// 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)
+ }
}
}
projects / dotfiles / .git / blobdiff