#!/usr/bin/env python

# Copyright (c) 2008, Willow Garage, Inc.
# All rights reserved.
# 
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
# 
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in the
#       documentation and/or other materials provided with the distribution.
#     * Neither the name of the Willow Garage, Inc. nor the names of its
#       contributors may be used to endorse or promote products derived from
#       this software without specific prior written permission.
# 
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.

# This tool is a place-holder for a future version inspection system.

from __future__ import print_function

USAGE = "Usage: rosversion <stack> or rosversion -d"

import os
import sys
import re
import roslib.stacks

def get_source_version(text):
    for l in text.split('\n'):
        if l.strip().startswith('rosbuild_make_distribution'):
            x_re = re.compile(r'[()]')
            lsplit = x_re.split(l.strip())
            if len(lsplit) < 2:
                raise Exception("couldn't find version number in CMakeLists.txt:\n\n%s"%l)
            return lsplit[1]
    raise Exception("could not locate version number in stack CMakeLists.txt")
    
if len(sys.argv) == 2:
    stack_name = sys.argv[1]

    if stack_name == '-d' or stack_name == '--distro':
        print('electric')
        sys.exit(0)
    
    try:
        d = roslib.stacks.get_stack_dir(stack_name)
    except Exception as e:
        sys.stderr.write(str(e)+'\n')
        sys.exit(1)

    cmake_p = os.path.join(d, 'CMakeLists.txt')
    if not os.path.isfile(cmake_p):
        print('<unversioned>')
    else:
        with open(cmake_p) as f:
            text = f.read()
        try:
            print(get_source_version(text))
        except Exception as e:
            sys.stderr.write(str(e)+'\n')
            sys.exit(1)
else:
    sys.stderr.write(USAGE+'\n')
    sys.exit(os.EX_USAGE)
