[gnome-continuous-yocto/gnomeostree-3.28-rocko: 7000/8267] bitbake: process: Allow BBUIEventQueue to exit cleanly

[Emmanuele Bassi <ebassi src gnome org>]

commit 76b6cdf414ac813783646d0456865fd20d89195f
Author: Richard Purdie <richard purdie linuxfoundation org>
Date:   Fri Jul 28 15:33:32 2017 +0100

    bitbake: process: Allow BBUIEventQueue to exit cleanly
    
    Currently the monitoring thread exits with some error code or runs indefinitely. Allow
    closure of the pipe its monitoring to have the thread exit cleanly/silently.
    
    (Bitbake rev: 930d077637928213e13a07c78fee3bf7a8c37ebf)
    
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 bitbake/lib/bb/server/process.py |   11 ++++++++---
 1 files changed, 8 insertions(+), 3 deletions(-)
---
diff --git a/bitbake/lib/bb/server/process.py b/bitbake/lib/bb/server/process.py
index 8a7c431..3d9077f 100644
--- a/bitbake/lib/bb/server/process.py
+++ b/bitbake/lib/bb/server/process.py
@@ -499,9 +499,14 @@ class BBUIEventQueue:
     def startCallbackHandler(self):
         bb.utils.set_process_name("UIEventQueue")
         while True:
-            self.reader.wait()
-            event = self.reader.get()
-            self.queue_event(event)
+            try:
+                self.reader.wait()
+                event = self.reader.get()
+                self.queue_event(event)
+            except EOFError:
+                # Easiest way to exit is to close the file descriptor to cause an exit
+                break
+        self.reader.close()
 
 class ConnectionReader(object):