B Uvgi@sLddlmZddlZddlZddlmZmZddlmZddZ ddZ dS) )absolute_importN)pytomlsix)InstallationErrorcCst|totdd|DS)Ncss|]}t|tjVqdS)N) isinstancer string_types).0itemr 8/tmp/pip-install-r_9ig3yj/pip/pip/_internal/pyproject.py sz"_is_list_of_str..)rlistall)objr r r _is_list_of_str s rc CsLtj|}tj|}|rLtj|dd}t|}WdQRX|d}nd}|rn|sn|dkrhtdd}n8|rd|kr|dkrtd |dd}n |dkr|}|dk st |sdS|dkrd d gd d }|dk st d} d|krt| j |dd|d} t | st| j |dd|d} g} | dkrBd } d d g} | | | fS)aLoad 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 ) zutf-8)encodingNz build-systemFzIDisabling PEP 517 processing is invalid: project does not have a setup.pyTz build-backendzbDisabling PEP 517 processing is invalid: project specifies a build backend of {} in pyproject.tomlzsetuptools>=38.2.5wheelzsetuptools.build_meta)requiresz build-backendzO{package} has a pyproject.toml file that does not comply with PEP 518: {reason}rz]it has a 'build-system' table but not 'build-system.requires' which is mandatory in the table)packagereasonz1'build-system.requires' is not a list of strings.) ospathisfileioopenrloadgetrformatAssertionErrorr) use_pep517pyproject_tomlsetup_pyreq_name has_pyproject has_setupfpp_toml build_systemerror_templaterbackendcheckr r r load_pyproject_tomlsV            r+) __future__rrr pip._vendorrrpip._internal.exceptionsrrr+r r r r s