"""Be able to execute coverage.py by pointing Python at a working tree."""

import runpy, os

PKG = 'coverage'

try:
    run_globals = runpy.run_module(PKG, run_name='__main__', alter_sys=True)
    executed = os.path.splitext(os.path.basename(run_globals['__file__']))[0]
    if executed != '__main__':  # For Python 2.5 compatibility
        raise ImportError(
            'Incorrectly executed %s instead of __main__' % executed
            )
except ImportError:  # For Python 2.6 compatibility
    runpy.run_module('%s.__main__' % PKG, run_name='__main__', alter_sys=True)