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Utilities for dealing with the compilation of modules and creation
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stModuleCompiler eases running of the module compiler.

    The ModuleCompiler class encapsulates running the commandline
    module compiler (checkmodule) and module packager (semodule_package).
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    Several options are controlled via paramaters (only effects the 
    non-refpol builds):
    
     .mls          [boolean] Generate an MLS module (by passed -M to
                   checkmodule). True to generate an MLS module, false
                   otherwise.
                   
     .module       [boolean] Generate a module instead of a base module.
                   True to generate a module, false to generate a base.
                   
     .checkmodule  [string] Fully qualified path to the module compiler.
                   Default is /usr/bin/checkmodule.
                   
     .semodule_package [string] Fully qualified path to the module
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     .output       [file object] File object used to write verbose
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�|_d|_dS(s�Create a ModuleCompiler instance, optionally with an
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cCsg|jd�}t|�dkr3td|��ndj|dd!�}|d}|d}||fS(s�Generate the module and policy package filenames from
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cCs\|r|j|�nB|j|�\}}|j||�|j||�tj|�dS(s�Create a module package saved in a packagename from a
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        The create_module_package creates a module package saved in a
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        should contain SELinux policy statements appropriate for a
        base or non-base module (depending on the setting of .module).

        Only file names are accepted, not open file objects or
        descriptors because the command line SELinux tools are used.

        On error a RuntimeError will be raised with a descriptive
        error message.
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