Request for feedback: %pycached macro for %files section

[Miro Hrončok]

Hello,

we are considering to add a %pycached macro to be used in the %files section:

https://src.fedoraproject.org/rpms/python-rpm-macros/pull-request/37

We'd like to receive feedback. We plan to add it to rawhide and backport it to 
all Fedoras + EPEL7+.

Usage:

   %files
   ...
   %pycached %{python3_sitelib}/foo.py

This will list:

   /usr/lib/python3.8/site-packages/foo.py
   /usr/lib/python3.8/site-packages/__pycache__/foo.cpython-38{,.opt-?}.pyc

Assuming the Python 3 version is 3.8.
The bytecode files are globbed, their presence is not checked.

This will fail:

   %pycached %{python3_sitelib}/foo

error: %pycached can only be used with paths explicitly ending with .py

And so will any of this:

   %pycached %{python3_sitelib}/*
   %pycached %{python3_sitelib}/foo.*
   %pycached %{python3_sitelib}/foo.p?
   %pycached %{python3_sitelib}/foo.?y
   %pycached %{python3_sitelib}/foo.??

But this will work:

   %pycached %{python3_sitelib}/foo*.py

And it will generate the following globs:

   /usr/lib/python3.8/site-packages/foo*.py
   /usr/lib/python3.8/site-packages/__pycache__/foo*.cpython-38{,.opt-?}.pyc

When used with paths that include Python 3 version, it globs with the version:

   %pycached /opt/python3.10/foo.py

Generates:

   /opt/python3.10/foo.py
   /opt/python3.10/__pycache__/foo.cpython-310{,.opt-?}.pyc

While paths without version have less strict globs:

   %pycached /custom/foo.py
   /custom/foo.py
   /custom/__pycache__/foo.cpython-3*{,.opt-?}.pyc

This will generate a warning in RPM build:

warning: File listed twice: /custom/__pycache__/foo.cpython-38.opt-1.pyc

However it ensures the optimized bytecode is there.

-- 
Miro Hrončok
--
Phone: [phone]
IRC: mhroncok