view mercurial/scmwindows.py @ 39697:98ca9078807a

localrepo: resolve store and cachevfs in makelocalrepository()

This is mostly a code move and refactor.

One change is that we now explicitly look for requirements indicating
a share is being used rather than blindly try to read from
.hg/sharedpath. Requirements *should* be all that is necessary to
dictate high-level behavior and I'm not sure why the previous code
was doing what it was.

The previous code has been in place since 87d1fd40f57e (authored in
2009). And the commit immediately after that (971e38a9344b) introduced
``hg.share()`` and always wrote the ``shared`` requirement. And as far
as I can tell, every revision of ``hg.share()`` since has written
either the ``shared`` or ``relshared`` requirement. So I'm pretty
sure we don't need to maintain BC by always looking for and honoring
the ``.hg/sharedpath`` file even if a requirement isn't present.

.. bc::

   A repository will no longer use shared storage if it has a
   ``.hg/sharedpath`` file but no entry in ``.hg/requires`` saying it
   is shared.

   This change should not have any end-user impact, as all shared
   repos should have a ``.hg/requires`` file indicating this.

Differential Revision: https://phab.mercurial-scm.org/D4573

from __future__ import absolute_import

import os

from . import (
    encoding,
    pycompat,
    util,
    win32,
)

try:
    import _winreg as winreg
    winreg.CloseKey
except ImportError:
    import winreg

# MS-DOS 'more' is the only pager available by default on Windows.
fallbackpager = 'more'

def systemrcpath():
    '''return default os-specific hgrc search path'''
    rcpath = []
    filename = win32.executablepath()
    # Use mercurial.ini found in directory with hg.exe
    progrc = os.path.join(os.path.dirname(filename), 'mercurial.ini')
    rcpath.append(progrc)
    # Use hgrc.d found in directory with hg.exe
    progrcd = os.path.join(os.path.dirname(filename), 'hgrc.d')
    if os.path.isdir(progrcd):
        for f, kind in util.listdir(progrcd):
            if f.endswith('.rc'):
                rcpath.append(os.path.join(progrcd, f))
    # else look for a system rcpath in the registry
    value = util.lookupreg('SOFTWARE\\Mercurial', None,
                           winreg.HKEY_LOCAL_MACHINE)
    if not isinstance(value, str) or not value:
        return rcpath
    value = util.localpath(value)
    for p in value.split(pycompat.ospathsep):
        if p.lower().endswith('mercurial.ini'):
            rcpath.append(p)
        elif os.path.isdir(p):
            for f, kind in util.listdir(p):
                if f.endswith('.rc'):
                    rcpath.append(os.path.join(p, f))
    return rcpath

def userrcpath():
    '''return os-specific hgrc search path to the user dir'''
    home = os.path.expanduser('~')
    path = [os.path.join(home, 'mercurial.ini'),
            os.path.join(home, '.hgrc')]
    userprofile = encoding.environ.get('USERPROFILE')
    if userprofile and userprofile != home:
        path.append(os.path.join(userprofile, 'mercurial.ini'))
        path.append(os.path.join(userprofile, '.hgrc'))
    return path

def termsize(ui):
    return win32.termsize()