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import subprocess, os

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def GetAppRevision():

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    rev = None

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    app_dir=os.path.dirname(os.path.realpath(__file__))    

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    try:

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        pipe = subprocess.Popen(

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            ["hg", "id", "-i"],

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            stdout = subprocess.PIPE,

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            cwd = app_dir

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        )

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        rev = pipe.communicate()[0]

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        if pipe.returncode != 0:

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            rev = None

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    except:

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        pass

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    # if this is not mercurial repository

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    # try to read revision from file

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    if rev is None:

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        try:

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            f = open(os.path.join(app_dir,"revision"))

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            rev = f.readline()

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        except:

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            pass

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    return rev

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app_version =  "1.2"

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rev = GetAppRevision()

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if rev is not None:

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    app_version = app_version + "-" + rev.rstrip()

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