concurrently
Version:
Run commands concurrently
89 lines (88 loc) • 4.03 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.RestartProcess = void 0;
const Rx = __importStar(require("rxjs"));
const operators_1 = require("rxjs/operators");
const defaults = __importStar(require("../defaults"));
/**
* Restarts commands that fail up to a defined number of times.
*/
class RestartProcess {
logger;
scheduler;
delay;
tries;
constructor({ delay, tries, logger, scheduler, }) {
this.logger = logger;
this.delay = delay ?? 0;
this.tries = tries != null ? +tries : defaults.restartTries;
this.tries = this.tries < 0 ? Infinity : this.tries;
this.scheduler = scheduler;
}
handle(commands) {
if (this.tries === 0) {
return { commands };
}
const delayOperator = (0, operators_1.delayWhen)((_, index) => {
const { delay } = this;
const value = delay === 'exponential' ? Math.pow(2, index) * 1000 : delay;
return Rx.timer(value, this.scheduler);
});
commands
.map((command) => command.close.pipe((0, operators_1.take)(this.tries), (0, operators_1.takeWhile)(({ exitCode }) => exitCode !== 0)))
.map((failure, index) => Rx.merge(
// Delay the emission (so that the restarts happen on time),
// explicitly telling the subscriber that a restart is needed
failure.pipe(delayOperator, (0, operators_1.map)(() => true)),
// Skip the first N emissions (as these would be duplicates of the above),
// meaning it will be empty because of success, or failed all N times,
// and no more restarts should be attempted.
failure.pipe((0, operators_1.skip)(this.tries), (0, operators_1.map)(() => false), (0, operators_1.defaultIfEmpty)(false))).subscribe((restart) => {
const command = commands[index];
if (restart) {
this.logger.logCommandEvent(`${command.command} restarted`, command);
command.start();
}
}));
return {
commands: commands.map((command) => {
const closeStream = command.close.pipe((0, operators_1.filter)(({ exitCode }, emission) => {
// We let all success codes pass, and failures only after restarting won't happen again
return exitCode === 0 || emission >= this.tries;
}));
// Return a proxy so that mutations happen on the original Command object.
// If either `Object.assign()` or `Object.create()` were used, it'd be hard to
// reflect the mutations on Command objects referenced by previous flow controllers.
return new Proxy(command, {
get(target, prop) {
return prop === 'close' ? closeStream : target[prop];
},
});
}),
};
}
}
exports.RestartProcess = RestartProcess;