bitbake: bitbake/hob: removing extra parameters from conf files using hob

In Hob settings, there is a tab to add/remove extra settings. This
patch implements a way to "remove" variables from conf files, through
bitbake. But, to keep the history assigment of the variables synchronized,
instead of removing, it replaces the lines with blank lines.

[YOCTO #5284]
(Bitbake rev: bd720fb63cef6b399619b8fbcaeb8d7710f2d6df)

Signed-off-by: Cristiana Voicu <cristiana.voicu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/ui/crumbs/builder.py

@@ -218,7 +218,7 @@ class Configuration:
         handler.set_var_in_file("SDKMACHINE", self.curr_sdk_machine, "local.conf")
         handler.set_var_in_file("CONF_VERSION", self.conf_version, "local.conf")
         handler.set_var_in_file("LCONF_VERSION", self.lconf_version, "bblayers.conf")
-        handler.set_var_in_file("EXTRA_SETTING", self.extra_setting, "local.conf")
+        handler.set_extra_config(self.extra_setting)
         handler.set_var_in_file("TOOLCHAIN_BUILD", self.toolchain_build, "local.conf")
         handler.set_var_in_file("IMAGE_FSTYPES", self.image_fstypes, "local.conf")
         if not defaults:

bitbake/lib/bb/ui/crumbs/hobeventhandler.py

@@ -21,6 +21,7 @@
 
 import gobject
 import logging
+import ast
 from bb.ui.crumbs.runningbuild import RunningBuild
 
 class HobHandler(gobject.GObject):
@@ -357,7 +358,20 @@ class HobHandler(gobject.GObject):
     def set_incompatible_license(self, incompat_license):
         self.set_var_in_file("INCOMPATIBLE_LICENSE", incompat_license, "local.conf")
 
+    def set_extra_setting(self, extra_setting):
+        self.set_var_in_file("EXTRA_SETTING", extra_setting, "local.conf")
+
     def set_extra_config(self, extra_setting):
+        old_extra_setting = ast.literal_eval(self.runCommand(["getVariable", "EXTRA_SETTING"]) or "{}")
+        if extra_setting:
+            self.set_var_in_file("EXTRA_SETTING", extra_setting, "local.conf")
+        else:
+            self.remove_var_from_file("EXTRA_SETTING")
+
+        #remove not needed settings from conf
+        for key in old_extra_setting:
+            if key not in extra_setting:
+                self.remove_var_from_file(key)
         for key in extra_setting.keys():
             value = extra_setting[key]
             self.set_var_in_file(key, value, "local.conf")
@@ -477,6 +491,9 @@ class HobHandler(gobject.GObject):
         self.server.runCommand(["setVarFile", var, val, default_file, "earlyAssign"])
         self.runCommand(["disableDataTracking"])
 
+    def remove_var_from_file(self, var):
+        self.server.runCommand(["removeVarFile", var])
+
     def append_var_in_file(self, var, val, default_file=None):
         self.server.runCommand(["setVarFile", var, val, default_file, "append"])