Bug 426768

Summary:	python-distutils-ng.eclass: add something like python.eclass's PYTHON_USE_WITH
Product:	Gentoo Linux	Reporter:	Alexandre Rostovtsev (RETIRED) <tetromino>
Component:	Eclasses	Assignee:	Python Gentoo Team <python>
Status:	RESOLVED FIXED
Severity:	enhancement	CC:	mgorny
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	python-distutils-ng.eclass.patch python-distutils-ng.eclass.patch

Description Alexandre Rostovtsev (RETIRED) gentoo-dev

2012-07-16 00:53:02 UTC

Suppose that I am writing an ebuild for a python package that needs elementtree. It therefore needs to depend on python[xml] for every slot of python - so if I use python-distutils-ng.eclass, I need to explicitly write something like

RDEPEND="python_targets_python2_5? ( dev-lang/python:2.5[xml] )
	python_targets_python2_6? ( dev-lang/python:2.6[xml] )
	python_targets_python2_7? ( dev-lang/python:2.7[xml] )
	python_targets_python3_1? ( dev-lang/python:3.1[xml] )
	python_targets_python3_2? ( dev-lang/python:3.2[xml] )"

which really is terribly ugly.

I suggest that python-distutils-ng.eclass add something like the PYTHON_USE_WITH/PYTHON_USE_WITH_OPT mechanism in python.eclass to automate such dependency declarations on python implementations.

Comment 1 Julian Ospald 2012-09-24 19:36:23 UTC

Created attachment 324868 [details, diff]
python-distutils-ng.eclass.patch

discussed on dev-ml

If no one comes up with a better idea I would like to apply it.

Comment 2 Alexandre Rostovtsev (RETIRED) gentoo-dev

2012-09-25 01:50:42 UTC

(In reply to comment #1)

That should work.

Comment 3 Julian Ospald 2012-09-26 11:30:34 UTC

Created attachment 325020 [details, diff]
python-distutils-ng.eclass.patch

after some discussion it seems the python herd would like to drop jython and pypy variables, so we have only one and handle the flag-difference inside the implementations via fake-flags

Comment 4 Julian Ospald 2012-09-26 12:08:16 UTC

+  26 Sep 2012; Julian Ospald <hasufell@gentoo.org> python-distutils-ng.eclass:
+  add PYTHON_USE wrt #426768


# @ECLASS-VARIABLE: PYTHON_USE
# @DEFAULT_UNSET
# @DESCRIPTION:
# Comma-separated list of useflags needed for all(!) allowed
# implementations. This is directly substituted into one or more of
# dev-lang/python[${PYTHON_USE}], dev-python/pypy[${PYTHON_USE}] and
# dev-java/jython[${PYTHON_USE}].
# @CODE
# example 1: PYTHON_USE="xml,sqlite"
# example 2: PYTHON_USE="xml?,threads?,-foo"
# @CODE