view mercurial/scmwindows.py @ 47643:11f834e7177d

pyoxidizer: add hooks to inject extra python packages and install files

We need this type of hook to inject our internal extension and resource files
at Google. Presumably this could be useful to others, so instead of trying to
carry an internal patch we've done this in a modular way that should be of
value upstream.

I'm extremely puzzled by the behavior of glob() on Windows, and I'll
be filing at least one (probably two) bugs upstream about it.

Differential Revision: https://phab.mercurial-scm.org/D11092

from __future__ import absolute_import

import os

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

try:
    import _winreg as winreg  # pytype: disable=import-error

    winreg.CloseKey
except ImportError:
    # py2 only
    import winreg  # pytype: disable=import-error

# MS-DOS 'more' is the only pager available by default on Windows.
fallbackpager = b'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), b'mercurial.ini')
    rcpath.append(progrc)

    def _processdir(progrcd):
        if os.path.isdir(progrcd):
            for f, kind in sorted(util.listdir(progrcd)):
                if f.endswith(b'.rc'):
                    rcpath.append(os.path.join(progrcd, f))

    # Use hgrc.d found in directory with hg.exe
    _processdir(os.path.join(os.path.dirname(filename), b'hgrc.d'))

    # treat a PROGRAMDATA directory as equivalent to /etc/mercurial
    programdata = encoding.environ.get(b'PROGRAMDATA')
    if programdata:
        programdata = os.path.join(programdata, b'Mercurial')
        _processdir(os.path.join(programdata, b'hgrc.d'))

        ini = os.path.join(programdata, b'mercurial.ini')
        if os.path.isfile(ini):
            rcpath.append(ini)

        ini = os.path.join(programdata, b'hgrc')
        if os.path.isfile(ini):
            rcpath.append(ini)

    # next look for a system rcpath in the registry
    value = util.lookupreg(
        b'SOFTWARE\\Mercurial', None, winreg.HKEY_LOCAL_MACHINE
    )
    if value and isinstance(value, bytes):
        value = util.localpath(value)
        for p in value.split(pycompat.ospathsep):
            if p.lower().endswith(b'mercurial.ini'):
                rcpath.append(p)
            else:
                _processdir(p)
    return rcpath


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


def _legacy_expanduser(path):
    """Expand ~ and ~user constructs in the pre 3.8 style"""

    # Python 3.8+ changed the expansion of '~' from HOME to USERPROFILE.  See
    # https://bugs.python.org/issue36264.  It also seems to capitalize the drive
    # letter, as though it was processed through os.path.realpath().
    if not path.startswith(b'~'):
        return path

    i, n = 1, len(path)
    while i < n and path[i] not in b'\\/':
        i += 1

    if b'HOME' in encoding.environ:
        userhome = encoding.environ[b'HOME']
    elif b'USERPROFILE' in encoding.environ:
        userhome = encoding.environ[b'USERPROFILE']
    elif b'HOMEPATH' not in encoding.environ:
        return path
    else:
        try:
            drive = encoding.environ[b'HOMEDRIVE']
        except KeyError:
            drive = b''
        userhome = os.path.join(drive, encoding.environ[b'HOMEPATH'])

    if i != 1:  # ~user
        userhome = os.path.join(os.path.dirname(userhome), path[1:i])

    return userhome + path[i:]


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