# ex:ts=4:sw=4:sts=4:et
# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
"""
BitBake 'Fetch' implementations

Classes for obtaining upstream sources for the
BitBake build tools.

"""

# Copyright (C) 2003, 2004  Chris Larson
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# 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.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Based on functions from the base bb module, Copyright 2003 Holger Schurig

import os
import bb
from   bb import data
from   bb.fetch import Fetch
from   bb.fetch import FetchError
from   bb.fetch import encodeurl, decodeurl
from   bb.fetch import runfetchcmd

class Wget(Fetch):
    """Class to fetch urls via 'wget'"""
    def supports(self, url, ud, d):
        """
        Check to see if a given url can be fetched with wget.
        """
        return ud.type in ['http', 'https', 'ftp']

    def localpath(self, url, ud, d):

        url = encodeurl([ud.type, ud.host, ud.path, ud.user, ud.pswd, {}])
        ud.basename = os.path.basename(ud.path)
        ud.localfile = data.expand(os.path.basename(url), d)

        return os.path.join(data.getVar("DL_DIR", d, True), ud.localfile)

    def go(self, uri, ud, d, checkonly = False):
        """Fetch urls"""

        def fetch_uri(uri, ud, d):
            if checkonly:
                fetchcmd = data.getVar("CHECKCOMMAND", d, 1)
            elif os.path.exists(ud.localpath):
                # file exists, but we didnt complete it.. trying again..
                fetchcmd = data.getVar("RESUMECOMMAND", d, 1)
            else:
                fetchcmd = data.getVar("FETCHCOMMAND", d, 1)

            uri = uri.split(";")[0]
            uri_decoded = list(decodeurl(uri))
            uri_type = uri_decoded[0]
            uri_host = uri_decoded[1]

            fetchcmd = fetchcmd.replace("${URI}", uri.split(";")[0])
            fetchcmd = fetchcmd.replace("${FILE}", ud.basename)

            bb.msg.note(1, bb.msg.domain.Fetcher, "fetch " + uri)
            bb.msg.debug(2, bb.msg.domain.Fetcher, "executing " + fetchcmd)
            runfetchcmd(fetchcmd, d)

            # Sanity check since wget can pretend it succeed when it didn't
            # Also, this used to happen if sourceforge sent us to the mirror page
            if not os.path.exists(ud.localpath) and not checkonly:
                bb.msg.debug(2, bb.msg.domain.Fetcher, "The fetch command for %s returned success but %s doesn't exist?..." % (uri, ud.localpath))
                return False

            return True

        localdata = data.createCopy(d)
        data.setVar('OVERRIDES', "wget:" + data.getVar('OVERRIDES', localdata), localdata)
        data.update_data(localdata)

        if fetch_uri(uri, ud, localdata):
            return True

        raise FetchError(uri)


    def checkstatus(self, uri, ud, d):
        return self.go(uri, ud, d, True)
