diff options
Diffstat (limited to 'deps/npm/node_modules/signal-exit/dist/cjs/index.js')
| -rw-r--r-- | deps/npm/node_modules/signal-exit/dist/cjs/index.js | 273 |
1 files changed, 273 insertions, 0 deletions
diff --git a/deps/npm/node_modules/signal-exit/dist/cjs/index.js b/deps/npm/node_modules/signal-exit/dist/cjs/index.js new file mode 100644 index 0000000000..5a9ea081d7 --- /dev/null +++ b/deps/npm/node_modules/signal-exit/dist/cjs/index.js @@ -0,0 +1,273 @@ +"use strict"; +var _a; +Object.defineProperty(exports, "__esModule", { value: true }); +exports.unload = exports.load = exports.onExit = exports.signals = void 0; +// Note: since nyc uses this module to output coverage, any lines +// that are in the direct sync flow of nyc's outputCoverage are +// ignored, since we can never get coverage for them. +// grab a reference to node's real process object right away +const signals_js_1 = require("./signals.js"); +Object.defineProperty(exports, "signals", { enumerable: true, get: function () { return signals_js_1.signals; } }); +const processOk = (process) => !!process && + typeof process === 'object' && + typeof process.removeListener === 'function' && + typeof process.emit === 'function' && + typeof process.reallyExit === 'function' && + typeof process.listeners === 'function' && + typeof process.kill === 'function' && + typeof process.pid === 'number' && + typeof process.on === 'function'; +const kExitEmitter = Symbol.for('signal-exit emitter'); +const global = globalThis; +const ObjectDefineProperty = Object.defineProperty.bind(Object); +// teeny tiny ee +class Emitter { + emitted = { + afterExit: false, + exit: false, + }; + listeners = { + afterExit: [], + exit: [], + }; + count = 0; + id = Math.random(); + constructor() { + if (global[kExitEmitter]) { + console.error('reusing global emitter'); + return global[kExitEmitter]; + } + ObjectDefineProperty(global, kExitEmitter, { + value: this, + writable: false, + enumerable: false, + configurable: false, + }); + } + on(ev, fn) { + this.listeners[ev].push(fn); + } + removeListener(ev, fn) { + const list = this.listeners[ev]; + const i = list.indexOf(fn); + /* c8 ignore start */ + if (i === -1) { + return; + } + /* c8 ignore stop */ + if (i === 0 && list.length === 1) { + list.length = 0; + } + else { + list.splice(i, 1); + } + } + emit(ev, code, signal) { + if (this.emitted[ev]) { + return; + } + this.emitted[ev] = true; + for (const fn of this.listeners[ev]) { + fn(code, signal); + } + } +} +class SignalExitBase { +} +const signalExitWrap = (handler) => { + return { + onExit(cb, opts) { + return handler.onExit(cb, opts); + }, + load() { + return handler.load(); + }, + unload() { + return handler.unload(); + }, + }; +}; +class SignalExitFallback extends SignalExitBase { + onExit() { + return () => { }; + } + load() { } + unload() { } +} +class SignalExit extends SignalExitBase { + // "SIGHUP" throws an `ENOSYS` error on Windows, + // so use a supported signal instead + /* c8 ignore start */ + #hupSig = process.platform === 'win32' ? 'SIGINT' : 'SIGHUP'; + /* c8 ignore stop */ + #emitter = new Emitter(); + #process; + #originalProcessEmit; + #originalProcessReallyExit; + #sigListeners = {}; + #loaded = false; + constructor(process) { + super(); + this.#process = process; + // { <signal>: <listener fn>, ... } + this.#sigListeners = {}; + for (const sig of signals_js_1.signals) { + this.#sigListeners[sig] = () => { + // If there are no other listeners, an exit is coming! + // Simplest way: remove us and then re-send the signal. + // We know that this will kill the process, so we can + // safely emit now. + const listeners = this.#process.listeners(sig); + let { count } = this.#emitter; + // This is a workaround for the fact that signal-exit v3 and signal + // exit v4 are not aware of each other, and each will attempt to let + // the other handle it, so neither of them do. To correct this, we + // detect if we're the only handler *except* for previous versions + // of signal-exit. + /* c8 ignore start */ + //@ts-ignore + if (typeof process.__signal_exit_emitter__ === 'object') + count++; + /* c8 ignore stop */ + if (listeners.length === count) { + this.unload(); + this.#emitter.emit('exit', null, sig); + this.#emitter.emit('afterExit', null, sig); + /* c8 ignore start */ + process.kill(process.pid, sig === 'SIGHUP' ? this.#hupSig : sig); + /* c8 ignore stop */ + } + }; + } + this.#originalProcessReallyExit = process.reallyExit; + this.#originalProcessEmit = process.emit; + } + onExit(cb, opts) { + /* c8 ignore start */ + if (!processOk(this.#process)) { + return () => { }; + } + /* c8 ignore stop */ + if (this.#loaded === false) { + this.load(); + } + const ev = opts?.alwaysLast ? 'afterExit' : 'exit'; + this.#emitter.on(ev, cb); + return () => { + this.#emitter.removeListener(ev, cb); + if (this.#emitter.listeners['exit'].length === 0 && + this.#emitter.listeners['afterExit'].length === 0) { + this.unload(); + } + }; + } + load() { + if (this.#loaded) { + return; + } + this.#loaded = true; + // This is the number of onSignalExit's that are in play. + // It's important so that we can count the correct number of + // listeners on signals, and don't wait for the other one to + // handle it instead of us. + this.#emitter.count += 1; + for (const sig of signals_js_1.signals) { + try { + const fn = this.#sigListeners[sig]; + if (fn) + this.#process.on(sig, fn); + } + catch (_) { } + } + this.#process.emit = (ev, ...a) => { + return this.#processEmit(ev, ...a); + }; + this.#process.reallyExit = (code) => { + return this.#processReallyExit(code); + }; + } + unload() { + if (!this.#loaded) { + return; + } + this.#loaded = false; + signals_js_1.signals.forEach(sig => { + const listener = this.#sigListeners[sig]; + /* c8 ignore start */ + if (!listener) { + throw new Error('Listener not defined for signal: ' + sig); + } + /* c8 ignore stop */ + try { + this.#process.removeListener(sig, listener); + /* c8 ignore start */ + } + catch (_) { } + /* c8 ignore stop */ + }); + this.#process.emit = this.#originalProcessEmit; + this.#process.reallyExit = this.#originalProcessReallyExit; + this.#emitter.count -= 1; + } + #processReallyExit(code) { + /* c8 ignore start */ + if (!processOk(this.#process)) { + return 0; + } + this.#process.exitCode = code || 0; + /* c8 ignore stop */ + this.#emitter.emit('exit', this.#process.exitCode, null); + this.#emitter.emit('afterExit', this.#process.exitCode, null); + return this.#originalProcessReallyExit.call(this.#process, this.#process.exitCode); + } + #processEmit(ev, ...args) { + const og = this.#originalProcessEmit; + if (ev === 'exit' && processOk(this.#process)) { + if (typeof args[0] === 'number') { + this.#process.exitCode = args[0]; + /* c8 ignore start */ + } + /* c8 ignore start */ + const ret = og.call(this.#process, ev, ...args); + /* c8 ignore start */ + this.#emitter.emit('exit', this.#process.exitCode, null); + this.#emitter.emit('afterExit', this.#process.exitCode, null); + /* c8 ignore stop */ + return ret; + } + else { + return og.call(this.#process, ev, ...args); + } + } +} +const process = globalThis.process; +// wrap so that we call the method on the actual handler, without +// exporting it directly. +_a = signalExitWrap(processOk(process) ? new SignalExit(process) : new SignalExitFallback()), +/** + * Called when the process is exiting, whether via signal, explicit + * exit, or running out of stuff to do. + * + * If the global process object is not suitable for instrumentation, + * then this will be a no-op. + * + * Returns a function that may be used to unload signal-exit. + */ +exports.onExit = _a.onExit, +/** + * Load the listeners. Likely you never need to call this, unless + * doing a rather deep integration with signal-exit functionality. + * Mostly exposed for the benefit of testing. + * + * @internal + */ +exports.load = _a.load, +/** + * Unload the listeners. Likely you never need to call this, unless + * doing a rather deep integration with signal-exit functionality. + * Mostly exposed for the benefit of testing. + * + * @internal + */ +exports.unload = _a.unload; +//# sourceMappingURL=index.js.map
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