view hg @ 45329:dc10bcd5c08d

templater: start passing resource to read from into _readmapfile()

This patch makes it so we pass in a file-like resource to read from
instead of having `_readmapfile()` open the file. This is one more
step towards making `_readmapfile()` able to read resources opened by
from `importlib.resources`. We still need to pass in the mapfile path
because it's used for loading dependent mapfiles from `%include` and
`__base__`, and it's also used for giving the user better error
messages. Besides that, one can safely call `_readmapfile()` with any
file-like resource after this patch.

Differential Revision: https://phab.mercurial-scm.org/D8891

#!/usr/bin/env python
#
# mercurial - scalable distributed SCM
#
# Copyright 2005-2007 Matt Mackall <[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

import os
import sys

libdir = '@LIBDIR@'

if libdir != '@' 'LIBDIR' '@':
    if not os.path.isabs(libdir):
        libdir = os.path.join(
            os.path.dirname(os.path.realpath(__file__)), libdir
        )
        libdir = os.path.abspath(libdir)
    sys.path.insert(0, libdir)

from hgdemandimport import tracing

with tracing.log('hg script'):
    # enable importing on demand to reduce startup time
    try:
        if sys.version_info[0] < 3 or sys.version_info >= (3, 6):
            import hgdemandimport

            hgdemandimport.enable()
    except ImportError:
        sys.stderr.write(
            "abort: couldn't find mercurial libraries in [%s]\n"
            % ' '.join(sys.path)
        )
        sys.stderr.write("(check your install and PYTHONPATH)\n")
        sys.exit(-1)

    from mercurial import dispatch

    dispatch.run()