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# Copyright 1999-2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=7
inherit python-utils-r1
DESCRIPTION="Python script wrapper"
HOMEPAGE="https://github.com/mgorny/python-exec/"
SRC_URI="https://github.com/mgorny/python-exec/releases/download/v${PV}/${P}.tar.bz2"
LICENSE="BSD-2"
SLOT="2"
KEYWORDS="~alpha amd64 arm arm64 hppa ~ia64 ~m68k ~mips ppc ppc64 ~riscv s390 sparc x86 ~x64-cygwin ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
# Internal Python project hack. Do not copy it. Ever.
IUSE="${_PYTHON_ALL_IMPLS[@]/#/python_targets_}"
RDEPEND="!<=dev-lang/python-2.7.18-r3:2.7"
src_configure() {
local pyimpls=() i EPYTHON
for i in "${_PYTHON_ALL_IMPLS[@]}"; do
if use "python_targets_${i}"; then
_python_export "${i}" EPYTHON
pyimpls+=( "${EPYTHON}" )
fi
done
local myconf=(
--with-fallback-path="${EPREFIX}/usr/local/sbin:${EPREFIX}/usr/local/bin:${EPREFIX}/usr/sbin:${EPREFIX}/usr/bin:${EPREFIX}/sbin:${EPREFIX}/bin"
--with-python-impls="${pyimpls[*]}"
)
econf "${myconf[@]}"
}
src_install() {
default
# Prepare and own the template
insinto /etc/python-exec
newins - python-exec.conf \
< <(sed -n -e '/^#/p' config/python-exec.conf.example)
local programs=( python python3 )
local scripts=( python-config python3-config 2to3 idle pydoc pyvenv )
local f
for f in "${programs[@]}"; do
# symlink the C wrapper for python to avoid shebang recursion
# bug #568974
dosym python-exec2c /usr/bin/"${f}"
done
for f in "${scripts[@]}"; do
# those are python scripts (except for new python-configs)
# so symlink them via the python wrapper
dosym ../lib/python-exec/python-exec2 /usr/bin/"${f}"
done
}
pkg_preinst() {
if [[ -e ${EROOT}/etc/python-exec/python-exec.conf ]]; then
# preserve current configuration
cp "${EROOT}"/etc/python-exec/python-exec.conf \
"${ED}"/etc/python-exec/python-exec.conf || die
else
# preserve previous Python version preference
local py old_pythons=()
local config_base=${EROOT}/etc/env.d/python
# start with the 'global' preference (2 vs 3)
if [[ -f ${config_base}/config ]]; then
old_pythons+=( "$(<${config_base}/config)" )
fi
# then try specific py3 selection
for py in 3; do
local target=
if [[ -f ${config_base}/python${py} ]]; then
# try the newer config files
target=$(<${config_base}/python${py})
elif [[ -L ${EROOT}/usr/bin/python${py} ]]; then
# check the older symlink format
target=$(readlink "${EROOT}/usr/bin/python${py}")
# check if it's actually old eselect symlink
[[ ${target} == python?.? ]] || target=
fi
# add the extra target if found and != global
if [[ ${target} && ${old_pythons[0]} != ${target} ]]; then
old_pythons+=( "${target}" )
fi
done
if [[ ${old_pythons[@]} ]]; then
elog "You seem to have just upgraded into the new version of python-exec"
elog "that uses python-exec.conf for configuration. The ebuild has attempted"
elog "to convert your previous configuration to the new format, resulting"
elog "in the following preferences (most preferred version first):"
elog
for py in "${old_pythons[@]}"; do
elog " ${py}"
done
elog
elog "Those interpreters will be preferred when running Python scripts or"
elog "calling wrapped Python executables (python, python2, pydoc...)."
elog "If none of the preferred interpreters are supported, python-exec will"
elog "fall back to the newest supported Python version."
elog
elog "Please note that due to the ambiguous character of the old settings,"
elog "you may want to modify the preference list yourself. In order to do so,"
elog "open the following file in your favorite editor:"
elog
elog " ${EROOT}/etc/python-exec/python-exec.conf"
elog
elog "For more information on the new configuration format, please read"
elog "the comment on top of the installed configuration file."
local IFS=$'\n'
echo "${old_pythons[*]}" \
>> "${ED}"/etc/python-exec/python-exec.conf || die
fi
fi
}
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