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isinstancer   Ústring_types)Ú.0Úitem© r   ú;/tmp/pip-unpacked-wheel-8u7dkzi1/pip/_internal/pyproject.pyÚ	<genexpr>   s     z"_is_list_of_str.<locals>.<genexpr>)r   ÚlistÚall)Úobjr   r   r   Ú_is_list_of_str   s    
þr   c                 C   s2   t j | d¡}tjr.t|tjƒr.| t 	¡ ¡}|S )Nzpyproject.toml)
ÚosÚpathÚjoinr   ÚPY2r   Ú	text_typeÚencodeÚsysÚgetfilesystemencoding)Úunpacked_source_directoryr   r   r   r   Úmake_pyproject_path   s    r!   ÚBuildSystemDetailsÚrequiresÚbackendÚcheckÚbackend_pathc              
   C   s®  t j |¡}t j |¡}|rLtj|dd��}t |¡}W 5 Q R X | d¡}nd}|rr|sr| dk	rl| sltdƒ‚d} n<|r¢d|kr¢| dk	rœ| sœtd 	|d ¡ƒ‚d} n| dkr®|} | dk	sºt
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|||ƒS )aB  Load the pyproject.toml file.

    Parameters:
        use_pep517 - Has the user requested PEP 517 processing? None
                     means the user hasn't explicitly specified.
        pyproject_toml - Location of the project's pyproject.toml file
        setup_py - Location of the project's setup.py file
        req_name - The name of the requirement we're processing (for
                   error reporting)

    Returns:
        None if we should use the legacy code path, otherwise a tuple
        (
            requirements from pyproject.toml,
            name of PEP 517 backend,
            requirements we should check are installed after setting
                up the build environment
            directory paths to import the backend from (backend-path),
                relative to the project root.
        )
    zutf-8)Úencodingzbuild-systemNzIDisabling PEP 517 processing is invalid: project does not have a setup.pyTúbuild-backendzbDisabling PEP 517 processing is invalid: project specifies a build backend of {} in pyproject.tomlzsetuptools>=40.8.0Úwheelz setuptools.build_meta:__legacy__)r#   r(   zO{package} has a pyproject.toml file that does not comply with PEP 518: {reason}r#   z]it has a 'build-system' table but not 'build-system.requires' which is mandatory in the table)ÚpackageÚreasonz1'build-system.requires' is not a list of strings.z='build-system.requires' contains an invalid requirement: {!r}zbackend-path)r   r   ÚisfileÚioÚopenr   ÚloadÚgetr   ÚformatÚAssertionErrorr   r   r   r"   )Ú
use_pep517Úpyproject_tomlÚsetup_pyÚreq_nameÚhas_pyprojectÚ	has_setupÚfÚpp_tomlÚbuild_systemÚerror_templater#   Úrequirementr$   r&   r%   r   r   r   Úload_pyproject_toml*   s€    ÿýÿ
þ	ÿ
ÿÿ
þÿýÿ


r>   )Ú
__future__r   r-   r   r   Úcollectionsr   Úpip._vendorr   r   Ú"pip._vendor.packaging.requirementsr   r   Úpip._internal.exceptionsr   Úpip._internal.utils.typingr	   Útypingr
   r   r   r   r!   r"   r>   r   r   r   r   Ú<module>   s&      ÿ