view mercurial/stack.py @ 45308: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

# stack.py - Mercurial functions for stack definition
#
#  Copyright Matt Mackall <[e-mail]> and other
#
# 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


def getstack(repo, rev=None):
    """return a sorted smartrev of the stack containing either rev if it is
    not None or the current working directory parent.

    The stack will always contain all drafts changesets which are ancestors to
    the revision and are not merges.
    """
    if rev is None:
        rev = b'.'

    revspec = b'only(%s) and not public() and not ::merge()'
    revisions = repo.revs(revspec, rev)
    revisions.sort()
    return revisions