mercurial/posix.py

16382:f542d291c4f2

        return None

    if os.sep in command:
        return findexisting(command)

    for path in os.environ.get('PATH', '').split(os.pathsep):
        executable = findexisting(os.path.join(path, command))
        if executable is not None:
            return executable
    return None

16383:f5dd179bfa4a

        return None

    if os.sep in command:
        return findexisting(command)

    if sys.platform == 'plan9':
        return findexisting(os.path.join('/bin', command))

    for path in os.environ.get('PATH', '').split(os.pathsep):
        executable = findexisting(os.path.join(path, command))
        if executable is not None:
            return executable
    return None