bb/ui: Use getSetVariable command for BB_CONSOLELOG

Metadata can define BB_CONSOLELOG as containing ${DATETIME} and
this can get expanded to a different value each time the variable
is read. In the case of BB_CONSOLELOG, this behaviour is not
desireable.

The values of DATE/TIME are locked down at build time but this is too
late for the purposes of ensuring the system can figure out the real
value of BB_CONSOLELOG.

The best way to do this is to set the variable into the datastore, thereby
preserving its value.

[YOCTO #8411]

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

lib/bb/ui/knotty.py

@@ -230,7 +230,7 @@ def _log_settings_from_server(server):
     if error:
         logger.error("Unable to get the value of BBINCLUDELOGS_LINES variable: %s" % error)
         raise BaseException(error)
-    consolelogfile, error = server.runCommand(["getVariable", "BB_CONSOLELOG"])
+    consolelogfile, error = server.runCommand(["getSetVariable", "BB_CONSOLELOG"])
     if error:
         logger.error("Unable to get the value of BB_CONSOLELOG variable: %s" % error)
         raise BaseException(error)

lib/bb/ui/toasterui.py

@@ -55,7 +55,7 @@ def _log_settings_from_server(server):
     if error:
         logger.error("Unable to get the value of BBINCLUDELOGS_LINES variable: %s", error)
         raise BaseException(error)
-    consolelogfile, error = server.runCommand(["getVariable", "BB_CONSOLELOG"])
+    consolelogfile, error = server.runCommand(["getSetVariable", "BB_CONSOLELOG"])
     if error:
         logger.error("Unable to get the value of BB_CONSOLELOG variable: %s", error)
         raise BaseException(error)