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# Generate a signature / hash from the metadata
#
# Using a blacklist rather than a whitelist is safest, at least if you're
# utilizing the signature in your pstage package filenames, as the failure
# mode for blacklist is an unnecessary rebuild from source, whereas the
# failure case for a whitelist is use of incorrect binaries.
BB_HASH_BLACKLIST += "BUILDSTART DATE TIME DATETIME \
__* *DIR \
BB_*"
def get_data_hash(d):
from fnmatch import fnmatchcase
try:
signature = d.hash()
except AttributeError:
blacklist = (d.getVar("BB_HASH_BLACKLIST", True) or "").split()
items = ((key, repr(d.getVar(key, False)))
for key in d.keys()
if not any(fnmatchcase(key, pattern) for pattern in blacklist))
signature = hash(frozenset(items))
return str(signature)
SIGNATURE = "${@get_data_hash(d.getVar('__RECIPEDATA', False) or d)}"
python () {
d.setVar("__RECIPEDATA", d)
}
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