Cleanup: pass the exit-code to WM_exit

Callers to WM_exit needed to set G.is_break for a predictable exit-code.
This is error prone as G.is_break may be set based on the user having
pressed escape during event handling.

Instead, pass the exit code as an argument.

intern/ghost/intern/GHOST_SystemCocoa.mm

@@ -429,8 +429,7 @@ extern "C" int GHOST_HACK_getFirstFile(char buf[FIRSTFILEBUFLG])
 - (void)applicationWillTerminate:(NSNotification *)aNotification
 {
 #if 0
-  G.is_break = false; /* Let Cocoa perform the termination at the end. */
+  WM_exit(C, EXIT_SUCCESS);
-  WM_exit(C);
 #endif
 }
 

source/blender/windowmanager/WM_api.h

@@ -108,8 +108,11 @@ void WM_exit_ex(struct bContext *C, bool do_python);
  * \brief Main exit function to close Blender ordinarily.
  * \note Use #wm_exit_schedule_delayed() to close Blender from an operator.
  * Might leak memory otherwise.
+ *
+ * \param exit_code: Passed to #exit, typically #EXIT_SUCCESS or #EXIT_FAILURE should be used.
+ * With failure being used for an early exit when parsing command line arguments fails.
  */
-void WM_exit(struct bContext *C) ATTR_NORETURN;
+void WM_exit(struct bContext *C, int exit_code) ATTR_NORETURN;
 
 void WM_main(struct bContext *C) ATTR_NORETURN;
 

source/blender/windowmanager/intern/wm_init_exit.cc

@@ -450,10 +450,7 @@ static void wait_for_console_key(void)
 
 static int wm_exit_handler(bContext *C, const wmEvent *event, void *userdata)
 {
-  /* Prevent a non-zero exit code (if escape was pressed by the user). */
+  WM_exit(C, EXIT_SUCCESS);
-  G.is_break = false;
-
-  WM_exit(C);
 
   UNUSED_VARS(event, userdata);
   return WM_UI_HANDLER_BREAK;
@@ -693,7 +690,7 @@ void WM_exit_ex(bContext *C, const bool do_python)
   CLG_exit();
 }
 
-void WM_exit(bContext *C)
+void WM_exit(bContext *C, const int exit_code)
 {
   WM_exit_ex(C, true);
 
@@ -707,7 +704,7 @@ void WM_exit(bContext *C)
   }
 #endif
 
-  exit(G.is_break == true);
+  exit(exit_code);
 }
 
 void WM_script_tag_reload(void)

source/creator/creator.c

@@ -574,7 +574,7 @@ int main(int argc,
 #ifndef WITH_PYTHON_MODULE
   if (G.background) {
     /* Using window-manager API in background-mode is a bit odd, but works fine. */
-    WM_exit(C);
+    WM_exit(C, G.is_break ? EXIT_FAILURE : EXIT_SUCCESS);
   }
   else {
     /* Shows the splash as needed. */

source/creator/creator_args.c

@@ -2271,9 +2271,7 @@ static bool handle_load_file(bContext *C, const char *filepath_arg, const bool l
 
     if (error_msg) {
       fprintf(stderr, "Error: %s, exiting! %s\n", error_msg, filepath);
-
+      WM_exit(C, EXIT_FAILURE);
-      G.is_break = true;
-      WM_exit(C);
       /* Unreachable, return for clarity. */
       return false;
     }