bitbake: siggen: Ensure version of siggen is verified

Since we need to change the form of the siggen function, we need to add versioning
and some verison checks. This means if a newer bitbake is used with older metadata
we can detect it.

(Bitbake rev: 721556568413508213d22c29985e305a45a8d68a)

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

bitbake/lib/bb/command.py

@@ -777,6 +777,7 @@ class CommandsAsync:
         (mc, pn) = bb.runqueue.split_mc(params[0])
         taskname = params[1]
         sigs = params[2]
+        bb.siggen.check_siggen_version(bb.siggen)
         res = bb.siggen.find_siginfo(pn, taskname, sigs, command.cooker.databuilder.mcdata[mc])
         bb.event.fire(bb.event.FindSigInfoResult(res), command.cooker.databuilder.mcdata[mc])
         command.finishAsyncCommand()

bitbake/lib/bb/runqueue.py

@@ -1749,6 +1749,7 @@ class RunQueue:
         return invalidtasks.difference(found)
 
     def write_diffscenetasks(self, invalidtasks):
+        bb.siggen.check_siggen_version(bb.siggen)
 
         # Define recursion callback
         def recursecb(key, hash1, hash2):

bitbake/lib/bb/siggen.py

@@ -24,6 +24,16 @@ import hashserv.client
 logger = logging.getLogger('BitBake.SigGen')
 hashequiv_logger = logging.getLogger('BitBake.SigGen.HashEquiv')
 
+#find_siginfo and find_siginfo_version are set by the metadata siggen
+# The minimum version of the find_siginfo function we need
+find_siginfo_minversion = 2
+
+def check_siggen_version(siggen):
+    if not hasattr(siggen, "find_siginfo_version"):
+        bb.fatal("Siggen from metadata (OE-Core?) is too old, please update it (no version found)")
+    if siggen.find_siginfo_version < siggen.find_siginfo_minversion:
+        bb.fatal("Siggen from metadata (OE-Core?) is too old, please update it (%s vs %s)" % (siggen.find_siginfo_version, siggen.find_siginfo_minversion))
+
 class SetEncoder(json.JSONEncoder):
     def default(self, obj):
         if isinstance(obj, set) or isinstance(obj, frozenset):