bitbake: toaster script: webport option and other improvements

We add the "webport=" command line option as to allow starting
the web server on a custom port.

The bitbake server port is now auto-allocated. This is needed
to be able to run multiple toaster environments on a single machine.

We tackle bug 6023 (toaster refusing to start when lock file is present)
by using more specific checks, and automatically recover from
bitbake server down / webserver up error mode.

Command line parameters are now read on both interactive and managed
modes.

The localhost and ssh controllers are updated to work with the modified
toaster launcher script.

[YOCTO #6023]

(Bitbake rev: cd3eb5b051743463cfe51dba97cae4da75420048)

Signed-off-by: Alexandru DAMIAN <alexandru.damian@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/bldcontrol/bbcontroller.py

@@ -117,6 +117,25 @@ class BuildEnvironmentController(object):
         self.be = be
         self.connection = None
 
+    @staticmethod
+    def _updateBBLayers(bblayerconf, layerlist):
+        conflines = open(bblayerconf, "r").readlines()
+
+        bblayerconffile = open(bblayerconf, "w")
+        skip = 0
+        for i in xrange(len(conflines)):
+            if skip > 0:
+                skip =- 1
+                continue
+            if conflines[i].startswith("# line added by toaster"):
+                skip = 1
+            else:
+                bblayerconffile.write(conflines[i])
+
+        bblayerconffile.write("# line added by toaster build control\nBBLAYERS = \"" + " ".join(layerlist) + "\"")
+        bblayerconffile.close()
+
+
 
     def startBBServer(self, brbe):
         """ Starts a  BB server with Toaster toasterui set up to record the builds, an no controlling UI.