rust-re2: add wrapper for calling Re2 from Rust
This assumes that Re2 is installed following Google's guide. I am not sure
how we want to integrate it in the project, but I think a follow-up patch would
be more appropriate for such work.
As it stands, *not* having Re2 installed results in a compilation error, which
is a problem as it breaks install compatibility. Hence, this is gated behind
a non-default `with-re2` compilation feature.
Differential Revision: https://phab.mercurial-scm.org/D7910
# Copyright 2017 Facebook, Inc.
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from __future__ import absolute_import
import os
from mercurial.node import hex
from mercurial import (
error,
extensions,
pycompat,
)
def isremotebooksenabled(ui):
return b'remotenames' in extensions._extensions and ui.configbool(
b'remotenames', b'bookmarks'
)
def downloadbundle(repo, unknownbinhead):
index = repo.bundlestore.index
store = repo.bundlestore.store
bundleid = index.getbundle(hex(unknownbinhead))
if bundleid is None:
raise error.Abort(b'%s head is not known' % hex(unknownbinhead))
bundleraw = store.read(bundleid)
return _makebundlefromraw(bundleraw)
def _makebundlefromraw(data):
fp = None
fd, bundlefile = pycompat.mkstemp()
try: # guards bundlefile
try: # guards fp
fp = os.fdopen(fd, 'wb')
fp.write(data)
finally:
fp.close()
except Exception:
try:
os.unlink(bundlefile)
except Exception:
# we would rather see the original exception
pass
raise
return bundlefile