revlog: move the details of revlog "v2" index inside revlog.utils.constants
the revlog module is quite large and this kind of format information would handy
for other module. So let us start to gather this information about the format in
a more appropriate place.
We update various reference to this information to use the new "source of truth"
in the process.
Differential Revision: https://phab.mercurial-scm.org/D10305
from __future__ import absolute_import, print_function
# Import something from Mercurial, so the module loader gets initialized.
from mercurial import pycompat
del pycompat # unused for now
from hgext.lfs import pointer
def tryparse(text):
r = {}
try:
r = pointer.deserialize(text)
print('ok')
except Exception as ex:
print((b'%s' % ex).decode('ascii'))
if r:
text2 = r.serialize()
if text2 != text:
print('reconstructed text differs')
return r
t = (
b'version https://git-lfs.github.com/spec/v1\n'
b'oid sha256:4d7a214614ab2935c943f9e0ff69d22eadbb8f32b1'
b'258daaa5e2ca24d17e2393\n'
b'size 12345\n'
b'x-foo extra-information\n'
)
tryparse(b'')
tryparse(t)
tryparse(t.replace(b'git-lfs', b'unknown'))
tryparse(t.replace(b'v1\n', b'v1\n\n'))
tryparse(t.replace(b'sha256', b'ahs256'))
tryparse(t.replace(b'sha256:', b''))
tryparse(t.replace(b'12345', b'0x12345'))
tryparse(t.replace(b'extra-information', b'extra\0information'))
tryparse(t.replace(b'extra-information', b'extra\ninformation'))
tryparse(t.replace(b'x-foo', b'x_foo'))
tryparse(t.replace(b'oid', b'blobid'))
tryparse(t.replace(b'size', b'size-bytes').replace(b'oid', b'object-id'))