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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,163 +1,200 @@ | ||
| // 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. | ||
| var assert = require('assert') | ||
| var signals = require('./signals.js') | ||
| var isWin = /^win/i.test(process.platform) | ||
|
|
||
| var EE = require('events') | ||
| /* istanbul ignore if */ | ||
| if (typeof EE !== 'function') { | ||
| EE = EE.EventEmitter | ||
| // grab a reference to node's real process object right away | ||
| var process = global.process | ||
|
|
||
| const processOk = function (process) { | ||
| return 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' | ||
| } | ||
|
|
||
| var emitter | ||
| if (process.__signal_exit_emitter__) { | ||
| emitter = process.__signal_exit_emitter__ | ||
| // some kind of non-node environment, just no-op | ||
| /* istanbul ignore if */ | ||
| if (!processOk(process)) { | ||
| module.exports = function () {} | ||
| } else { | ||
| emitter = process.__signal_exit_emitter__ = new EE() | ||
| emitter.count = 0 | ||
| emitter.emitted = {} | ||
| } | ||
|
|
||
| // Because this emitter is a global, we have to check to see if a | ||
| // previous version of this library failed to enable infinite listeners. | ||
| // I know what you're about to say. But literally everything about | ||
| // signal-exit is a compromise with evil. Get used to it. | ||
| if (!emitter.infinite) { | ||
| emitter.setMaxListeners(Infinity) | ||
| emitter.infinite = true | ||
| } | ||
|
|
||
| module.exports = function (cb, opts) { | ||
| assert.equal(typeof cb, 'function', 'a callback must be provided for exit handler') | ||
| var assert = require('assert') | ||
| var signals = require('./signals.js') | ||
| var isWin = /^win/i.test(process.platform) | ||
|
|
||
| var EE = require('events') | ||
| /* istanbul ignore if */ | ||
| if (typeof EE !== 'function') { | ||
| EE = EE.EventEmitter | ||
| } | ||
|
|
||
| if (loaded === false) { | ||
| load() | ||
| var emitter | ||
| if (process.__signal_exit_emitter__) { | ||
| emitter = process.__signal_exit_emitter__ | ||
| } else { | ||
| emitter = process.__signal_exit_emitter__ = new EE() | ||
| emitter.count = 0 | ||
| emitter.emitted = {} | ||
| } | ||
|
|
||
| var ev = 'exit' | ||
| if (opts && opts.alwaysLast) { | ||
| ev = 'afterexit' | ||
| // Because this emitter is a global, we have to check to see if a | ||
| // previous version of this library failed to enable infinite listeners. | ||
| // I know what you're about to say. But literally everything about | ||
| // signal-exit is a compromise with evil. Get used to it. | ||
| if (!emitter.infinite) { | ||
| emitter.setMaxListeners(Infinity) | ||
| emitter.infinite = true | ||
| } | ||
|
|
||
| var remove = function () { | ||
| emitter.removeListener(ev, cb) | ||
| if (emitter.listeners('exit').length === 0 && | ||
| emitter.listeners('afterexit').length === 0) { | ||
| unload() | ||
| module.exports = function (cb, opts) { | ||
| /* istanbul ignore if */ | ||
| if (!processOk(global.process)) { | ||
| return | ||
| } | ||
| } | ||
| emitter.on(ev, cb) | ||
| assert.equal(typeof cb, 'function', 'a callback must be provided for exit handler') | ||
|
|
||
| return remove | ||
| } | ||
| if (loaded === false) { | ||
| load() | ||
| } | ||
|
|
||
| module.exports.unload = unload | ||
| function unload () { | ||
| if (!loaded) { | ||
| return | ||
| } | ||
| loaded = false | ||
| var ev = 'exit' | ||
| if (opts && opts.alwaysLast) { | ||
| ev = 'afterexit' | ||
| } | ||
|
|
||
| signals.forEach(function (sig) { | ||
| try { | ||
| process.removeListener(sig, sigListeners[sig]) | ||
| } catch (er) {} | ||
| }) | ||
| process.emit = originalProcessEmit | ||
| process.reallyExit = originalProcessReallyExit | ||
| emitter.count -= 1 | ||
| } | ||
| var remove = function () { | ||
| emitter.removeListener(ev, cb) | ||
| if (emitter.listeners('exit').length === 0 && | ||
| emitter.listeners('afterexit').length === 0) { | ||
| unload() | ||
| } | ||
| } | ||
| emitter.on(ev, cb) | ||
|
|
||
| function emit (event, code, signal) { | ||
| if (emitter.emitted[event]) { | ||
| return | ||
| return remove | ||
| } | ||
| emitter.emitted[event] = true | ||
| emitter.emit(event, code, signal) | ||
| } | ||
|
|
||
| // { <signal>: <listener fn>, ... } | ||
| var sigListeners = {} | ||
| signals.forEach(function (sig) { | ||
| sigListeners[sig] = function listener () { | ||
| // 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. | ||
| var listeners = process.listeners(sig) | ||
| if (listeners.length === emitter.count) { | ||
| unload() | ||
| emit('exit', null, sig) | ||
| /* istanbul ignore next */ | ||
| emit('afterexit', null, sig) | ||
| /* istanbul ignore next */ | ||
| if (isWin && sig === 'SIGHUP') { | ||
| // "SIGHUP" throws an `ENOSYS` error on Windows, | ||
| // so use a supported signal instead | ||
| sig = 'SIGINT' | ||
| } | ||
| process.kill(process.pid, sig) | ||
| var unload = function unload () { | ||
| if (!loaded || !processOk(global.process)) { | ||
| return | ||
| } | ||
| loaded = false | ||
|
|
||
| signals.forEach(function (sig) { | ||
| try { | ||
| process.removeListener(sig, sigListeners[sig]) | ||
| } catch (er) {} | ||
| }) | ||
| process.emit = originalProcessEmit | ||
| process.reallyExit = originalProcessReallyExit | ||
| emitter.count -= 1 | ||
| } | ||
| }) | ||
|
|
||
| module.exports.signals = function () { | ||
| return signals | ||
| } | ||
| module.exports.unload = unload | ||
|
|
||
| module.exports.load = load | ||
|
|
||
| var loaded = false | ||
|
|
||
| function load () { | ||
| if (loaded) { | ||
| return | ||
| var emit = function emit (event, code, signal) { | ||
| /* istanbul ignore if */ | ||
| if (emitter.emitted[event]) { | ||
| return | ||
| } | ||
| emitter.emitted[event] = true | ||
| emitter.emit(event, code, signal) | ||
| } | ||
| 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. | ||
| emitter.count += 1 | ||
|
|
||
| signals = signals.filter(function (sig) { | ||
| try { | ||
| process.on(sig, sigListeners[sig]) | ||
| return true | ||
| } catch (er) { | ||
| return false | ||
|
|
||
| // { <signal>: <listener fn>, ... } | ||
| var sigListeners = {} | ||
| signals.forEach(function (sig) { | ||
| sigListeners[sig] = function listener () { | ||
| /* istanbul ignore if */ | ||
| if (!processOk(global.process)) { | ||
| return | ||
| } | ||
| // 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. | ||
| var listeners = process.listeners(sig) | ||
| if (listeners.length === emitter.count) { | ||
| unload() | ||
| emit('exit', null, sig) | ||
| /* istanbul ignore next */ | ||
| emit('afterexit', null, sig) | ||
| /* istanbul ignore next */ | ||
| if (isWin && sig === 'SIGHUP') { | ||
| // "SIGHUP" throws an `ENOSYS` error on Windows, | ||
| // so use a supported signal instead | ||
| sig = 'SIGINT' | ||
| } | ||
| /* istanbul ignore next */ | ||
| process.kill(process.pid, sig) | ||
| } | ||
| } | ||
| }) | ||
|
|
||
| process.emit = processEmit | ||
| process.reallyExit = processReallyExit | ||
| } | ||
| module.exports.signals = function () { | ||
| return signals | ||
| } | ||
|
|
||
| var originalProcessReallyExit = process.reallyExit | ||
| function processReallyExit (code) { | ||
| process.exitCode = code || 0 | ||
| emit('exit', process.exitCode, null) | ||
| /* istanbul ignore next */ | ||
| emit('afterexit', process.exitCode, null) | ||
| /* istanbul ignore next */ | ||
| originalProcessReallyExit.call(process, process.exitCode) | ||
| } | ||
| var loaded = false | ||
|
|
||
| var load = function load () { | ||
| if (loaded || !processOk(global.process)) { | ||
| return | ||
| } | ||
| 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. | ||
| emitter.count += 1 | ||
|
|
||
| signals = signals.filter(function (sig) { | ||
| try { | ||
| process.on(sig, sigListeners[sig]) | ||
| return true | ||
| } catch (er) { | ||
| return false | ||
| } | ||
| }) | ||
|
|
||
| process.emit = processEmit | ||
| process.reallyExit = processReallyExit | ||
| } | ||
| module.exports.load = load | ||
|
|
||
| var originalProcessEmit = process.emit | ||
| function processEmit (ev, arg) { | ||
| if (ev === 'exit') { | ||
| if (arg !== undefined) { | ||
| process.exitCode = arg | ||
| var originalProcessReallyExit = process.reallyExit | ||
| var processReallyExit = function processReallyExit (code) { | ||
| /* istanbul ignore if */ | ||
| if (!processOk(global.process)) { | ||
| return | ||
| } | ||
| var ret = originalProcessEmit.apply(this, arguments) | ||
| process.exitCode = code || /* istanbul ignore next */ 0 | ||
| emit('exit', process.exitCode, null) | ||
| /* istanbul ignore next */ | ||
| emit('afterexit', process.exitCode, null) | ||
| return ret | ||
| } else { | ||
| return originalProcessEmit.apply(this, arguments) | ||
| /* istanbul ignore next */ | ||
| originalProcessReallyExit.call(process, process.exitCode) | ||
| } | ||
|
|
||
| var originalProcessEmit = process.emit | ||
| var processEmit = function processEmit (ev, arg) { | ||
| if (ev === 'exit' && processOk(global.process)) { | ||
| /* istanbul ignore else */ | ||
| if (arg !== undefined) { | ||
| process.exitCode = arg | ||
| } | ||
| var ret = originalProcessEmit.apply(this, arguments) | ||
| /* istanbul ignore next */ | ||
| emit('exit', process.exitCode, null) | ||
| /* istanbul ignore next */ | ||
| emit('afterexit', process.exitCode, null) | ||
| /* istanbul ignore next */ | ||
| return ret | ||
| } else { | ||
| return originalProcessEmit.apply(this, arguments) | ||
| } | ||
| } | ||
| } |
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