Re: [gentoo-dev] Python-3.2-related changes

[Arfrever Frehtes Taifersar Arahesis <Arfrever@gentoo.org>]

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Arfrever Frehtes Taifersar Arahesis
2010-02-05 17:40:00  napisał(a):
> The following changes should be made in ebuilds of packages supporting only Python 2:
> - Dependency on Python 2 should be set correctly. You can specify it directly in
>   {,R}DEPEND or use PYTHON_DEPEND.
> 
>     Example:
>       PYTHON_DEPEND="2"
> 
>       inherit python
> 
> - Miscellaneous actions should be executed with correct version of Python.
> 
>   - In ebuilds of packages supporting installation for multiple versions of Python,
>     please remember to disable installation for all versions of Python 3.
>     (Please do not use python_set_active_version() in ebuilds of these packages.)
> 
>     Example:
>       RESTRICT_PYTHON_ABIS="3.*"
> 
>   - In ebuilds of packages not supporting installation for multiple versions of Python,
>     set active version of Python using python_set_active_version().
>     (Please avoid passing precisely specified Python ABI to python_set_active_version().)
> 
>     Example:
>       pkg_setup() {
>           python_set_active_version 2
>       }
> 
>     (If given package currently cannot be installed for multiple versions of Python,
>     but it is theoretically possible (e.g. this package installs .py files into
>     /usr/lib/pythonX.Y/site-packages and does not install any non-versioned libraries
>     into /usr/lib), then please try to adjust ebuilds of this package to allow
>     installation for multiple versions of Python.)

I forgot about 2 other types of changes:
- Shebangs in installed scripts should be correct. If build system installs scripts
  with too generic shebangs (e.g. '#!/usr/bin/python'), then you can use
  python_convert_shebangs() to convert shebangs.

  Example:
    src_install() {
        ...

        python_convert_shebangs -r 2 "${D}usr/bin"
    }

  (Please note that wrapper scripts generated by python_generate_wrapper_scripts() work
  with all versions of Python from 2.4 to 3.2, so shebangs in these scripts do not need
  any changes.)

- Some deprecated functions (python_version(), distutils_python_version()) and variables
  (${python}, ${PYVER} etc.) should not be used.

Documentation [1] has been updated.

I will start filing bugs maybe in this week.

[1] http://www.gentoo.org/proj/en/Python/developersguide.xml

-- 
Arfrever Frehtes Taifersar Arahesis

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