refactor: reuse logic in main.swift

src/main.swift

@@ -1,6 +1,23 @@
 import AppKit
 import Darwin
 
+// - if the app is quit/force-quit from Activity Monitor, it will receive SIGTERM and applicationWillTerminate won't be called
+// - if the app crashes in swift code (e.g. unexpected nil object), SIGTRAP is sent
+// we intercept these signals, and do an emergency exit
+[SIGTERM, SIGTRAP].forEach {
+    signal($0) { s in
+        emergencyExit("Exiting after receiving signal", s)
+    }
+}
+
+// - if the app crashes in objective-c code, an NSException may be sent
+// we intercept the exception, and do an emergency exit
+NSSetUncaughtExceptionHandler { (exception) in
+    emergencyExit("Exiting after receiving uncaught NSException", exception)
+}
+
+App.shared.run()
+
 func printStackTrace() {
     let stackSymbols = Thread.callStackSymbols
     for symbol in stackSymbols {
@@ -8,25 +25,10 @@ func printStackTrace() {
     }
 }
 
-// - if the app is quit/force-quit from Activity Monitor, it will receive SIGTERM and applicationWillTerminate won't be called
-// - if the app crashes in swift code (e.g. unexpected nil object), SIGTRAP is sent
-// we intercept these signals, and reset the native command-tab shortcut
-[SIGTERM, SIGTRAP].forEach {
-    signal($0) { s in
-        setNativeCommandTabEnabled(true)
-        debugPrint("Exiting after receiving signal", s)
-        printStackTrace()
-        exit(0)
-    }
-}
-
-// - if the app crashes in objective-c code, an NSException may be sent
-// we intercept the exception, and reset the native command-tab shortcut
-NSSetUncaughtExceptionHandler { (exception) in
+// during an emergency exit, we re-enable the native command+tab, and log
+fileprivate func emergencyExit(_ logs: Any?...) {
     setNativeCommandTabEnabled(true)
-    debugPrint("Exiting after receiving uncaught NSException", exception)
+    print(logs)
     printStackTrace()
     exit(0)
 }
-
-App.shared.run()