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mgorny |
1.5 |
# Copyright 1999-2013 Gentoo Foundation
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mgorny |
1.1 |
# Distributed under the terms of the GNU General Public License v2
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mgorny |
1.5 |
# $Header: /var/cvsroot/gentoo-x86/eclass/python-any-r1.eclass,v 1.4 2012/12/24 02:51:25 zmedico Exp $
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mgorny |
1.1 |
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# @ECLASS: python-any-r1
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# @MAINTAINER:
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mgorny |
1.5 |
# Python team <python@gentoo.org>
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mgorny |
1.1 |
# @AUTHOR:
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# Author: Michał Górny <mgorny@gentoo.org>
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# Based on work of: Krzysztof Pawlik <nelchael@gentoo.org>
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# @BLURB: An eclass for packages having build-time dependency on Python.
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# @DESCRIPTION:
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# A minimal eclass for packages which need any Python interpreter
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# installed without a need for explicit choice and invariability.
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# This usually involves packages requiring Python at build-time
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# but having no other relevance to it.
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#
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# This eclass provides a minimal PYTHON_DEPS variable with a dependency
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# string on any of the supported Python implementations. It also exports
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# pkg_setup() which finds the best supported implementation and sets it
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# as the active one.
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#
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# Please note that python-any-r1 will always inherit python-utils-r1
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# as well. Thus, all the functions defined there can be used in the
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# packages using python-any-r1, and there is no need ever to inherit
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# both.
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#
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# For more information, please see the python-r1 Developer's Guide:
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# http://www.gentoo.org/proj/en/Python/python-r1/dev-guide.xml
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case "${EAPI:-0}" in
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0|1|2|3|4|5)
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# EAPI=4 needed by python-r1
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;;
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*)
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die "Unsupported EAPI=${EAPI} (unknown) for ${ECLASS}"
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;;
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esac
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if [[ ! ${_PYTHON_ANY_R1} ]]; then
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if [[ ${_PYTHON_R1} ]]; then
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die 'python-any-r1.eclass can not be used with python-r1.eclass.'
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elif [[ ${_PYTHON_SINGLE_R1} ]]; then
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die 'python-any-r1.eclass can not be used with python-single-r1.eclass.'
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fi
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inherit python-utils-r1
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fi
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EXPORT_FUNCTIONS pkg_setup
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if [[ ! ${_PYTHON_ANY_R1} ]]; then
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# @ECLASS-VARIABLE: PYTHON_COMPAT
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# @REQUIRED
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# @DESCRIPTION:
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# This variable contains a list of Python implementations the package
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# supports. It must be set before the `inherit' call. It has to be
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# an array.
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#
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# Example:
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# @CODE
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# PYTHON_COMPAT=( python{2_5,2_6,2_7} )
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# @CODE
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if ! declare -p PYTHON_COMPAT &>/dev/null; then
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die 'PYTHON_COMPAT not declared.'
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fi
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# @ECLASS-VARIABLE: PYTHON_REQ_USE
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# @DEFAULT_UNSET
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# @DESCRIPTION:
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# The list of USEflags required to be enabled on the Python
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# implementations, formed as a USE-dependency string. It should be valid
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# for all implementations in PYTHON_COMPAT, so it may be necessary to
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# use USE defaults.
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#
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# Example:
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# @CODE
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# PYTHON_REQ_USE="gdbm,ncurses(-)?"
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# @CODE
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#
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# It will cause the Python dependencies to look like:
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# @CODE
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# || ( dev-lang/python:X.Y[gdbm,ncurses(-)?] ... )
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# @CODE
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# @ECLASS-VARIABLE: PYTHON_DEPS
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# @DESCRIPTION:
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# This is an eclass-generated Python dependency string for all
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# implementations listed in PYTHON_COMPAT.
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#
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# Any of the supported interpreters will satisfy the dependency.
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#
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# Example use:
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# @CODE
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# DEPEND="${RDEPEND}
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# ${PYTHON_DEPS}"
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# @CODE
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#
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# Example value:
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# @CODE
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# || ( dev-lang/python:2.7[gdbm]
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# dev-lang/python:2.6[gdbm] )
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# @CODE
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_python_build_set_globals() {
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local usestr
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[[ ${PYTHON_REQ_USE} ]] && usestr="[${PYTHON_REQ_USE}]"
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PYTHON_DEPS=
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local i
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for i in "${_PYTHON_ALL_IMPLS[@]}"; do
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if has "${i}" "${PYTHON_COMPAT[@]}"
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then
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local d
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case ${i} in
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python*)
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d='dev-lang/python';;
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jython*)
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d='dev-java/jython';;
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pypy*)
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d='dev-python/pypy';;
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*)
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die "Invalid implementation: ${i}"
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esac
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local v=${i##*[a-z]}
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PYTHON_DEPS="${d}:${v/_/.}${usestr} ${PYTHON_DEPS}"
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fi
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done
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PYTHON_DEPS="|| ( ${PYTHON_DEPS})"
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}
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_python_build_set_globals
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mgorny |
1.2 |
# @FUNCTION: _python_impl_supported
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# @USAGE: <epython>
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# @INTERNAL
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# @DESCRIPTION:
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# Check whether the specified implementation is supported by package
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# (specified in PYTHON_COMPAT).
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_python_impl_supported() {
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debug-print-function ${FUNCNAME} "${@}"
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local i=${1/./_}
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case "${i}" in
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python*|jython*)
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;;
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pypy-c*)
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i=${i/-c/}
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;;
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*)
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ewarn "Invalid EPYTHON: ${EPYTHON}"
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;;
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esac
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if has "${i}" "${PYTHON_COMPAT[@]}"; then
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return 0
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elif ! has "${i}" "${_PYTHON_ALL_IMPLS[@]}"; then
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ewarn "Invalid EPYTHON: ${EPYTHON}"
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fi
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return 1
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}
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mgorny |
1.1 |
# @FUNCTION: python-any-r1_pkg_setup
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# @DESCRIPTION:
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# Determine what the best installed (and supported) Python
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# implementation is and set EPYTHON and PYTHON accordingly.
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python-any-r1_pkg_setup() {
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debug-print-function ${FUNCNAME} "${@}"
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mgorny |
1.2 |
# first, try ${EPYTHON}... maybe it's good enough for us.
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if [[ ${EPYTHON} ]]; then
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if _python_impl_supported "${EPYTHON}"; then
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python_export EPYTHON PYTHON
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return
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fi
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fi
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# then, try eselect-python
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local variant i
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for variant in '' '--python2' '--python3'; do
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i=$(eselect python --show ${variant} 2>/dev/null)
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if [[ ! ${i} ]]; then
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# no eselect-python?
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break
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elif _python_impl_supported "${i}"; then
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python_export "${i}" EPYTHON PYTHON
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return
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fi
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done
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# fallback to best installed impl.
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local rev_impls=()
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mgorny |
1.1 |
for i in "${_PYTHON_ALL_IMPLS[@]}"; do
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if has "${i}" "${PYTHON_COMPAT[@]}"; then
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rev_impls=( "${i}" "${rev_impls[@]}" )
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fi
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done
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mgorny |
1.3 |
local PYTHON_PKG_DEP
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mgorny |
1.1 |
for i in "${rev_impls[@]}"; do
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mgorny |
1.3 |
python_export "${i}" PYTHON_PKG_DEP EPYTHON PYTHON
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zmedico |
1.4 |
ROOT=/ has_version "${PYTHON_PKG_DEP}" && return
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mgorny |
1.3 |
done
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mgorny |
1.1 |
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mgorny |
1.3 |
die $EPYTHON
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mgorny |
1.1 |
}
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_PYTHON_ANY_R1=1
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fi
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