bitbake: fetch2/git: Add sanity check to ensure we really did fetch the correct revisions

The fetcher made the rather bold assumption that if it fetched from the upstream,
the revisions were present and correct. These checks are fast and ensure that
really is the case. The avoids accidental network accessed and missing
branch configuration problems.

(Bitbake rev: a9112a102a89049cda597dad449e922c9e957a5d)

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

bitbake/lib/bb/fetch2/git.py

@@ -213,6 +213,9 @@ class Git(FetchMethod):
             runfetchcmd("%s prune-packed" % ud.basecmd, d)
             runfetchcmd("%s pack-redundant --all | xargs -r rm" % ud.basecmd, d)
             ud.repochanged = True
+        for name in ud.names:
+            if not self._contains_ref(ud.revisions[name], ud.branches[name], d):
+                raise bb.fetch2.FetchError("Unable to find revision %s in branch %s even from upstream" % (ud.revisions[name], ud.branches[name]))
 
     def build_mirror_data(self, ud, d):
         # Generate a mirror tarball if needed