# sparse.py - functionality for sparse checkouts

#

# Copyright 2014 Facebook, Inc.

#

# 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

from .i18n import _

from . import (

    error,

)

# Whether sparse features are enabled. This variable is intended to be

# temporary to facilitate porting sparse to core. It should eventually be

# a per-repo option, possibly a repo requirement.

enabled = False

def parseconfig(ui, raw):

    """Parse sparse config file content.

    Returns a tuple of includes, excludes, and profiles.

    """

    includes = set()

    excludes = set()

    current = includes

    profiles = []

    for line in raw.split('\n'):

        line = line.strip()

        if not line or line.startswith('#'):

            # empty or comment line, skip

            continue

        elif line.startswith('%include '):

            line = line[9:].strip()

            if line:

                profiles.append(line)

        elif line == '[include]':

            if current != includes:

                # TODO pass filename into this API so we can report it.

                raise error.Abort(_('sparse config cannot have includes ' +

                                    'after excludes'))

            continue

        elif line == '[exclude]':

            current = excludes

        elif line:

            if line.strip().startswith('/'):

                ui.warn(_('warning: sparse profile cannot use' +

                          ' paths starting with /, ignoring %s\n') % line)

                continue

            current.add(line)

    return includes, excludes, profiles

# Exists as separate function to facilitate monkeypatching.

def readprofile(repo, profile, changeid):

    """Resolve the raw content of a sparse profile file."""

    # TODO add some kind of cache here because this incurs a manifest

    # resolve and can be slow.

    return repo.filectx(profile, changeid=changeid).data()