[gnome-continuous-yocto/gnomeostree-3.28-rocko: 3737/8267] bitbake: siggen: add means of ignoring basehash mismatch

[Emmanuele Bassi <ebassi src gnome org>]

commit d856bce542b2d9dded904e2ee395c5a655080295
Author: Paul Eggleton <paul eggleton linux intel com>
Date:   Tue Dec 13 20:07:13 2016 +1300

    bitbake: siggen: add means of ignoring basehash mismatch
    
    If you run the setVariable command to set variables then you end up
    causing the basehash to not match the previously computed values, which
    triggers error messages. These mismatches are expected, so add a means
    of disabling them.
    
    (Bitbake rev: 5a80c0e210f26526afbe8f266b7b1a9c03334967)
    
    Signed-off-by: Paul Eggleton <paul eggleton linux intel com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 bitbake/lib/bb/siggen.py |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/bitbake/lib/bb/siggen.py b/bitbake/lib/bb/siggen.py
index fa8a6b1..b20b9cf 100644
--- a/bitbake/lib/bb/siggen.py
+++ b/bitbake/lib/bb/siggen.py
@@ -101,6 +101,7 @@ class SignatureGeneratorBasic(SignatureGenerator):
 
     def _build_data(self, fn, d):
 
+        ignore_mismatch = ((d.getVar("BB_HASH_IGNORE_MISMATCH", True) or '') == '1')
         tasklist, gendeps, lookupcache = bb.data.generate_dependencies(d)
 
         taskdeps = {}
@@ -135,7 +136,7 @@ class SignatureGeneratorBasic(SignatureGenerator):
                     data = data + str(var)
             datahash = hashlib.md5(data.encode("utf-8")).hexdigest()
             k = fn + "." + task
-            if k in self.basehash and self.basehash[k] != datahash:
+            if not ignore_mismatch and k in self.basehash and self.basehash[k] != datahash:
                 bb.error("When reparsing %s, the basehash value changed from %s to %s. The metadata is not 
deterministic and this needs to be fixed." % (k, self.basehash[k], datahash))
             self.basehash[k] = datahash
             taskdeps[task] = alldeps