[gnome-builder] subprocess: add exited signal to supervisor

[Christian Hergert <chergert src gnome org>]

commit 24a3243c7c1d48829d3c359bf50823b7aa9a1228
Author: Christian Hergert <chergert redhat com>
Date:   Mon Apr 23 16:52:41 2018 -0700

    subprocess: add exited signal to supervisor
    
    This simplifies the process of tracking if we can write to a given pipe.

 src/libide/subprocess/ide-subprocess-supervisor.c | 11 +++++++++++
 1 file changed, 11 insertions(+)
---
diff --git a/src/libide/subprocess/ide-subprocess-supervisor.c 
b/src/libide/subprocess/ide-subprocess-supervisor.c
index 42a4f2e03..7856a5e14 100644
--- a/src/libide/subprocess/ide-subprocess-supervisor.c
+++ b/src/libide/subprocess/ide-subprocess-supervisor.c
@@ -46,6 +46,7 @@ enum {
   SPAWNED,
   SUPERVISE,
   UNSUPERVISE,
+  EXITED,
   N_SIGNALS
 };
 
@@ -159,6 +160,14 @@ ide_subprocess_supervisor_class_init (IdeSubprocessSupervisorClass *klass)
                                 g_signal_accumulator_true_handled, NULL,
                                 NULL,
                                 G_TYPE_BOOLEAN, 1, IDE_TYPE_SUBPROCESS_LAUNCHER);
+
+  signals [EXITED] =
+    g_signal_new_class_handler ("exited",
+                                G_TYPE_FROM_CLASS (klass),
+                                G_SIGNAL_RUN_LAST,
+                                NULL, NULL, NULL,
+                                g_cclosure_marshal_VOID__OBJECT,
+                                G_TYPE_NONE, 1, IDE_TYPE_SUBPROCESS);
 }
 
 static void
@@ -342,6 +351,8 @@ ide_subprocess_supervisor_wait_cb (GObject      *object,
   if (!ide_subprocess_wait_finish (subprocess, result, &error))
     g_warning ("%s", error->message);
 
+  g_signal_emit (self, signals [EXITED], 0, subprocess);
+
 #ifdef IDE_ENABLE_TRACE
   {
     if (ide_subprocess_get_if_exited (subprocess))