bitbake: process/cooker: Improve readypipe handling

Issues in start are not being correctly detected by the current readypipe
code. Change it to use specific "ready" or "fail" messages to correctly
determine the correct failure mode and avoid bitbake seeming to hang
(it does currently timeout eventually).

[YOCTO #12062]

(Bitbake rev: 60d4791e3dd05729d2a2adf6f3b203c80d466a73)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 14 insertions, 9 deletions

diff --git a/bitbake/lib/bb/cooker.py b/bitbake/lib/bb/cooker.py
index 7d040dcd88..8fe36eba1e 100644
--- a/bitbake/lib/bb/cooker.py
+++ b/bitbake/lib/bb/cooker.py
@@ -165,7 +165,7 @@ class BBCooker:
     Manages one bitbake build run
     """
 
-    def __init__(self, configuration, featureSet=None, readypipe=None):
+    def __init__(self, configuration, featureSet=None):
         self.recipecaches = None
         self.skiplist = {}
         self.featureset = CookerFeatures()
@@ -233,10 +233,6 @@ class BBCooker:
         # Let SIGHUP exit as SIGTERM
         signal.signal(signal.SIGHUP, self.sigterm_exception)
 
-        if readypipe:
-            os.write(readypipe, b"ready")
-            os.close(readypipe)
-
     def process_inotify_updates(self):
         for n in [self.confignotifier, self.notifier]:
             if n.check_events(timeout=0):
diff --git a/bitbake/lib/bb/server/process.py b/bitbake/lib/bb/server/process.py
index 5c7dfaefa1..6a12f01057 100644
--- a/bitbake/lib/bb/server/process.py
+++ b/bitbake/lib/bb/server/process.py
@@ -388,8 +388,10 @@ class BitBakeServer(object):
         self.bitbake_lock.close()
 
         ready = ConnectionReader(self.readypipe)
-        r = ready.wait(30)
-        if not r:
+        r = ready.poll(30)
+        if r:
+            r = ready.get()
+        if not r or r != "ready":
             ready.close()
             bb.error("Unable to start bitbake server")
             if os.path.exists(logfile):
@@ -404,8 +406,15 @@ class BitBakeServer(object):
         print("Starting bitbake server pid %d" % os.getpid())
         server = ProcessServer(self.bitbake_lock, self.sock, self.sockname)
         self.configuration.setServerRegIdleCallback(server.register_idle_function)
-
-        self.cooker = bb.cooker.BBCooker(self.configuration, self.featureset, self.readypipein)
+        writer = ConnectionWriter(self.readypipein)
+        try:
+            self.cooker = bb.cooker.BBCooker(self.configuration, self.featureset)
+            writer.send("ready")
+        except:
+            writer.send("fail")
+            raise
+        finally:
+            os.close(self.readypipein)
         server.cooker = self.cooker
         server.server_timeout = self.configuration.server_timeout
         server.xmlrpcinterface = self.configuration.xmlrpcinterface