#!/usr/bin/env python
# vim: tabstop=4 shiftwidth=4 softtabstop=4

# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# Copyright 2011 OpenStack LLC.
# All Rights Reserved.
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

"""
Advance the version of this build
"""

import os
import sys
from time import strftime

# Determine version of this application.
PKG = "barbican"
VERSIONFILE = os.path.join(PKG, "version.py") 
CHANGEFILE = os.path.join("debian", "changelog")
current_dir = os.getcwd()
if current_dir.endswith('bin'):
    VERSIONFILE = os.path.join("..", PKG, "version.py")
    CHANGEFILE = os.path.joih("..", "debian", "changelog") 

def get_version():
    version = "unknown"
    try: 
        version_file = open(VERSIONFILE, "r")
        for line in version_file:
            if line.startswith('__version__'):
                version = line.split("'")[1]
                break
    except EnvironmentError:
        pass # Okay, there is no version file.
    return version

def bump_version(version):
    subs = version.split(".")
    last_index = len(subs) - 1
    last_no_dev = subs[last_index]
    if 'dev' in last_no_dev:
        last_no_dev = last_no_dev[:-3]
    last_bumped = int(last_no_dev) + 1
    subs[last_index] = str(last_bumped) + 'dev'
    return '.'.join(subs)
         
def update_versionfile(version):
    temp_name = VERSIONFILE + "~"
    file_new = open(temp_name, 'w')
    try:
        with open(VERSIONFILE, 'r') as file_old:
            for line in file_old:
                if line.startswith('__version__'):
                    subs = line.split("'")
                    subs[1] = version
                    file_new.write("'".join(subs))
                else:
                    file_new.write(line)
    finally:
        file_new.close()
        os.rename(temp_name, VERSIONFILE)

def update_changefile(version):
    temp_name = CHANGEFILE + "~"
    file_new = open(temp_name, 'w')
    try:
        with open(CHANGEFILE, 'r') as file_old:
            for line in file_old:
                if line.startswith(PKG):
                    new_version_line = PKG + " (" + version + "-1) stable; urgency=high\n"
                    file_new.write(new_version_line)
                elif 'john.wood' in line:
                    now_text = strftime("%a, %d %b %Y %H:%M:%S %z")
                    new_commiter_line = " -- John Wood <john.wood@rackspace.com>  " + now_text + "\n"
                    file_new.write(new_commiter_line)
                else:
                    file_new.write(line)
    finally:
        file_new.close()
        os.rename(temp_name, CHANGEFILE)

if __name__ == '__main__':
    version = get_version()
    if version:
        next = bump_version(version)
        print 'version: ', version
        print 'next ver: ', next
        update_versionfile(next)
        update_changefile(next)