# as published by the Free Software Foundation; version 2

# of the License or (at your opinion) any later version of the license.

# 

# 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.

"""

Created on Feb 28, 2010

Mercurial repositories backup manager

@author: marcink

"""

import logging

import tarfile

import os

import datetime

import sys

import subprocess

logging.basicConfig(level=logging.DEBUG,

                    format="%(asctime)s %(levelname)-5.5s %(message)s")

class BackupManager(object):

    def __init__(self, repos_location, rsa_key, backup_server):

        today = datetime.datetime.now().weekday() + 1

        self.backup_file_name = "mercurial_repos.%s.tar.gz" % today

        self.id_rsa_path = self.get_id_rsa(rsa_key)

        self.repos_path = self.get_repos_path(repos_location)

        self.backup_server = backup_server

        self.backup_file_path = '/tmp'

        logging.info('starting backup for %s', self.repos_path)

        logging.info('backup target %s', self.backup_file_path)

    def get_id_rsa(self, rsa_key):

        if not os.path.isfile(rsa_key):

            logging.error('Could not load id_rsa key file in %s', rsa_key)

            sys.exit()

    def get_repos_path(self, path):

        if not os.path.isdir(path):

            logging.error('Wrong location for repositories in %s', path)

            sys.exit()

        return path

    def backup_repos(self):

        bckp_file = os.path.join(self.backup_file_path, self.backup_file_name)

        tar = tarfile.open(bckp_file, "w:gz")

        for dir_name in os.listdir(self.repos_path):

            logging.info('backing up %s', dir_name)

            tar.add(os.path.join(self.repos_path, dir_name), dir_name)

        tar.close()

        logging.info('finished backup of mercurial repositories')

    def transfer_files(self):

        params = {

                  'id_rsa_key': self.id_rsa_path,

                  'backup_file':os.path.join(self.backup_file_path,

                                             self.backup_file_name),

                  'backup_server':self.backup_server

                  }

        cmd = ['scp', '-l', '40000', '-i', '%(id_rsa_key)s' % params,

               '%(backup_file)s' % params,

               '%(backup_server)s' % params]

        subprocess.call(cmd)

        logging.info('Transfered file %s to %s', self.backup_file_name, cmd[4])

    def rm_file(self):

        logging.info('Removing file %s', self.backup_file_name)

        os.remove(os.path.join(self.backup_file_path, self.backup_file_name))

if __name__ == "__main__":

    repo_location = '/home/repo_path'

    backup_server = 'root@192.168.1.100:/backups/mercurial'

    rsa_key = '/home/id_rsa'

    B_MANAGER = BackupManager(repo_location, rsa_key, backup_server)

    B_MANAGER.backup_repos()