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|
# Copyright 1999-2015 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id$
# @ECLASS: python-single-r1
# @MAINTAINER:
# Python team <python@gentoo.org>
# @AUTHOR:
# Author: Michał Górny <mgorny@gentoo.org>
# Based on work of: Krzysztof Pawlik <nelchael@gentoo.org>
# @BLURB: An eclass for Python packages not installed for multiple implementations.
# @DESCRIPTION:
# An extension of the python-r1 eclass suite for packages which
# don't support being installed for multiple Python implementations.
# This mostly includes tools embedding Python.
#
# This eclass extends the IUSE and REQUIRED_USE set by python-r1
# to request the PYTHON_SINGLE_TARGET when the inheriting ebuild
# can be supported by more than one Python implementation. It also
# replaces PYTHON_USEDEP and PYTHON_DEPS with a more suitable form.
#
# Please note that packages support multiple Python implementations
# (using python-r1 eclass) can not depend on packages not supporting
# them (using this eclass).
#
# Please note that python-single-r1 will always inherit python-utils-r1
# as well. Thus, all the functions defined there can be used
# in the packages using python-single-r1, and there is no need ever
# to inherit both.
#
# For more information, please see the wiki:
# https://wiki.gentoo.org/wiki/Project:Python/python-single-r1
case "${EAPI:-0}" in
0|1|2|3)
die "Unsupported EAPI=${EAPI:-0} (too old) for ${ECLASS}"
;;
4)
# EAPI=4 is only allowed on legacy packages
if [[ ${CATEGORY}/${P} == app-arch/threadzip-1.2 ]]; then
:
elif [[ ${CATEGORY}/${P} == media-libs/lv2-1.8.0 ]]; then
:
elif [[ ${CATEGORY}/${P} == media-libs/lv2-1.10.0 ]]; then
:
elif [[ ${CATEGORY}/${P} == sys-apps/paludis-1* ]]; then
:
elif [[ ${CATEGORY}/${P} == sys-apps/paludis-2.[02].0 ]]; then
:
elif [[ ${CATEGORY}/${P} == sys-apps/util-linux-2.2[456]* ]]; then
:
elif [[ ${CATEGORY}/${P} == */gdb-7.[78]* ]]; then
:
else
die "Unsupported EAPI=${EAPI:-4} (too old, allowed only on restricted set of packages) for ${ECLASS}"
fi
;;
5)
# EAPI=5 is required for sane USE_EXPAND dependencies
;;
*)
die "Unsupported EAPI=${EAPI} (unknown) for ${ECLASS}"
;;
esac
if [[ ! ${_PYTHON_SINGLE_R1} ]]; then
if [[ ${_PYTHON_R1} ]]; then
die 'python-single-r1.eclass can not be used with python-r1.eclass.'
elif [[ ${_PYTHON_ANY_R1} ]]; then
die 'python-single-r1.eclass can not be used with python-any-r1.eclass.'
fi
inherit python-utils-r1
fi
EXPORT_FUNCTIONS pkg_setup
if [[ ! ${_PYTHON_SINGLE_R1} ]]; then
# @ECLASS-VARIABLE: PYTHON_COMPAT
# @REQUIRED
# @DESCRIPTION:
# This variable contains a list of Python implementations the package
# supports. It must be set before the `inherit' call. It has to be
# an array.
#
# Example:
# @CODE
# PYTHON_COMPAT=( python{2_5,2_6,2_7} )
# @CODE
if ! declare -p PYTHON_COMPAT &>/dev/null; then
die 'PYTHON_COMPAT not declared.'
fi
# @ECLASS-VARIABLE: PYTHON_REQ_USE
# @DEFAULT_UNSET
# @DESCRIPTION:
# The list of USEflags required to be enabled on the chosen Python
# implementations, formed as a USE-dependency string. It should be valid
# for all implementations in PYTHON_COMPAT, so it may be necessary to
# use USE defaults.
#
# This should be set before calling `inherit'.
#
# Example:
# @CODE
# PYTHON_REQ_USE="gdbm,ncurses(-)?"
# @CODE
#
# It will cause the Python dependencies to look like:
# @CODE
# python_single_target_pythonX_Y? ( dev-lang/python:X.Y[gdbm,ncurses(-)?] )
# @CODE
# @ECLASS-VARIABLE: PYTHON_DEPS
# @DESCRIPTION:
# This is an eclass-generated Python dependency string for all
# implementations listed in PYTHON_COMPAT.
#
# The dependency string is conditional on PYTHON_SINGLE_TARGET.
#
# Example use:
# @CODE
# RDEPEND="${PYTHON_DEPS}
# dev-foo/mydep"
# DEPEND="${RDEPEND}"
# @CODE
#
# Example value:
# @CODE
# dev-lang/python-exec:=
# python_single_target_python2_6? ( dev-lang/python:2.6[gdbm] )
# python_single_target_python2_7? ( dev-lang/python:2.7[gdbm] )
# @CODE
# @ECLASS-VARIABLE: PYTHON_USEDEP
# @DESCRIPTION:
# This is an eclass-generated USE-dependency string which can be used to
# depend on another Python package being built for the same Python
# implementations.
#
# The generate USE-flag list is compatible with packages using python-r1,
# python-single-r1 and python-distutils-ng eclasses. It must not be used
# on packages using python.eclass.
#
# Example use:
# @CODE
# RDEPEND="dev-python/foo[${PYTHON_USEDEP}]"
# @CODE
#
# Example value:
# @CODE
# python_targets_python2_7(-)?,python_single_target_python2_7(+)?
# @CODE
# @ECLASS-VARIABLE: PYTHON_REQUIRED_USE
# @DESCRIPTION:
# This is an eclass-generated required-use expression which ensures the following
# when more than one python implementation is possible:
# 1. Exactly one PYTHON_SINGLE_TARGET value has been enabled.
# 2. The selected PYTHON_SINGLE_TARGET value is enabled in PYTHON_TARGETS.
#
# This expression should be utilized in an ebuild by including it in
# REQUIRED_USE, optionally behind a use flag.
#
# Example use:
# @CODE
# REQUIRED_USE="python? ( ${PYTHON_REQUIRED_USE} )"
# @CODE
#
# Example value:
# @CODE
# python_single_target_python2_6? ( python_targets_python2_6 )
# python_single_target_python2_7? ( python_targets_python2_7 )
# ^^ ( python_single_target_python2_6 python_single_target_python2_7 )
# @CODE
_python_single_set_globals() {
local impls=()
local unimpls=()
PYTHON_DEPS=
local i PYTHON_PKG_DEP
for i in "${_PYTHON_ALL_IMPLS[@]}"; do
has "${i}" "${PYTHON_COMPAT[@]}" \
&& impls+=( "${i}" ) \
|| unimpls+=( "${i}" )
done
if [[ ${#impls[@]} -eq 0 ]]; then
die "No supported implementation in PYTHON_COMPAT."
fi
local flags_mt=( "${impls[@]/#/python_targets_}" )
local flags=( "${impls[@]/#/python_single_target_}" )
local unflags=( "${unimpls[@]/#/-python_single_target_}" )
local optflags=${flags_mt[@]/%/(-)?},${unflags[@]/%/(-)}
IUSE="${flags_mt[*]}"
if [[ ${#impls[@]} -eq 1 ]]; then
# There is only one supported implementation; set IUSE and other
# variables without PYTHON_SINGLE_TARGET.
PYTHON_REQUIRED_USE="${flags_mt[*]}"
python_export "${impls[0]}" PYTHON_PKG_DEP
PYTHON_DEPS="${PYTHON_PKG_DEP} "
# Force on the python_single_target_* flag for this impl, so
# that any dependencies that inherit python-single-r1 and
# happen to have multiple implementations will still need
# to bound by the implementation used by this package.
optflags+=,${flags[0]/%/(+)}
else
# Multiple supported implementations; honor PYTHON_SINGLE_TARGET.
IUSE+=" ${flags[*]}"
PYTHON_REQUIRED_USE="^^ ( ${flags[*]} )"
# Ensure deps honor the same python_single_target_* flag as is set
# on this package.
optflags+=,${flags[@]/%/(+)?}
for i in "${impls[@]}"; do
# The chosen targets need to be in PYTHON_TARGETS as well.
# This is in order to enforce correct dependencies on packages
# supporting multiple implementations.
PYTHON_REQUIRED_USE+=" python_single_target_${i}? ( python_targets_${i} )"
python_export "${i}" PYTHON_PKG_DEP
PYTHON_DEPS+="python_single_target_${i}? ( ${PYTHON_PKG_DEP} ) "
done
fi
PYTHON_USEDEP=${optflags// /,}
# 1) well, python-exec would suffice as an RDEP
# but no point in making this overcomplex, BDEP doesn't hurt anyone
# 2) python-exec should be built with all targets forced anyway
# but if new targets were added, we may need to force a rebuild
# 3) use whichever python-exec slot installed in EAPI 5. For EAPI 4,
# just fix :2 since := deps are not supported.
if [[ ${_PYTHON_WANT_PYTHON_EXEC2} == 0 ]]; then
die "python-exec:0 is no longer supported, please fix your ebuild to work with python-exec:2"
elif [[ ${EAPI} != 4 ]]; then
PYTHON_DEPS+=">=dev-lang/python-exec-2:=[${PYTHON_USEDEP}]"
else
PYTHON_DEPS+="dev-lang/python-exec:2[${PYTHON_USEDEP}]"
fi
}
_python_single_set_globals
# @FUNCTION: python_gen_usedep
# @USAGE: <pattern> [...]
# @DESCRIPTION:
# Output a USE dependency string for Python implementations which
# are both in PYTHON_COMPAT and match any of the patterns passed
# as parameters to the function.
#
# Remember to escape or quote the patterns to prevent shell filename
# expansion.
#
# When all implementations are requested, please use ${PYTHON_USEDEP}
# instead. Please also remember to set an appropriate REQUIRED_USE
# to avoid ineffective USE flags.
#
# Example:
# @CODE
# PYTHON_COMPAT=( python{2_7,3_4} )
# DEPEND="doc? ( dev-python/epydoc[$(python_gen_usedep 'python2*')] )"
# @CODE
#
# It will cause the dependency to look like:
# @CODE
# DEPEND="doc? ( dev-python/epydoc[python_targets_python2_7(-)?,...] )"
# @CODE
python_gen_usedep() {
debug-print-function ${FUNCNAME} "${@}"
local impl pattern
local matches=()
for impl in "${PYTHON_COMPAT[@]}"; do
_python_impl_supported "${impl}" || continue
for pattern; do
if [[ ${impl} == ${pattern} ]]; then
matches+=(
"python_targets_${impl}(-)?"
"python_single_target_${impl}(+)?"
)
break
fi
done
done
[[ ${matches[@]} ]] || die "No supported implementations match python_gen_usedep patterns: ${@}"
local out=${matches[@]}
echo "${out// /,}"
}
# @FUNCTION: python_gen_useflags
# @USAGE: <pattern> [...]
# @DESCRIPTION:
# Output a list of USE flags for Python implementations which
# are both in PYTHON_COMPAT and match any of the patterns passed
# as parameters to the function.
#
# Example:
# @CODE
# PYTHON_COMPAT=( python{2_7,3_4} )
# REQUIRED_USE="doc? ( ^^ ( $(python_gen_useflags 'python2*') ) )"
# @CODE
#
# It will cause the variable to look like:
# @CODE
# REQUIRED_USE="doc? ( ^^ ( python_single_target_python2_7 ) )"
# @CODE
python_gen_useflags() {
debug-print-function ${FUNCNAME} "${@}"
local impl pattern
local matches=()
for impl in "${PYTHON_COMPAT[@]}"; do
_python_impl_supported "${impl}" || continue
for pattern; do
if [[ ${impl} == ${pattern} ]]; then
matches+=( "python_single_target_${impl}" )
break
fi
done
done
echo "${matches[@]}"
}
# @FUNCTION: python_gen_cond_dep
# @USAGE: <dependency> <pattern> [...]
# @DESCRIPTION:
# Output a list of <dependency>-ies made conditional to USE flags
# of Python implementations which are both in PYTHON_COMPAT and match
# any of the patterns passed as the remaining parameters.
#
# In order to enforce USE constraints on the packages, verbatim
# '${PYTHON_USEDEP}' (quoted!) may be placed in the dependency
# specification. It will get expanded within the function into a proper
# USE dependency string.
#
# Example:
# @CODE
# PYTHON_COMPAT=( python{2_5,2_6,2_7} )
# RDEPEND="$(python_gen_cond_dep \
# 'dev-python/unittest2[${PYTHON_USEDEP}]' python{2_5,2_6})"
# @CODE
#
# It will cause the variable to look like:
# @CODE
# RDEPEND="python_single_target_python2_5? (
# dev-python/unittest2[python_targets_python2_5(-)?,...] )
# python_single_target_python2_6? (
# dev-python/unittest2[python_targets_python2_6(-)?,...] )"
# @CODE
python_gen_cond_dep() {
debug-print-function ${FUNCNAME} "${@}"
local impl pattern
local matches=()
local dep=${1}
shift
for impl in "${PYTHON_COMPAT[@]}"; do
_python_impl_supported "${impl}" || continue
for pattern; do
if [[ ${impl} == ${pattern} ]]; then
# substitute ${PYTHON_USEDEP} if used
# (since python_gen_usedep() will not return ${PYTHON_USEDEP}
# the code is run at most once)
if [[ ${dep} == *'${PYTHON_USEDEP}'* ]]; then
local PYTHON_USEDEP=$(python_gen_usedep "${@}")
dep=${dep//\$\{PYTHON_USEDEP\}/${PYTHON_USEDEP}}
fi
matches+=( "python_single_target_${impl}? ( ${dep} )" )
break
fi
done
done
echo "${matches[@]}"
}
# @FUNCTION: python_setup
# @DESCRIPTION:
# Determine what the selected Python implementation is and set
# the Python build environment up for it.
python_setup() {
debug-print-function ${FUNCNAME} "${@}"
unset EPYTHON
local impl impls=()
for impl in "${PYTHON_COMPAT[@]}"; do
_python_impl_supported "${impl}" || continue
impls+=( "${impl}" )
done
if [[ ${#impls[@]} -eq 1 ]]; then
if use "python_targets_${impls[0]}"; then
# Only one supported implementation, enable it explicitly
python_export "${impls[0]}" EPYTHON PYTHON
python_wrapper_setup
fi
else
for impl in "${impls[@]}"; do
if use "python_single_target_${impl}"; then
if [[ ${EPYTHON} ]]; then
eerror "Your PYTHON_SINGLE_TARGET setting lists more than a single Python"
eerror "implementation. Please set it to just one value. If you need"
eerror "to override the value for a single package, please use package.env"
eerror "or an equivalent solution (man 5 portage)."
echo
die "More than one implementation in PYTHON_SINGLE_TARGET."
fi
if ! use "python_targets_${impl}"; then
eerror "The implementation chosen as PYTHON_SINGLE_TARGET must be added"
eerror "to PYTHON_TARGETS as well. This is in order to ensure that"
eerror "dependencies are satisfied correctly. We're sorry"
eerror "for the inconvenience."
echo
die "Build target (${impl}) not in PYTHON_TARGETS."
fi
python_export "${impl}" EPYTHON PYTHON
python_wrapper_setup
fi
done
fi
if [[ ! ${EPYTHON} ]]; then
eerror "No Python implementation selected for the build. Please set"
if [[ ${#impls[@]} -eq 1 ]]; then
eerror "the PYTHON_TARGETS variable in your make.conf to include one"
else
eerror "the PYTHON_SINGLE_TARGET variable in your make.conf to one"
fi
eerror "of the following values:"
eerror
eerror "${impls[@]}"
echo
die "No supported Python implementation in PYTHON_SINGLE_TARGET/PYTHON_TARGETS."
fi
}
# @FUNCTION: python-single-r1_pkg_setup
# @DESCRIPTION:
# Runs python_setup.
python-single-r1_pkg_setup() {
debug-print-function ${FUNCNAME} "${@}"
[[ ${MERGE_TYPE} != binary ]] && python_setup
}
_PYTHON_SINGLE_R1=1
fi
|