#!/usr/bin/env python
# ex:ts=4:sw=4:sts=4:et
# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
"""
BitBake Parsers

File parsers for the BitBake build tools.

Copyright (C) 2003, 2004  Chris Larson
Copyright (C) 2003, 2004  Phil Blundell

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.

This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA.

Based on functions from the base bb module, Copyright 2003 Holger Schurig
"""
__version__ = '1.0'

__all__ = [ 'handlers', 'supports', 'handle', 'init', 'ConfHandler', 'BBHandler', 'ParseError' ]
handlers = []

class ParseError(Exception):
    """Exception raised when parsing fails"""

class SkipPackage(Exception):
    """Exception raised to skip this package"""

import ConfHandler
ConfHandler.ParseError = ParseError
import BBHandler
BBHandler.ParseError = ParseError

__mtime_cache = {}

def cached_mtime(f):
    import os
    if not __mtime_cache.has_key(f):
        __mtime_cache[f] = os.stat(f)[8]
    return __mtime_cache[f]

def mark_dependency(d, f):
    import bb, os
    if f.startswith('./'):
        f = "%s/%s" % (os.getcwd(), f[2:])
    deps = (bb.data.getVar('__depends', d) or "").split()
    deps.append("%s@%s" % (f, cached_mtime(f)))
    bb.data.setVar('__depends', " ".join(deps), d)

def supports(fn, data):
    """Returns true if we have a handler for this file, false otherwise"""
    for h in handlers:
        if h['supports'](fn, data):
            return 1
    return 0

def handle(fn, data, include = 0):
    """Call the handler that is appropriate for this file"""
    for h in handlers:
        if h['supports'](fn, data):
            return h['handle'](fn, data, include)
    return None

def init(fn, data):
    for h in handlers:
        if h['supports'](fn):
            return h['init'](data)