bitbake: HOB: MACHINE should be saved in conf files using ?=

MACHINE var is saved using early assignment operator.
Calling  MACHINE=x bitbake core-image-... works properly.
Comment "#added by bitbake" is replaced with "#added by hob".

[YOCTO #5070]
(Bitbake rev: 2d0ec8ff083b636a6cf98de3278900eb95c3def6)

Signed-off-by: Valentin Popa <valentin.popa@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

3 files changed, 17 insertions, 9 deletions

diff --git a/bitbake/lib/bb/cooker.py b/bitbake/lib/bb/cooker.py
index ff2af69069..ce7ca43d2a 100644
--- a/bitbake/lib/bb/cooker.py
+++ b/bitbake/lib/bb/cooker.py
@@ -193,7 +193,10 @@ class BBCooker:
         if op == "append":
             self.appendConfigurationVar(var, val, default_file)
         elif op == "set":
-            self.saveConfigurationVar(var, val, default_file)
+            self.saveConfigurationVar(var, val, default_file, "=")
+        elif op == "earlyAssign":
+            self.saveConfigurationVar(var, val, default_file, "?=")
+
 
     def appendConfigurationVar(self, var, val, default_file):
         #add append var operation to the end of default_file
@@ -207,7 +210,7 @@ class BBCooker:
         for c in contents:
             total += c
 
-        total += "#added by bitbake"
+        total += "#added by hob"
         total += "\n%s += \"%s\"\n" % (var, val)
 
         with open(default_file, 'w') as f:
@@ -218,7 +221,7 @@ class BBCooker:
         loginfo = {"op":append, "file":default_file, "line":total.count("\n")}
         self.data.appendVar(var, val, **loginfo)
 
-    def saveConfigurationVar(self, var, val, default_file):
+    def saveConfigurationVar(self, var, val, default_file, op):
 
         replaced = False
         #do not save if nothing changed
@@ -260,8 +263,8 @@ class BBCooker:
                     #check if the variable was saved before in the same way
                     #if true it replace the place where the variable was declared
                     #else it comments it
-                    if contents[begin_line-1]== "#added by bitbake\n":
-                        contents[begin_line] = "%s = \"%s\"\n" % (var, val)
+                    if contents[begin_line-1]== "#added by hob\n":
+                        contents[begin_line] = "%s %s \"%s\"\n" % (var, op, val)
                         replaced = True
                     else:
                         for ii in range(begin_line, end_line):
@@ -290,8 +293,8 @@ class BBCooker:
                 total += c
 
             #add the variable on a single line, to be easy to replace the second time
-            total += "\n#added by bitbake"
-            total += "\n%s = \"%s\"\n" % (var, val)
+            total += "\n#added by hob"
+            total += "\n%s %s \"%s\"\n" % (var, op, val)
 
             with open(default_file, 'w') as f:
                 f.write(total)
diff --git a/bitbake/lib/bb/ui/crumbs/builder.py b/bitbake/lib/bb/ui/crumbs/builder.py
index 829281357d..46023cc585 100755
--- a/bitbake/lib/bb/ui/crumbs/builder.py
+++ b/bitbake/lib/bb/ui/crumbs/builder.py
@@ -198,7 +198,7 @@ class Configuration:
         handler.set_var_in_file("BBLAYERS", self.layers, "bblayers.conf")
         # local.conf
         if not defaults:
-            handler.set_var_in_file("MACHINE", self.curr_mach, "local.conf")
+            handler.early_assign_var_in_file("MACHINE", self.curr_mach, "local.conf")
         handler.set_var_in_file("DISTRO", self.curr_distro, "local.conf")
         handler.set_var_in_file("DL_DIR", self.dldir, "local.conf")
         handler.set_var_in_file("SSTATE_DIR", self.sstatedir, "local.conf")
diff --git a/bitbake/lib/bb/ui/crumbs/hobeventhandler.py b/bitbake/lib/bb/ui/crumbs/hobeventhandler.py
index ef74e563f9..3f5bebaca3 100644
--- a/bitbake/lib/bb/ui/crumbs/hobeventhandler.py
+++ b/bitbake/lib/bb/ui/crumbs/hobeventhandler.py
@@ -315,7 +315,7 @@ class HobHandler(gobject.GObject):
 
     def set_machine(self, machine):
         if machine:
-            self.set_var_in_file("MACHINE", machine, "local.conf")
+            self.early_assign_var_in_file("MACHINE", machine, "local.conf")
 
     def set_sdk_machine(self, sdk_machine):
         self.set_var_in_file("SDKMACHINE", sdk_machine, "local.conf")
@@ -472,6 +472,11 @@ class HobHandler(gobject.GObject):
         self.server.runCommand(["setVarFile", var, val, default_file, "set"])
         self.runCommand(["disableDataTracking"])
 
+    def early_assign_var_in_file(self, var, val, default_file=None):
+        self.runCommand(["enableDataTracking"])
+        self.server.runCommand(["setVarFile", var, val, default_file, "earlyAssign"])
+        self.runCommand(["disableDataTracking"])
+
     def append_var_in_file(self, var, val, default_file=None):
         self.server.runCommand(["setVarFile", var, val, default_file, "append"])