builder-util
Version:
Various utilities. Used by [electron-builder](https://github.com/electron-userland/electron-builder).
86 lines • 2.59 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.AsyncTaskManager = void 0;
const log_1 = require("./log");
const promise_1 = require("./promise");
class AsyncTaskManager {
constructor(cancellationToken) {
this.cancellationToken = cancellationToken;
this.tasks = [];
this.errors = [];
}
add(task) {
if (this.cancellationToken == null || !this.cancellationToken.cancelled) {
this.addTask(task());
}
}
addTask(promise) {
if (this.cancellationToken.cancelled) {
log_1.log.debug({ reason: "cancelled", stack: new Error().stack }, "async task not added");
if ("cancel" in promise) {
;
promise.cancel();
}
return;
}
this.tasks.push(promise.catch(it => {
log_1.log.debug({ error: it.message || it.toString() }, "async task error");
this.errors.push(it);
return Promise.resolve(null);
}));
}
cancelTasks() {
for (const task of this.tasks) {
if ("cancel" in task) {
;
task.cancel();
}
}
this.tasks.length = 0;
}
async awaitTasks() {
if (this.cancellationToken.cancelled) {
this.cancelTasks();
return [];
}
const checkErrors = () => {
if (this.errors.length > 0) {
this.cancelTasks();
throwError(this.errors);
return;
}
};
checkErrors();
let result = null;
const tasks = this.tasks;
let list = tasks.slice();
tasks.length = 0;
while (list.length > 0) {
const subResult = await Promise.all(list);
result = result == null ? subResult : result.concat(subResult);
checkErrors();
if (tasks.length === 0) {
break;
}
else {
if (this.cancellationToken.cancelled) {
this.cancelTasks();
return [];
}
list = tasks.slice();
tasks.length = 0;
}
}
return result || [];
}
}
exports.AsyncTaskManager = AsyncTaskManager;
function throwError(errors) {
if (errors.length === 1) {
throw errors[0];
}
else if (errors.length > 1) {
throw new promise_1.NestedError(errors, "Cannot cleanup: ");
}
}
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