1 files changed, 157 insertions, 0 deletions
diff --git a/node_modules/signal-exit/index.js b/node_modules/signal-exit/index.js
new file mode 100644
index 0000000..337f691
--- /dev/null
+++ b/node_modules/signal-exit/index.js
@@ -0,0 +1,157 @@
+// 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 EE = require('events')
+/* istanbul ignore if */
+if (typeof EE !== 'function') {
+  EE = EE.EventEmitter
+}
+
+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 = {}
+}
+
+// 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')
+
+  if (loaded === false) {
+    load()
+  }
+
+  var ev = 'exit'
+  if (opts && opts.alwaysLast) {
+    ev = 'afterexit'
+  }
+
+  var remove = function () {
+    emitter.removeListener(ev, cb)
+    if (emitter.listeners('exit').length === 0 &&
+        emitter.listeners('afterexit').length === 0) {
+      unload()
+    }
+  }
+  emitter.on(ev, cb)
+
+  return remove
+}
+
+module.exports.unload = unload
+function unload () {
+  if (!loaded) {
+    return
+  }
+  loaded = false
+
+  signals.forEach(function (sig) {
+    try {
+      process.removeListener(sig, sigListeners[sig])
+    } catch (er) {}
+  })
+  process.emit = originalProcessEmit
+  process.reallyExit = originalProcessReallyExit
+  emitter.count -= 1
+}
+
+function emit (event, code, signal) {
+  if (emitter.emitted[event]) {
+    return
+  }
+  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 */
+      process.kill(process.pid, sig)
+    }
+  }
+})
+
+module.exports.signals = function () {
+  return signals
+}
+
+module.exports.load = load
+
+var loaded = false
+
+function load () {
+  if (loaded) {
+    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
+}
+
+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 originalProcessEmit = process.emit
+function processEmit (ev, arg) {
+  if (ev === 'exit') {
+    if (arg !== undefined) {
+      process.exitCode = arg
+    }
+    var ret = originalProcessEmit.apply(this, arguments)
+    emit('exit', process.exitCode, null)
+    /* istanbul ignore next */
+    emit('afterexit', process.exitCode, null)
+    return ret
+  } else {
+    return originalProcessEmit.apply(this, arguments)
+  }
+}