I would like to add python-namespaces.eclass. This eclass will be used by a small number of special packages, which will provide Python namespaces. These packages will be used as dependencies of other packages already present in the tree.
Ebuilds using this eclass must set PYTHON_NAMESPACES variable before inheriting this eclass. Example (from net-zope/namespaces-zope): PYTHON_NAMESPACES="Products Shared Shared.DC five +zope zope.app" This eclass provides 3 public functions: python-namespaces_src_install() python-namespaces_pkg_postinst() python-namespaces_pkg_postrm() -- Arfrever Frehtes Taifersar Arahesis
# Copyright 1999-2011 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $
# @ECLASS: python-namespaces.eclass
# @MAINTAINER:
# Gentoo Python Project <pyt...@gentoo.org>
# @BLURB: Eclass for packages installing Python namespaces
# @DESCRIPTION:
# The python-namespaces eclass defines phase functions for packages installing
Python namespaces.
if ! has "${EAPI:-0}" 4; then
die "EAPI=\"${EAPI}\" not supported by python-namespaces.eclass"
fi
if [[ -z "${SUPPORT_PYTHON_ABIS}" ]]; then
die "python-namespaces.eclass cannot be used in ebuilds of packages not
supporting installation for multiple Python ABIs"
fi
if [[ -z "${PYTHON_NAMESPACES}" ]]; then
die "PYTHON_NAMESPACES variable not set"
fi
inherit python
#
================================================================================================
# ===================================== HANDLING OF METADATA
=====================================
#
================================================================================================
# @ECLASS-VARIABLE: PYTHON_NAMESPACES
# @REQUIRED
# @DESCRIPTION:
# Python namespaces.
# If given namespace is prepended with "+" or "-", then "+" or "-" is prepended
to corresponding
# USE flag in generated IUSE.
_python-namespaces_set_metadata() {
local namespace parent_namespace
_PYTHON_NAMESPACES=""
_PYTHON_NAMESPACES_COUNT="0"
for namespace in ${PYTHON_NAMESPACES}; do
_PYTHON_NAMESPACES+="${_PYTHON_NAMESPACES:+ }${namespace#[+-]}"
((_PYTHON_NAMESPACES_COUNT++))
done
DESCRIPTION="Python namespaces: ${_PYTHON_NAMESPACES// /, }"
HOMEPAGE="http://www.gentoo.org/";
SRC_URI=""
LICENSE="public-domain"
SLOT="0"
if [[ "${_PYTHON_NAMESPACES_COUNT}" -ge 2 ]]; then
IUSE="${PYTHON_NAMESPACES//./-}"
REQUIRED_USE="|| ( ${_PYTHON_NAMESPACES//./-} )"
for namespace in ${_PYTHON_NAMESPACES}; do
if [[ "${namespace}" == *.* ]]; then
parent_namespace="${namespace%.*}"
REQUIRED_USE+=" ${namespace//./-}? (
${parent_namespace//./-} )"
fi
done
else
IUSE=""
REQUIRED_USE=""
fi
S="${WORKDIR}"
}
_python-namespaces_set_metadata
unset -f _python-namespaces_set_metadata
#
================================================================================================
# ======================================= PHASE FUNCTIONS
========================================
#
================================================================================================
EXPORT_FUNCTIONS src_install pkg_postinst pkg_postrm
_python-namespaces_get_enabled_namespaces() {
local namespace
if [[ "${_PYTHON_NAMESPACES_COUNT}" -ge 2 ]]; then
for namespace in ${_PYTHON_NAMESPACES}; do
if use ${namespace//./-}; then
echo ${namespace}
fi
done
else
echo ${_PYTHON_NAMESPACES}
fi
}
# @FUNCTION: python-namespaces_src_install
# @DESCRIPTION:
# Implementation of src_install() phase. This function is exported.
# This function installs __init__.py modules corresponding to Python namespaces.
python-namespaces_src_install() {
if [[ "${EBUILD_PHASE}" != "install" ]]; then
die "${FUNCNAME}() can be used only in src_install() phase"
fi
_python_check_python_pkg_setup_execution
if [[ "$#" -ne 0 ]]; then
die "${FUNCNAME}() does not accept arguments"
fi
python-namespaces_installation() {
local namespace
for namespace in $(_python-namespaces_get_enabled_namespaces);
do
dodir $(python_get_sitedir)/${namespace//.//} || return
1
echo \
"try:
import pkg_resources
pkg_resources.declare_namespace(__name__)
try:
del pkg_resources
except NameError:
pass
except ImportError:
import pkgutil
__path__ = pkgutil.extend_path(__path__, __name__)
del pkgutil" >
"${ED}$(python_get_sitedir)/${namespace//.//}/__init__.py" || return 1
done
}
python_execute_function \
--action-message 'Installation of Python namespaces with
$(python_get_implementation) $(python_get_version)' \
--failure-message 'Installation of Python namespaces with
$(python_get_implementation) $(python_get_version) failed' \
python-namespaces_installation
unset -f python-namespaces_installation
}
# @FUNCTION: python-namespaces_pkg_postinst
# @DESCRIPTION:
# Implementation of pkg_postinst() phase. This function is exported.
# This function calls python_mod_optimize() with __init__.py modules
corresponding to Python namespaces.
python-namespaces_pkg_postinst() {
if [[ "${EBUILD_PHASE}" != "postinst" ]]; then
die "${FUNCNAME}() can be used only in pkg_postinst() phase"
fi
_python_check_python_pkg_setup_execution
if [[ "$#" -ne 0 ]]; then
die "${FUNCNAME}() does not accept arguments"
fi
python_mod_optimize $(for namespace in
$(_python-namespaces_get_enabled_namespaces); do echo
${namespace//.//}/__init__.py; done)
}
# @FUNCTION: python-namespaces_pkg_postrm
# @DESCRIPTION:
# Implementation of pkg_postrm() phase. This function is exported.
# This function calls python_mod_cleanup() with __init__.py modules
corresponding to Python namespaces.
python-namespaces_pkg_postrm() {
if [[ "${EBUILD_PHASE}" != "postrm" ]]; then
die "${FUNCNAME}() can be used only in pkg_postrm() phase"
fi
_python_check_python_pkg_setup_execution
if [[ "$#" -ne 0 ]]; then
die "${FUNCNAME}() does not accept arguments"
fi
python_mod_cleanup $(for namespace in
$(_python-namespaces_get_enabled_namespaces); do echo
${namespace//.//}/__init__.py; done)
}
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