code-server/packages/ide/src/client.ts

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import { exec } from "child_process";
import { promisify } from "util";
import { field, logger, time, Time } from "@coder/logger";
import { escapePath } from "@coder/server";
import { retry } from "./retry";
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export interface IClientOptions {
mkDirs?: string[];
}
/**
* A general abstraction of an IDE client.
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*
* Everything the client provides is asynchronous so you can wait on what
* you need from it without blocking anything else.
*
* It also provides task management to help asynchronously load and time
* external code.
*/
export class Client {
public readonly mkDirs: Promise<void>;
private start: Time | undefined;
private readonly progressElement: HTMLElement | undefined;
private tasks: string[];
private finishedTaskCount: number;
public constructor(options: IClientOptions) {
this.tasks = [];
this.finishedTaskCount = 0;
this.progressElement = typeof document !== "undefined"
? document.querySelector("#status > #progress > #fill") as HTMLElement
: undefined;
this.mkDirs = this.wrapTask("Creating directories", 100, async () => {
if (options.mkDirs && options.mkDirs.length > 0) {
await promisify(exec)(`mkdir -p ${options.mkDirs.map(escapePath).join(" ")}`);
}
});
// Prevent Firefox from trying to reconnect when the page unloads.
window.addEventListener("unload", () => {
retry.block();
});
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}
/**
* Wrap a task in some logging, timing, and progress updates. Can optionally
* wait on other tasks which won't count towards this task's time.
*/
public async wrapTask<T>(description: string, duration: number, task: () => Promise<T>): Promise<T>;
public async wrapTask<T, V>(description: string, duration: number, task: (v: V) => Promise<T>, t: Promise<V>): Promise<T>;
public async wrapTask<T, V1, V2>(description: string, duration: number, task: (v1: V1, v2: V2) => Promise<T>, t1: Promise<V1>, t2: Promise<V2>): Promise<T>;
public async wrapTask<T, V1, V2, V3>(description: string, duration: number, task: (v1: V1, v2: V2, v3: V3) => Promise<T>, t1: Promise<V1>, t2: Promise<V2>, t3: Promise<V3>): Promise<T>;
public async wrapTask<T, V1, V2, V3, V4>(description: string, duration: number, task: (v1: V1, v2: V2, v3: V3, v4: V4) => Promise<T>, t1: Promise<V1>, t2: Promise<V2>, t3: Promise<V3>, t4: Promise<V4>): Promise<T>;
public async wrapTask<T, V1, V2, V3, V4, V5>(description: string, duration: number, task: (v1: V1, v2: V2, v3: V3, v4: V4, v5: V5) => Promise<T>, t1: Promise<V1>, t2: Promise<V2>, t3: Promise<V3>, t4: Promise<V4>, t5: Promise<V5>): Promise<T>;
public async wrapTask<T, V1, V2, V3, V4, V5, V6>(description: string, duration: number, task: (v1: V1, v2: V2, v3: V3, v4: V4, v5: V5, v6: V6) => Promise<T>, t1: Promise<V1>, t2: Promise<V2>, t3: Promise<V3>, t4: Promise<V4>, t5: Promise<V5>, t6: Promise<V6>): Promise<T>;
public async wrapTask<T>(
description: string, duration: number = 100, task: (...args: any[]) => Promise<T>, ...after: Array<Promise<any>> // tslint:disable-line no-any
): Promise<T> {
this.tasks.push(description);
if (!this.start) {
this.start = time(1000);
}
const updateProgress = (): void => {
if (this.progressElement) {
this.progressElement.style.width = `${Math.round((this.finishedTaskCount / (this.tasks.length + this.finishedTaskCount)) * 100)}%`;
}
};
updateProgress();
let start: Time | undefined;
try {
const waitFor = await (after && after.length > 0 ? Promise.all(after) : Promise.resolve([]));
start = time(duration);
logger.info(description);
const value = await task(...waitFor);
logger.info(`Finished "${description}"`, field("duration", start));
const index = this.tasks.indexOf(description);
if (index !== -1) {
this.tasks.splice(index, 1);
}
++this.finishedTaskCount;
updateProgress();
if (this.tasks.length === 0) {
logger.info("Finished all queued tasks", field("duration", this.start), field("count", this.finishedTaskCount));
this.start = undefined;
}
return value;
} catch (error) {
logger.error(`Failed "${description}"`, field("duration", typeof start !== "undefined" ? start : "not started"), field("error", error));
if (this.progressElement) {
this.progressElement.style.backgroundColor = "red";
}
throw error;
}
}
}