contrib/win32/hg.bat

localrepo: move some vfs initialization out of __init__

In order to make repository types more dynamic, we'll need to move the
logic for determining repository behavior out of
localrepository.__init__ so we can influence behavior before the type
is instantiated.

This commit starts that process by moving working directory and .hg/
vfs initialization to our new standalone function for instantiating
local repositories.

Aside from API changes, behavior should be fully backwards compatible.

.. api::

   localrepository.__init__ now does less work and accepts new args

   Use ``hg.repository()``, ``localrepo.instance()``, or
   ``localrepo.makelocalrepository()`` to obtain a new local repository
   instance instead of calling the ``localrepository`` constructor
   directly.

Differential Revision: https://phab.mercurial-scm.org/D4564

@echo off
rem Windows Driver script for Mercurial

setlocal
set HG=%~f0

rem Use a full path to Python (relative to this script) if it exists,
rem as the standard Python install does not put python.exe on the PATH...
rem Otherwise, expect that python.exe can be found on the PATH.
rem %~dp0 is the directory of this script

if exist "%~dp0..\python.exe" (
    "%~dp0..\python" "%~dp0hg" %*
) else (
    python "%~dp0hg" %*
)
endlocal

exit /b %ERRORLEVEL%