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.

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/lib/bb/siggen.py b/lib/bb/siggen.py
index fa8a6b1623f84df2a2d025b2e93faaec83011f36..b20b9cf7719e0a539c59a605d477fd8fd0f7d326 100644 (file)
--- a/lib/bb/siggen.py
+++ b/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