bitbake: cooker/hashserv: Allow autostarting of a local hash server using BB_HASHSERVE

Its useful, particularly in the local developer model of usage, for
bitbake to start and stop a hash equivalence server on local port,
rather than relying on one being started by the user before the build.

The new BB_HASHSERVE variable supports this.

The database handling is moved internally into the hashserv code so that
different threads/processes can be used for the server without errors.

(Bitbake rev: a4fa8f1bd88995ae60e10430316fbed63d478587)

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

bitbake/lib/hashserv/tests.py

@@ -11,14 +11,15 @@ import sqlite3
 import hashlib
 import urllib.request
 import json
+import tempfile
 from . import create_server
 
 class TestHashEquivalenceServer(unittest.TestCase):
     def setUp(self):
-        # Start an in memory hash equivalence server in the background bound to
+        # Start a hash equivalence server in the background bound to
         # an ephemeral port
-        db = sqlite3.connect(':memory:', check_same_thread=False)
-        self.server = create_server(('localhost', 0), db)
+        self.dbfile = tempfile.NamedTemporaryFile(prefix="bb-hashserv-db-")
+        self.server = create_server(('localhost', 0), self.dbfile.name)
         self.server_addr = 'http://localhost:%d' % self.server.socket.getsockname()[1]
         self.server_thread = threading.Thread(target=self.server.serve_forever)
         self.server_thread.start()