On Sun, 2021-01-24 at 10:16 -0500, Aisha Tammy wrote: > On 1/24/21 7:59 AM, Michał Górny wrote: > > Here's v2 with extra 'tl;dr' instructions in first para: > > > > ``` > > Title: Python preference to follow PYTHON_TARGETS > > Author: Michał Górny <[email protected]> > > Posted: 2021-01-24 > > Revision: 1 > > News-Item-Format: 2.0 > > > > On 2021-02-01 stable users will switch to a new method of updating > > the preferred Python versions that employs the configuration update > > mechanism in order to follow PYTHON_TARGETS. We will also deprecate > > and stop installing app-eselect/eselect-python by default. If you wish > > to use the newest Python version present in your PYTHON_TARGETS, you > > only have to accept configuration changes. If you wish need > > to customize the behavior, read on. > > > > Since 2017, /usr/bin/python and the related non-versioned symlinks > > are wrapped through dev-lang/python-exec. The list of preferred Python > > implementations is stored in /etc/python-exec/python-exec.conf and/or > > per-program /etc/python-exec/<basename>.conf configuration files. > > To preserve backwards compatibility, app-eselect/eselect-python remained > > a wrapper that updated this file. > > > > However, this mechanism alone has proven inconvenient to end users who > > had to update python-exec.conf whenever the default PYTHON_TARGETS > > changed. Thanks to the fallback logic, this was not a major problem > > for software installed via Gentoo packages that always ensure that > > a supported implementation is used. However, users have reported that > > whenever the preference for /usr/bin/python mismatched their > > PYTHON_TARGETS, their custom scripts would break due to unsatisfied > > dependencies. This does not follow the principle of least surprise. > > > > For this reason, we have decided to change the default python-exec > > configuration to match PYTHON_TARGETS by default, in the eclass > > preference order, that is from the newest CPython version to oldest, > > with alternative Python implementations coming afterwards. This change > > will be propagated via the configuration protection mechanism whenever > > dev-lang/python-exec-conf is installed or rebuilt due to PYTHON_TARGETS > > changes. This will permit the users to interactively confirm > > the updates. > > > > If the new default is not correct for you, please use your preferred > > configuration update tool to discard or edit the new configuration file. > > > > Furthermore, dev-lang/python will no longer attempt to automatically > > update the Python interpreter preference, or pull in eselect-python > > automatically. If you wish to continue using it, please install it > > manually to ensure that it is not unmerged. > > > > ``` > > > > Has this change already been pushed for unstable? I am running an unstable > system but I still have eselect-python, so I assume not (unless due to my side > error).
dev-lang/python-exec-conf is available in ~arch already but app- eselect/eselect-python is still pulled in unconditionally. -- Best regards, Michał Górny
