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- "use strict";
- Object.defineProperty(exports, "__esModule", {
- value: true
- });
- exports.SigIntWatcher = void 0;
- var _class2;
- /**
- * Copyright (c) Microsoft Corporation.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- class SigIntWatcher {
- constructor() {
- this._hadSignal = false;
- this._sigintPromise = void 0;
- this._sigintHandler = void 0;
- let sigintCallback;
- this._sigintPromise = new Promise(f => sigintCallback = f);
- this._sigintHandler = () => {
- FixedNodeSIGINTHandler.off(this._sigintHandler);
- this._hadSignal = true;
- sigintCallback();
- };
- FixedNodeSIGINTHandler.on(this._sigintHandler);
- }
- promise() {
- return this._sigintPromise;
- }
- hadSignal() {
- return this._hadSignal;
- }
- disarm() {
- FixedNodeSIGINTHandler.off(this._sigintHandler);
- }
- }
- // NPM/NPX will send us duplicate SIGINT signals, so we need to ignore them.
- exports.SigIntWatcher = SigIntWatcher;
- class FixedNodeSIGINTHandler {
- static _install() {
- if (!this._handlerInstalled) {
- this._handlerInstalled = true;
- process.on('SIGINT', this._dispatch);
- }
- }
- static _uninstall() {
- if (this._handlerInstalled) {
- this._handlerInstalled = false;
- process.off('SIGINT', this._dispatch);
- }
- }
- static on(handler) {
- this._handlers.push(handler);
- if (this._handlers.length === 1) this._install();
- }
- static off(handler) {
- this._handlers = this._handlers.filter(h => h !== handler);
- if (!this._ignoreNextSIGINTs && !this._handlers.length) this._uninstall();
- }
- }
- _class2 = FixedNodeSIGINTHandler;
- FixedNodeSIGINTHandler._handlers = [];
- FixedNodeSIGINTHandler._ignoreNextSIGINTs = false;
- FixedNodeSIGINTHandler._handlerInstalled = false;
- FixedNodeSIGINTHandler._dispatch = () => {
- if (_class2._ignoreNextSIGINTs) return;
- _class2._ignoreNextSIGINTs = true;
- setTimeout(() => {
- _class2._ignoreNextSIGINTs = false;
- // We remove the handler so that second Ctrl+C immediately kills the process
- // via the default sigint handler. This is handy in the case where our shutdown
- // takes a lot of time or is buggy.
- //
- // When running through NPM we might get multiple SIGINT signals
- // for a single Ctrl+C - this is an NPM bug present since NPM v6+.
- // https://github.com/npm/cli/issues/1591
- // https://github.com/npm/cli/issues/2124
- // https://github.com/npm/cli/issues/5021
- //
- // Therefore, removing the handler too soon will just kill the process
- // with default handler without printing the results.
- // We work around this by giving NPM 1000ms to send us duplicate signals.
- // The side effect is that slow shutdown or bug in our process will force
- // the user to hit Ctrl+C again after at least a second.
- if (!_class2._handlers.length) _class2._uninstall();
- }, 1000);
- for (const handler of _class2._handlers) handler();
- };
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