PrettierOptions, | ||
| PrettierSupportLanguage, | ||
| } from "./types"; | ||
|
|
||
| const worker = new Worker( | ||
| url.pathToFileURL(path.join(__dirname, "/worker/prettier-instance-worker.js")) | ||
| ); | ||
|
|
||
| export class PrettierWorkerInstance { | ||
| private importResolver: { | ||
| resolve: (version: string) => void; | ||
| reject: (version: string) => void; | ||
| } | null = null; | ||
|
|
||
| private callMethodResolvers: Map< | ||
| number, | ||
| { | ||
| resolve: (value: unknown) => void; | ||
| reject: (value: unknown) => void; | ||
| } | ||
| > = new Map(); | ||
|
|
||
| private currentCallMethodId = 0; | ||
|
|
||
| public version: string | null = null; | ||
|
|
||
| constructor(private modulePath: string) { | ||
| worker.on("message", ({ type, payload }) => { | ||
| switch (type) { | ||
| case "import": { | ||
| this.importResolver?.resolve(payload.version); | ||
| this.version = payload.version; | ||
| break; | ||
| } | ||
| case "callMethod": { | ||
| const resolver = this.callMethodResolvers.get(payload.id); | ||
| this.callMethodResolvers.delete(payload.id); | ||
| if (resolver) { | ||
| if (payload.isError) { | ||
| resolver.reject(payload.result); | ||
| } else { | ||
| resolver.resolve(payload.result); | ||
| } | ||
| } | ||
| break; | ||
| } | ||
| } | ||
| }); | ||
| } | ||
|
|
||
| public async import(): Promise</* version of imported prettier */ string> { | ||
| const promise = new Promise<string>((resolve, reject) => { | ||
| this.importResolver = { resolve, reject }; | ||
| }); | ||
| worker.postMessage({ | ||
| type: "import", | ||
| payload: { modulePath: this.modulePath }, | ||
| }); | ||
| return promise; | ||
| } | ||
|
|
||
| public async format( | ||
| source: string, | ||
| options?: PrettierOptions | ||
| ): Promise<string> { | ||
| const result = await this.callMethod("format", [source, options]); | ||
| return result; | ||
| } | ||
|
|
||
| public async getSupportInfo(): Promise<{ | ||
| languages: PrettierSupportLanguage[]; | ||
| }> { | ||
| const result = await this.callMethod("getSupportInfo", []); | ||
| return result; | ||
| } | ||
|
|
||
| public async clearConfigCache(): Promise<void> { | ||
| await this.callMethod("clearConfigCache", []); | ||
| } | ||
|
|
||
| public async getFileInfo( | ||
| filePath: string, | ||
| fileInfoOptions?: PrettierFileInfoOptions | ||
| ): Promise<PrettierFileInfoResult> { | ||
| const result = await this.callMethod("getFileInfo", [ | ||
| filePath, | ||
| fileInfoOptions, | ||
| ]); | ||
| return result; | ||
| } | ||
|
|
||
| private callMethod(methodName: string, methodArgs: unknown[]): Promise<any> { | ||
| const callMethodId = this.currentCallMethodId++; | ||
| const promise = new Promise((resolve, reject) => { | ||
| this.callMethodResolvers.set(callMethodId, { resolve, reject }); | ||
| }); | ||
| worker.postMessage({ | ||
| type: "callMethod", | ||
| payload: { | ||
| id: callMethodId, | ||
| modulePath: this.modulePath, | ||
| methodName, | ||
| methodArgs, | ||
| }, | ||
| }); | ||
| return promise; | ||
| } | ||
| } |
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