cmake @3.13.1_0+docs+python27 failing to build

[kateyalatalo (Dr. Katherine Alatalo)]

OS information

version:1
:debug:sysinfo macOS 10.13 (darwin/17.7.0) arch i386
:debug:sysinfo MacPorts 2.5.4
:debug:sysinfo Xcode 10.1
:debug:sysinfo SDK 10.13
:debug:sysinfo MACOSX_DEPLOYMENT_TARGET: 10.13

Log is attached.

[kateyalatalo (Dr. Katherine Alatalo)]

Error log output by file

[jmroot (Joshua Root)]

:info:build Traceback (most recent call last):
723	:info:build   File "/opt/local/bin/sphinx-build-2.7", line 6, in <module>
724	:info:build     from pkg_resources import load_entry_point
725	:info:build   File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3126, in <module>
726	:info:build     @_call_aside
727	:info:build   File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3110, in _call_aside
728	:info:build     f(*args, **kwargs)
729	:info:build   File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3139, in _initialize_master_working_set
730	:info:build     working_set = WorkingSet._build_master()
731	:info:build   File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pkg_resources/__init__.py", line 583, in _build_master
732	:info:build     return cls._build_from_requirements(__requires__)
733	:info:build   File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pkg_resources/__init__.py", line 596, in _build_from_requirements
734	:info:build     dists = ws.resolve(reqs, Environment())
735	:info:build   File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pkg_resources/__init__.py", line 784, in resolve
736	:info:build     raise DistributionNotFound(req, requirers)
737	:info:build pkg_resources.DistributionNotFound: The 'idna<2.8,>=2.5' distribution was not found and is required by requests

Dupe of #57747.

[mf2k (Frank Schima)]

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