# Copyright (C) 2012 Canonical Ltd.

# Copyright (C) 2012 Hewlett-Packard Development Company, L.P.

# Copyright (C) 2012 Yahoo! Inc.

#

# Author: Scott Moser <scott.moser@canonical.com>

# Author: Juerg Haefliger <juerg.haefliger@hp.com>

# Author: Joshua Harlow <harlowja@yahoo-inc.com>

#

# This file is part of cloud-init. See LICENSE file for license information.

import os

from cloudinit import handlers

from cloudinit import log as logging

from cloudinit import subp

from cloudinit import util

from cloudinit.settings import (PER_ALWAYS)

LOG = logging.getLogger(__name__)

class BootHookPartHandler(handlers.Handler):

    # The content prefixes this handler understands.

    prefixes = ['#cloud-boothook']

    def __init__(self, paths, datasource, **_kwargs):

        handlers.Handler.__init__(self, PER_ALWAYS)

        self.boothook_dir = paths.get_ipath("boothooks")

        self.instance_id = None

        if datasource:

            self.instance_id = datasource.get_instance_id()

    def _write_part(self, payload, filename):

        filename = util.clean_filename(filename)

        filepath = os.path.join(self.boothook_dir, filename)

        contents = util.strip_prefix_suffix(util.dos2unix(payload),

                                            prefix=self.prefixes[0])

        util.write_file(filepath, contents.lstrip(), 0o700)

        return filepath

    def handle_part(self, data, ctype, filename, payload, frequency):

        if ctype in handlers.CONTENT_SIGNALS:

            return

        filepath = self._write_part(payload, filename)

        try:

            env = os.environ.copy()

            if self.instance_id is not None:

                env['INSTANCE_ID'] = str(self.instance_id)

            subp.subp([filepath], env=env)

        except subp.ProcessExecutionError:

            util.logexc(LOG, "Boothooks script %s execution error", filepath)

        except Exception:

            util.logexc(LOG, "Boothooks unknown error when running %s",

                        filepath)

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