bitbake: cooker/cookerdata: Rework the way the datastores are reset

As far as I could tell, the current code could result in some strange
situations where some data was set back to the original data store copy
but the multiconfig data was not restored. There are also some changes made
to the datastore which did not persist.

The data store was also being reset at every client reset, which seems
a little excessive if we can reset it to the original condition properly.

Move the __depends -> __base_depends rename into databuilder along with
the __bbclasstype change so these are saved in the original data.

Tweak the databuilder code to be clearer and easier to follow on which
copies are where, then save copies of all the mc datastores.

Finally, drop the cache invalidation upon reset for the base config
as we shouldn't need that now (oe-selftest -r tinfoil works with memory
resident bitbake which was the original reproducer requiring that change).

(Bitbake rev: 5f8b9b9c35b4ec0c8c539bf54ca85f068f4a5094)

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

bitbake/lib/bb/cooker.py

@@ -400,9 +400,7 @@ class BBCooker:
             self.disableDataTracking()
 
         for mc in self.databuilder.mcdata.values():
-            mc.renameVar("__depends", "__base_depends")
             self.add_filewatch(mc.getVar("__base_depends", False), self.configwatcher)
-            mc.setVar("__bbclasstype", "recipe")
 
         self.baseconfig_valid = True
         self.parsecache_valid = False
@@ -436,10 +434,8 @@ class BBCooker:
                     upstream=upstream,
                 )
                 self.hashserv.serve_as_process()
-            self.data.setVar("BB_HASHSERVE", self.hashservaddr)
-            self.databuilder.origdata.setVar("BB_HASHSERVE", self.hashservaddr)
-            self.databuilder.data.setVar("BB_HASHSERVE", self.hashservaddr)
             for mc in self.databuilder.mcdata:
+                self.databuilder.mcorigdata[mc].setVar("BB_HASHSERVE", self.hashservaddr)
                 self.databuilder.mcdata[mc].setVar("BB_HASHSERVE", self.hashservaddr)
 
         bb.parse.init_parser(self.data)
@@ -1788,8 +1784,9 @@ class BBCooker:
         if hasattr(self, "data"):
            self.databuilder.reset()
            self.data = self.databuilder.data
+        # In theory tinfoil could have modified the base data before parsing,
+        # ideally need to track if anything did modify the datastore
         self.parsecache_valid = False
-        self.baseconfig_valid = False
 
 
 class CookerExit(bb.event.Event):

bitbake/lib/bb/cookerdata.py

@@ -263,6 +263,7 @@ class CookerDataBuilder(object):
         self.mcdata = {}
 
     def parseBaseConfiguration(self, worker=False):
+        mcdata = {}
         data_hash = hashlib.sha256()
         try:
             self.data = self.parseConfigurationFiles(self.prefiles, self.postfiles)
@@ -288,18 +289,18 @@ class CookerDataBuilder(object):
 
             bb.parse.init_parser(self.data)
             data_hash.update(self.data.get_hash().encode('utf-8'))
-            self.mcdata[''] = self.data
+            mcdata[''] = self.data
 
             multiconfig = (self.data.getVar("BBMULTICONFIG") or "").split()
             for config in multiconfig:
                 if config[0].isdigit():
                     bb.fatal("Multiconfig name '%s' is invalid as multiconfigs cannot start with a digit" % config)
-                mcdata = self.parseConfigurationFiles(self.prefiles, self.postfiles, config)
+                parsed_mcdata = self.parseConfigurationFiles(self.prefiles, self.postfiles, config)
-                bb.event.fire(bb.event.ConfigParsed(), mcdata)
+                bb.event.fire(bb.event.ConfigParsed(), parsed_mcdata)
-                self.mcdata[config] = mcdata
+                mcdata[config] = parsed_mcdata
-                data_hash.update(mcdata.get_hash().encode('utf-8'))
+                data_hash.update(parsed_mcdata.get_hash().encode('utf-8'))
             if multiconfig:
-                bb.event.fire(bb.event.MultiConfigParsed(self.mcdata), self.data)
+                bb.event.fire(bb.event.MultiConfigParsed(mcdata), self.data)
 
             self.data_hash = data_hash.hexdigest()
         except (SyntaxError, bb.BBHandledException):
@@ -332,17 +333,23 @@ class CookerDataBuilder(object):
         if issues:
             raise bb.BBHandledException()
 
+        for mc in mcdata:
+            mcdata[mc].renameVar("__depends", "__base_depends")
+            mcdata[mc].setVar("__bbclasstype", "recipe")
+
         # Create a copy so we can reset at a later date when UIs disconnect
-        self.origdata = self.data
+        self.mcorigdata = mcdata
-        self.data = bb.data.createCopy(self.origdata)
+        for mc in mcdata:
-        self.mcdata[''] = self.data
+            self.mcdata[mc] = bb.data.createCopy(mcdata[mc])
+        self.data = self.mcdata['']
 
     def reset(self):
         # We may not have run parseBaseConfiguration() yet
-        if not hasattr(self, 'origdata'):
+        if not hasattr(self, 'mcorigdata'):
             return
-        self.data = bb.data.createCopy(self.origdata)
+        for mc in self.mcorigdata:
-        self.mcdata[''] = self.data
+            self.mcdata[mc] = bb.data.createCopy(self.mcorigdata[mc])
+        self.data = self.mcdata['']
 
     def _findLayerConf(self, data):
         return findConfigFile("bblayers.conf", data)