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#    This file is part of the Minecraft Overviewer.
#
#    Minecraft Overviewer is free software: you can redistribute it and/or
#    modify it under the terms of the GNU General Public License as published
#    by the Free Software Foundation, either version 3 of the License, or (at
#    your option) any later version.
#
#    Minecraft Overviewer 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 the Overviewer.  If not, see <http://www.gnu.org/licenses/>.

"""
Misc utility routines used by multiple files that don't belong anywhere else
"""

import imp
import os
import os.path
import sys
from subprocess import Popen, PIPE

def get_program_path():
    if hasattr(sys, "frozen") or imp.is_frozen("__main__"):
        return os.path.dirname(sys.executable)
    else:
        try:
            # normally, we're in ./overviewer_core/util.py
            # we want ./
            return os.path.dirname(os.path.dirname(__file__))
        except NameError:
            return os.path.dirname(sys.argv[0])


# does not require git, very likely to work everywhere
def findGitHash():
    this_dir = get_program_path()
    if os.path.exists(os.path.join(this_dir,".git")):
        with_ = open(os.path.join(this_dir,".git","HEAD"))
        data_ = with_.read().strip()
        if data_.startswith("ref: "):
            if not os.path.exists(os.path.join(this_dir, ".git", data[5:])):
                return data
            with_ = open(os.path.join(this_dir, ".git", data[5:]))
            return with_.read().strip()
        else:
            return data
    else:
        try:
            import overviewer_version
            return overviewer_version.HASH
        except:
            return "unknown"

def findGitVersion():
    try:
        p = Popen(['git', 'describe', '--tags'], stdout=PIPE, stderr=PIPE)
        p.stderr.close()
        line = p.stdout.readlines()[0]
        if line.startswith('release-'):
            line = line.split('-', 1)[1]
        # turn 0.1.2-50-somehash into 0.1.2-50
        # and 0.1.3 into 0.1.3
        line = '-'.join(line.split('-', 2)[:2])
        return line.strip()
    except:
        try:
            import overviewer_version
            return overviewer_version.VERSION
        except:
            return "unknown"

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# python setup.py build
Traceback (most recent call last):
  File "setup.py", line 120, in <module>
    setup_kwargs['package_data'] = {'overviewer_core': recursive_package_data('data/textures') + recursive_package_data('data/web_assets')}
  File "setup.py", line 83, in recursive_package_data
    current_path = os.path.relpath(dirpath, package_dir)
AttributeError: 'module' object has no attribute 'relpath'

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# python overviewer.py
overviewer.py:69: Warning: 'with' will become a reserved keyword in Python 2.6
  File "overviewer.py", line 69
    with open(os.path.join(this_dir, "overviewer_core", "src", "overviewer.h")) as f:
            ^
SyntaxError: invalid syntax

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This program requires:

    Python 2.6 or 2.7 <http://python.org/download/>
    PIL (Python Imaging Library) <http://www.pythonware.com/products/pil/>
    Numpy <http://scipy.org/Download>
    Either the Minecraft client installed, or a terrain.png file. See the Textures section below.
    A C compiler.