diff options
Diffstat (limited to 'classes')
-rw-r--r-- | classes/signature.bbclass | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/classes/signature.bbclass b/classes/signature.bbclass new file mode 100644 index 0000000000..17f7f6c59d --- /dev/null +++ b/classes/signature.bbclass @@ -0,0 +1,29 @@ +# 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) +} |