bitbake: hob & bitbake: append a value to a variable from hob throught bitbake

It was necessary to append ${TOPDIR}/recipes/images to BBFILES.
Implemented the mechanism to append a value to a variable: a command and
the method in cooker.

[YOCTO #4193]
(Bitbake rev: 4aedbee90bd92395c2460a68702e6ede00e256c9)

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

bitbake/lib/bb/command.py

@@ -153,7 +153,7 @@ class CommandsSync:
         varname = params[0]
         expand = True
         if len(params) > 1:
-            expand = params[1]
+            expand = (params[1] == "True")
 
         return command.cooker.data.getVar(varname, expand)
     getVariable.readonly = True
@@ -230,7 +230,8 @@ class CommandsSync:
         var = params[0]
         val = params[1]
         default_file = params[2]
-        command.cooker.saveConfigurationVar(var, val, default_file)
+        op = params[3]
+        command.cooker.modifyConfigurationVar(var, val, default_file, op)
 
     def createConfigFile(self, command, params):
         """

bitbake/lib/bb/cooker.py

@@ -162,6 +162,35 @@ class BBCooker:
         self.data = self.databuilder.data
         self.data_hash = self.databuilder.data_hash
 
+    def modifyConfigurationVar(self, var, val, default_file, op):
+        if op == "append":
+            self.appendConfigurationVar(var, val, default_file)
+        elif op == "set":
+            self.saveConfigurationVar(var, val, default_file)
+
+    def appendConfigurationVar(self, var, val, default_file):
+        #add append var operation to the end of default_file
+        default_file = bb.cookerdata.findConfigFile(default_file)
+
+        with open(default_file, 'r') as f:
+            contents = f.readlines()
+        f.close()
+
+        total = ""
+        for c in contents:
+            total += c
+
+        total += "#added by bitbake"
+        total += "\n%s += \"%s\"\n" % (var, val)
+
+        with open(default_file, 'w') as f:
+            f.write(total)
+        f.close()
+
+        #add to history
+        loginfo = {"op":append, "file":default_file, "line":total.count("\n")}
+        self.data.appendVar(var, val, **loginfo)
+
     def saveConfigurationVar(self, var, val, default_file):
 
         replaced = False

bitbake/lib/bb/data.py

@@ -97,6 +97,10 @@ def delVar(var, d):
     """Removes a variable from the data set"""
     d.delVar(var)
 
+def appendVar(var, value, d):
+    """Append additional value to a variable"""
+    d.appendVar(var, value)
+
 def setVarFlag(var, flag, flagvalue, d):
     """Set a flag for a given variable to a given value"""
     d.setVarFlag(var, flag, flagvalue)

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

@@ -440,6 +440,7 @@ class Builder(gtk.Window):
         self.handler.connect("recipe-populated",         self.handler_recipe_populated_cb)
         self.handler.connect("package-populated",        self.handler_package_populated_cb)
 
+        self.handler.append_to_bbfiles("${TOPDIR}/recipes/images/*.bb")
         self.initiate_new_build_async()
 
         signal.signal(signal.SIGINT, self.event_handle_SIGINT)

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

@@ -471,9 +471,18 @@ class HobHandler(gobject.GObject):
 
     def set_var_in_file(self, var, val, default_file=None):
         self.runCommand(["enableDataTracking"])
-        self.server.runCommand(["setVarFile", var, val, default_file])
+        self.server.runCommand(["setVarFile", var, val, default_file, "set"])
         self.runCommand(["disableDataTracking"])
 
+    def append_var_in_file(self, var, val, default_file=None):
+        self.server.runCommand(["setVarFile", var, val, default_file, "append"])
+
+    def append_to_bbfiles(self, val):
+        bbfiles = self.runCommand(["getVariable", "BBFILES", "False"]) or ""
+        bbfiles = bbfiles.split()
+        if val not in bbfiles:
+            self.append_var_in_file("BBFILES", val, "local.conf")
+
     def get_parameters(self):
         # retrieve the parameters from bitbake
         params = {}