view tests/testlib/crash_transaction_late.py @ 44802:e0414fcd35e0

rust-filepatterns: match exact `rootglob`s with a `HashSet`, not in the regex

This optimization yields some very interesting results in `rootglob`-heavy
repositories.

I build a test repository of the following structure:

```
root
    /<uuid>/build/empty_file
    ... repeat for 4000 entries
```

and a `.hgignore` containing the corresponding 4000 `rootglob` entries pointing
to all `build/` folders.

Rust+c `hg status` goes from 350ms down to 110ms.

Differential Revision: https://phab.mercurial-scm.org/D8491

# tiny extension to abort a transaction very late during test
#
# Copyright 2020 Pierre-Yves David <[e-mail]>
#
# 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

from mercurial import (
    error,
    transaction,
)


def abort(fp):
    raise error.Abort(b"This is a late abort")


def reposetup(ui, repo):

    transaction.postfinalizegenerators.add(b'late-abort')

    class LateAbortRepo(repo.__class__):
        def transaction(self, *args, **kwargs):
            tr = super(LateAbortRepo, self).transaction(*args, **kwargs)
            tr.addfilegenerator(
                b'late-abort', [b'late-abort'], abort, order=9999999
            )
            return tr

    repo.__class__ = LateAbortRepo