add hw2
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nik
279
node_modules/signal-exit/dist/cjs/index.js
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vendored
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279
node_modules/signal-exit/dist/cjs/index.js
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"use strict";
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var _a;
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.unload = exports.load = exports.onExit = exports.signals = void 0;
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// Note: since nyc uses this module to output coverage, any lines
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// that are in the direct sync flow of nyc's outputCoverage are
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// ignored, since we can never get coverage for them.
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// grab a reference to node's real process object right away
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const signals_js_1 = require("./signals.js");
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Object.defineProperty(exports, "signals", { enumerable: true, get: function () { return signals_js_1.signals; } });
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const processOk = (process) => !!process &&
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typeof process === 'object' &&
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typeof process.removeListener === 'function' &&
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typeof process.emit === 'function' &&
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typeof process.reallyExit === 'function' &&
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typeof process.listeners === 'function' &&
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typeof process.kill === 'function' &&
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typeof process.pid === 'number' &&
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typeof process.on === 'function';
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const kExitEmitter = Symbol.for('signal-exit emitter');
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const global = globalThis;
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const ObjectDefineProperty = Object.defineProperty.bind(Object);
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// teeny special purpose ee
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class Emitter {
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emitted = {
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afterExit: false,
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exit: false,
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};
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listeners = {
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afterExit: [],
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exit: [],
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};
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count = 0;
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id = Math.random();
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constructor() {
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if (global[kExitEmitter]) {
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return global[kExitEmitter];
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}
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ObjectDefineProperty(global, kExitEmitter, {
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value: this,
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writable: false,
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enumerable: false,
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configurable: false,
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});
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}
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on(ev, fn) {
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this.listeners[ev].push(fn);
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}
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removeListener(ev, fn) {
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const list = this.listeners[ev];
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const i = list.indexOf(fn);
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/* c8 ignore start */
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if (i === -1) {
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return;
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}
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/* c8 ignore stop */
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if (i === 0 && list.length === 1) {
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list.length = 0;
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}
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else {
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list.splice(i, 1);
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}
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}
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emit(ev, code, signal) {
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if (this.emitted[ev]) {
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return false;
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}
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this.emitted[ev] = true;
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let ret = false;
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for (const fn of this.listeners[ev]) {
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ret = fn(code, signal) === true || ret;
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}
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if (ev === 'exit') {
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ret = this.emit('afterExit', code, signal) || ret;
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}
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return ret;
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}
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}
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class SignalExitBase {
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}
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const signalExitWrap = (handler) => {
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return {
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onExit(cb, opts) {
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return handler.onExit(cb, opts);
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},
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load() {
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return handler.load();
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},
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unload() {
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return handler.unload();
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},
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};
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};
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class SignalExitFallback extends SignalExitBase {
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onExit() {
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return () => { };
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}
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load() { }
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unload() { }
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}
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class SignalExit extends SignalExitBase {
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// "SIGHUP" throws an `ENOSYS` error on Windows,
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// so use a supported signal instead
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/* c8 ignore start */
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#hupSig = process.platform === 'win32' ? 'SIGINT' : 'SIGHUP';
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/* c8 ignore stop */
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#emitter = new Emitter();
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#process;
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#originalProcessEmit;
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#originalProcessReallyExit;
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#sigListeners = {};
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#loaded = false;
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constructor(process) {
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super();
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this.#process = process;
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// { <signal>: <listener fn>, ... }
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this.#sigListeners = {};
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for (const sig of signals_js_1.signals) {
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this.#sigListeners[sig] = () => {
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// If there are no other listeners, an exit is coming!
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// Simplest way: remove us and then re-send the signal.
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// We know that this will kill the process, so we can
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// safely emit now.
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const listeners = this.#process.listeners(sig);
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let { count } = this.#emitter;
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// This is a workaround for the fact that signal-exit v3 and signal
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// exit v4 are not aware of each other, and each will attempt to let
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// the other handle it, so neither of them do. To correct this, we
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// detect if we're the only handler *except* for previous versions
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// of signal-exit, and increment by the count of listeners it has
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// created.
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/* c8 ignore start */
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const p = process;
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if (typeof p.__signal_exit_emitter__ === 'object' &&
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typeof p.__signal_exit_emitter__.count === 'number') {
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count += p.__signal_exit_emitter__.count;
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}
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/* c8 ignore stop */
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if (listeners.length === count) {
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this.unload();
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const ret = this.#emitter.emit('exit', null, sig);
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/* c8 ignore start */
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const s = sig === 'SIGHUP' ? this.#hupSig : sig;
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if (!ret)
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process.kill(process.pid, s);
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/* c8 ignore stop */
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}
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};
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}
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this.#originalProcessReallyExit = process.reallyExit;
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this.#originalProcessEmit = process.emit;
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}
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onExit(cb, opts) {
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/* c8 ignore start */
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if (!processOk(this.#process)) {
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return () => { };
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}
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/* c8 ignore stop */
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if (this.#loaded === false) {
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this.load();
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}
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const ev = opts?.alwaysLast ? 'afterExit' : 'exit';
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this.#emitter.on(ev, cb);
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return () => {
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this.#emitter.removeListener(ev, cb);
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if (this.#emitter.listeners['exit'].length === 0 &&
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this.#emitter.listeners['afterExit'].length === 0) {
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this.unload();
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}
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};
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}
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load() {
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if (this.#loaded) {
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return;
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}
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this.#loaded = true;
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// This is the number of onSignalExit's that are in play.
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// It's important so that we can count the correct number of
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// listeners on signals, and don't wait for the other one to
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// handle it instead of us.
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this.#emitter.count += 1;
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for (const sig of signals_js_1.signals) {
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try {
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const fn = this.#sigListeners[sig];
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if (fn)
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this.#process.on(sig, fn);
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}
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catch (_) { }
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}
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this.#process.emit = (ev, ...a) => {
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return this.#processEmit(ev, ...a);
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};
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this.#process.reallyExit = (code) => {
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return this.#processReallyExit(code);
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};
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}
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unload() {
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if (!this.#loaded) {
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return;
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}
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this.#loaded = false;
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signals_js_1.signals.forEach(sig => {
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const listener = this.#sigListeners[sig];
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/* c8 ignore start */
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if (!listener) {
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throw new Error('Listener not defined for signal: ' + sig);
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}
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/* c8 ignore stop */
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try {
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this.#process.removeListener(sig, listener);
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/* c8 ignore start */
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}
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catch (_) { }
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/* c8 ignore stop */
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});
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this.#process.emit = this.#originalProcessEmit;
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this.#process.reallyExit = this.#originalProcessReallyExit;
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this.#emitter.count -= 1;
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}
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#processReallyExit(code) {
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/* c8 ignore start */
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if (!processOk(this.#process)) {
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return 0;
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}
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this.#process.exitCode = code || 0;
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/* c8 ignore stop */
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this.#emitter.emit('exit', this.#process.exitCode, null);
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return this.#originalProcessReallyExit.call(this.#process, this.#process.exitCode);
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}
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#processEmit(ev, ...args) {
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const og = this.#originalProcessEmit;
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if (ev === 'exit' && processOk(this.#process)) {
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if (typeof args[0] === 'number') {
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this.#process.exitCode = args[0];
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/* c8 ignore start */
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}
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/* c8 ignore start */
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const ret = og.call(this.#process, ev, ...args);
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/* c8 ignore start */
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this.#emitter.emit('exit', this.#process.exitCode, null);
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/* c8 ignore stop */
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return ret;
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}
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else {
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return og.call(this.#process, ev, ...args);
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}
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}
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}
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const process = globalThis.process;
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// wrap so that we call the method on the actual handler, without
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// exporting it directly.
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_a = signalExitWrap(processOk(process) ? new SignalExit(process) : new SignalExitFallback()),
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/**
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* Called when the process is exiting, whether via signal, explicit
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* exit, or running out of stuff to do.
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*
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* If the global process object is not suitable for instrumentation,
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* then this will be a no-op.
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*
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* Returns a function that may be used to unload signal-exit.
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*/
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exports.onExit = _a.onExit,
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/**
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* Load the listeners. Likely you never need to call this, unless
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* doing a rather deep integration with signal-exit functionality.
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* Mostly exposed for the benefit of testing.
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*
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* @internal
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*/
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exports.load = _a.load,
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/**
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* Unload the listeners. Likely you never need to call this, unless
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* doing a rather deep integration with signal-exit functionality.
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* Mostly exposed for the benefit of testing.
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*
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* @internal
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*/
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exports.unload = _a.unload;
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//# sourceMappingURL=index.js.map
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