bitbake: bitbake: implement idle timeout for xmlrpc server

Idle timeout can be specified either by -T/--idle-timeout option or
by sessing BBTIMEOUT environment variable. Bitbake xmlrpc server
will unload itself when timeout exprired, i.e. when server is idle
for more than <idle timeout> seconds.

[YOCTO #5534]

(Bitbake rev: 5fa0b3a19e7d0f40790f737abeddf499d53f1f6a)

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/main.py

@@ -253,6 +253,10 @@ class BitBakeConfigParameters(cookerdata.ConfigParameters):
         parser.add_option("-B", "--bind", action="store", dest="bind", default=False,
                           help="The name/address for the bitbake server to bind to.")
 
+        parser.add_option("-T", "--idle-timeout", type=int,
+                          default=int(os.environ.get("BBTIMEOUT", "0")),
+                          help="Set timeout to unload bitbake server due to inactivity")
+
         parser.add_option("", "--no-setscene", action="store_true",
                           dest="nosetscene", default=False,
                           help="Do not run any setscene tasks. sstate will be ignored and "
@@ -337,7 +341,8 @@ def start_server(servermodule, configParams, configuration, features):
     single_use = not configParams.server_only and os.getenv('BBSERVER') != 'autostart'
     if configParams.bind:
         (host, port) = configParams.bind.split(':')
-        server.initServer((host, int(port)), single_use=single_use)
+        server.initServer((host, int(port)), single_use=single_use,
+                          idle_timeout=configParams.idle_timeout)
         configuration.interface = [server.serverImpl.host, server.serverImpl.port]
     else:
         server.initServer(single_use=single_use)