Re: [gentoo-dev] python-distutils-ng.eclass: allow useflag dependencies for python

["Michał Górny" <mgorny@gentoo.org>]

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On Thu, 06 Sep 2012 22:44:34 +0200
hasufell <hasufell@gentoo.org> wrote:

> --- python-distutils-ng.eclass
> +++ python-distutils-ng.eclass
> @@ -59,6 +59,25 @@
>  # Set to any value to disable automatic reinstallation of scripts in
> bin # directories. See python-distutils-ng_src_install function.
>  
> +# @ECLASS-VARIABLE: PYTHON_USE
> +# @DEFAULT_UNSET
> +# @DESCRIPTION:
> +# comma seperated list of useflags needed for python
> +# this is directly substituted into dev-lang/python[${PYTHON_USE}]
> thus allowing +# all valid useflag dependencies
> +# example 1: PYTHON_USE="xml,sqlite"
> +# example 2: PYTHON_USE="xml?,threads?,-foo"
> +
> +# @ECLASS-VARIABLE: JYTHON_USE
> +# @DEFAULT_UNSET
> +# @DESCRIPTION:
> +# same as PYTHON_USE just for JYTHON
> +
> +# @ECLASS-VARIABLE: PYPY_USE
> +# @DEFAULT_UNSET
> +# @DESCRIPTION:
> +# same as PYTHON_USE just for PYPY
> +

Why I feel like we're close to PYTHON2_USE, PYTHON3_USE,
PYTHON3NG_USE...

>  EXPORT_FUNCTIONS src_prepare src_configure src_compile src_test
> src_install 
>  case "${EAPI}" in
> @@ -107,16 +126,22 @@
>  fi
>  unset required_use_str
>  
> +# avoid empty use deps
> +[[ -n ${PYTHON_USE} ]] && _PYTHON_USE="[${PYTHON_USE}]" ||
> _PYTHON_USE="" +[[ -n ${JYTHON_USE} ]] &&
> _JYTHON_USE="[${JYTHON_USE}]" || _JYTHON_USE="" +[[ -n ${PYPY_USE} ]]
> && _PYPY_USE="[${PYPY_USE}]" || _PYPY_USE="" +
> +# set python DEPEND and RDEPEND
>  for impl in ${PYTHON_COMPAT}; do
>  	IUSE+=" python_targets_${impl}"
>  	dep_str="${impl/_/.}"
>  	case "${dep_str}" in
>  		python?.?)
> -			dep_str="dev-lang/python:${dep_str: -3}" ;;
> +			dep_str="dev-lang/python:${dep_str:
> -3}${_PYTHON_USE}" ;; jython?.?)
> -			dep_str="dev-java/jython:${dep_str: -3}" ;;
> +			dep_str="dev-java/jython:${dep_str:
> -3}${_JYTHON_USE}" ;; pypy?.?)
> -			dep_str="dev-python/pypy:${dep_str: -3}" ;;
> +			dep_str="dev-python/pypy:${dep_str:
> -3}${_PYPY_USE}" ;; *)
>  			die "Unsupported implementation: ${impl}" ;;
>  	esac

I have to think more about this.

Where are your use cases?

-- 
Best regards,
Michał Górny

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