cmake +python27 has nonexistent dependencies

[ryandesign (Ryan Carsten Schmidt)]

​https://build.macports.org/builders/jobs-mirror/builds/240336/steps/mirror/logs/stdio

--->  Fetching distfiles for cmake
Error: No such port: py27-sphinxcontrib-applehelp
Error: No such port: py27-sphinxcontrib-devhelp
Error: No such port: py27-sphinxcontrib-htmlhelp
Error: No such port: py27-sphinxcontrib-jsmath
Error: No such port: py27-sphinxcontrib-qthelp
Error: No such port: py27-sphinxcontrib-serializinghtml

[jmroot (Joshua Root)]

Also, it doesn't create the docs variant unless some python variant or the docs variant itself is selected. So it's likely that a user would never discover that +docs even exists. And if they somehow did:

% port info cmake +docs    
Error: cmake: Error executing docs: can't read "PYTHON_VERSION_WITH_DOT": no such variable
Error: Unable to open port: Error evaluating variants

[rubendibattista (Ruben Di Battista)]

Ehi @jmroot,

shouldn't this commit have addressed the error at least?

I'll check on the docs variant not being created.

Sorry for having introduced this bug.

[rubendibattista (Ruben Di Battista)]

Also @jmroot, what do you mean by "a user would never discover that +docs even exists"?

If I do: port info cmake

The docs variants is correctly listed. Am I missing something?

port info cmake
cmake @3.19.3 (devel)
Sub-ports:            cmake-devel
Variants:             docs, python27, python35, python36, python37, python38, (+)python39, qt5, universal

Description:          An extensible, open-source system that manages the build  process in an operating system and compiler independent manner.  Unlike many cross-platform systems, CMake is designed to be  used in conjunction with the
                      native build environment. The cmake release port is updated roughly every few months.
Homepage:             https://cmake.org

Build Dependencies:   py39-sphinx, py39-sphinxcontrib-applehelp, py39-sphinxcontrib-devhelp, py39-sphinxcontrib-htmlhelp, py39-sphinxcontrib-jsmath, py39-sphinxcontrib-qthelp, py39-sphinxcontrib-serializinghtml,
                      py39-sphinxcontrib-websupport
Library Dependencies: libcxx, curl, expat, zlib, bzip2, libarchive, ncurses, libuv
Platforms:            darwin, freebsd
License:              BSD
Maintainers:          Email: michaelld@macports.org, GitHub: michaelld

[rubendibattista (Ruben Di Battista)]

Anyway, since the missing dependencies are a lot for Python27. Should we drop the support altogether?

[jmroot (Joshua Root)]

You appear to have +python39 in variants.conf. Try removing it and look at the port info output.

[lukaso (Lukas Oberhuber)]

The python27 variant should definitely be removed as it is not building. Or fixed.

The workaround for now (if you are landing here) is:

sudo port install cmake -python27

[lukaso (Lukas Oberhuber)]

PR to fix this (dropping python27 support): ​https://github.com/macports/macports-ports/pull/16339

[lukaso (Lukas Oberhuber)]

In 1c0e2de71514900443b0a04d48c7fd18e6c53115/macports-ports (master):

cmake +python27: Does not build, so remove option

#62178

[michaelld (Michael Dickens)]

Thanks!