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# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
# @ECLASS: l10n.eclass
# @MAINTAINER:
# Ulrich Müller <ulm@gentoo.org>
# @AUTHOR:
# Ben de Groot <yngwin@gentoo.org>
# @BLURB: convenience functions to handle localizations
# @DESCRIPTION:
# The l10n (localization) eclass offers a number of functions to more
# conveniently handle localizations (translations) offered by packages.
# These are meant to prevent code duplication for such boring tasks as
# determining the cross-section between the user's set LINGUAS and what
# is offered by the package.
if [[ -z ${_L10N_ECLASS} ]]; then
_L10N_ECLASS=1
# @ECLASS-VARIABLE: PLOCALES
# @DEFAULT_UNSET
# @DESCRIPTION:
# Variable listing the locales for which localizations are offered by
# the package.
#
# Example: PLOCALES="cy de el_GR en_US pt_BR vi zh_CN"
# @ECLASS-VARIABLE: PLOCALE_BACKUP
# @DEFAULT_UNSET
# @DESCRIPTION:
# In some cases the package fails when none of the offered PLOCALES are
# selected by the user. In that case this variable should be set to a
# default locale (usually 'en' or 'en_US') as backup.
#
# Example: PLOCALE_BACKUP="en_US"
# @FUNCTION: l10n_for_each_locale_do
# @USAGE: <function>
# @DESCRIPTION:
# Convenience function for processing localizations. The parameter should
# be a function (defined in the consuming eclass or ebuild) which takes
# an individual localization as (last) parameter.
#
# Example: l10n_for_each_locale_do install_locale
l10n_for_each_locale_do() {
local locs x
locs=$(l10n_get_locales)
for x in ${locs}; do
"${@}" ${x} || die "failed to process enabled ${x} locale"
done
}
# @FUNCTION: l10n_for_each_disabled_locale_do
# @USAGE: <function>
# @DESCRIPTION:
# Complementary to l10n_for_each_locale_do, this function will process
# locales that are disabled. This could be used for example to remove
# locales from a Makefile, to prevent them from being built needlessly.
l10n_for_each_disabled_locale_do() {
local locs x
locs=$(l10n_get_locales disabled)
for x in ${locs}; do
"${@}" ${x} || die "failed to process disabled ${x} locale"
done
}
# @FUNCTION: l10n_find_plocales_changes
# @USAGE: <translations dir> <filename pre pattern> <filename post pattern>
# @DESCRIPTION:
# Ebuild maintenance helper function to find changes in package offered
# locales when doing a version bump. This could be added for example to
# src_prepare
#
# Example: l10n_find_plocales_changes "${S}/src/translations" "${PN}_" '.ts'
l10n_find_plocales_changes() {
[[ $# -ne 3 ]] && die "Exactly 3 arguments are needed!"
ebegin "Looking in ${1} for new locales"
pushd "${1}" >/dev/null || die "Cannot access ${1}"
local current= x=
for x in ${2}*${3} ; do
x=${x#"${2}"}
x=${x%"${3}"}
current+="${x} "
done
popd >/dev/null
# RHS will be sorted with single spaces so ensure the LHS is too
# before attempting to compare them for equality. See bug #513242.
# Run them both through the same sorting algorithm so we don't have
# to worry about them being the same.
if [[ "$(printf '%s\n' ${PLOCALES} | LC_ALL=C sort)" != "$(printf '%s\n' ${current} | LC_ALL=C sort)" ]] ; then
eend 1 "There are changes in locales! This ebuild should be updated to:"
eerror "PLOCALES=\"${current%[[:space:]]}\""
return 1
else
eend 0
fi
}
# @FUNCTION: l10n_get_locales
# @USAGE: [disabled]
# @DESCRIPTION:
# Determine which LINGUAS the user has enabled that are offered by the
# package, as listed in PLOCALES, and return them. In case no locales
# are selected, fall back on PLOCALE_BACKUP. When the disabled argument
# is given, return the disabled locales instead of the enabled ones.
l10n_get_locales() {
local loc locs
if [[ -z ${LINGUAS+set} ]]; then
# enable all if unset
locs=${PLOCALES}
else
for loc in ${LINGUAS}; do
has ${loc} ${PLOCALES} && locs+="${loc} "
done
fi
[[ -z ${locs} ]] && locs=${PLOCALE_BACKUP}
if [[ ${1} == disabled ]]; then
local disabled_locs
for loc in ${PLOCALES}; do
has ${loc} ${locs} || disabled_locs+="${loc} "
done
locs=${disabled_locs}
fi
printf "%s" "${locs}"
}
# @FUNCTION: strip-linguas
# @USAGE: [<allow LINGUAS>|<-i|-u> <directories of .po files>]
# @DESCRIPTION:
# Make sure that LINGUAS only contains languages that a package can
# support. The first form allows you to specify a list of LINGUAS.
# The -i builds a list of po files found in all the directories and uses
# the intersection of the lists. The -u builds a list of po files found
# in all the directories and uses the union of the lists.
strip-linguas() {
local ls newls nols
if [[ $1 == "-i" ]] || [[ $1 == "-u" ]] ; then
local op=$1; shift
ls=$(find "$1" -name '*.po' -exec basename {} .po ';'); shift
local d f
for d in "$@" ; do
if [[ ${op} == "-u" ]] ; then
newls=${ls}
else
newls=""
fi
for f in $(find "$d" -name '*.po' -exec basename {} .po ';') ; do
if [[ ${op} == "-i" ]] ; then
has ${f} ${ls} && newls="${newls} ${f}"
else
has ${f} ${ls} || newls="${newls} ${f}"
fi
done
ls=${newls}
done
else
ls="$@"
fi
nols=""
newls=""
for f in ${LINGUAS} ; do
if has ${f} ${ls} ; then
newls="${newls} ${f}"
else
nols="${nols} ${f}"
fi
done
[[ -n ${nols} ]] \
&& einfo "Sorry, but ${PN} does not support the LINGUAS:" ${nols}
export LINGUAS=${newls:1}
}
fi
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