mercurial/txnutil.py

run-tests: bump the default timeout on Windows to 4x the normal value

There are a ridiculous number of tests that timeout on Windows with the 360 sec
default (~60).  And because of the bug where timed out tests still run to
completion before the results are thrown away[1], the timeout does nothing but
waste time, so there's no reason to try to find a lower value that still works.
For reference on my system:

    # Ran 909 tests, 116 skipped, 119 failed.
    python hash seed: 2052473208

    real    151m44.322s
    user    0m0.077s
    sys     0m0.046s

[1] I thought that I wrote a bug for this, but search isn't finding it.

# txnutil.py - transaction related utilities
#
#  Copyright FUJIWARA Katsunori <[e-mail]> and others
#
# 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 annotations

from . import encoding


def mayhavepending(root):
    """return whether 'root' may have pending changes, which are
    visible to this process.
    """
    return root == encoding.environ.get(b'HG_PENDING')


def trypending(root, vfs, filename, **kwargs):
    """Open  file to be read according to HG_PENDING environment variable

    This opens '.pending' of specified 'filename' only when HG_PENDING
    is equal to 'root'.

    This returns '(fp, is_pending_opened)' tuple.
    """
    if mayhavepending(root):
        try:
            return (vfs(b'%s.pending' % filename, **kwargs), True)
        except FileNotFoundError:
            pass
    return (vfs(filename, **kwargs), False)