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# Locale functions
#
# Copyright (C) 2012, 2018, 2019 Patrick McDermott
#
# This file is part of opkbuild.
#
# opkbuild is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# opkbuild is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with opkbuild. If not, see <http://www.gnu.org/licenses/>.
_OB_DEFAULT_LOCALE='en_US'
_OB_INTERNAL_TEXT_DOMAIN="libopkbuild_${LIBOPKBUILD_SHSOVERSION}"
_ob_text_domain=
_ob_builddir=
_ob_msgs_loaded=false
## @brief Get the current message domain
## @details \fBob_get_text_domain\fP() prints the currently loaded message
## domain.
## @return Returns 0 on success.
## @stdout Prints the name of the currently loaded message domain.
## @pure yes This function has no side effects.
ob_get_text_domain()
{
printf '%s' "${_ob_text_domain}"
return 0
}
_ob_try_load_messages()
{
local locale="${1}"
shift 1 || _ob_abort
local ms=
if [ x"${_ob_builddir}" = x'' ]; then # Env var set and not null
ms="${_ob_builddir}"
ms="${ms}/${locale}/${_ob_text_domain}.ms"
else
ms="${LOCALEDIR}"
ms="${ms}/${locale}/LC_MESSAGES/${_ob_text_domain}.ms"
fi
# POSIX on the dot utility:
# "If no readable file is found, a non-interactive shell shall abort"
# So to survive an ENOENT or other error and display a more informative
# error message before aborting, we need this eval/cat command. This is
# more resilient against race conditions than `[ -f "${ms}" ]` is.
eval "$(cat "${ms}" 2>/dev/null)" || return 1
return 0
}
## @brief Set and load the message domain
## @details \fBob_set_text_domain\fP() sets and loads the message domain for
## future \fBob_get_msg\fP() calls. A message domain is a catalog of
## localized messages identified by message IDs. Each application
## should have its own message domain. libopkbuild also has its own
## message domain and temporarily switches to it when needed.
## @operand text_domain req The message domain to load.
## @return Returns 0 on success or 1 if \fItext_domain\fP is missing or invalid
## or if the message domain cannot be loaded.
## @pure no This function sets an internal global variable and loads a message
## catalog that sets numerous message variables.
ob_set_text_domain()
{
local text_domain="${1}"
shift 1 || _ob_abort
case "${text_domain}" in *[!A-Za-z0-9_]* | '')
return 1
esac
_ob_text_domain="${text_domain}"
_ob_builddir="${OB_EXE_BUILDDIR-}"
# Exit early if domain's messages have already been loaded.
if eval "\${_ob_text_domain_${_ob_text_domain}_loaded}"; then
return
fi
eval "\${_ob_text_domain_${_ob_text_domain}_loaded}=true"
# Try to load the messages.
if ! _ob_try_load_messages "${LC_MESSAGES%.*}"; then
if ! _ob_try_load_messages "${LC_MESSAGES%_*}"; then
if ! _ob_try_load_messages "${_OB_DEFAULT_LOCALE}"; then
return 1
fi
fi
fi
_ob_msgs_loaded=true
return 0
}
## @brief Get a message from the current message domain
## @details \fBob_get_msg\fP() prints a message, identified by a message ID,
## from the currently loaded message catalog.
## \fBob_set_text_domain\fP() must be called first.
## @operand msgid req The ID of the message to print
## @return Returns 0 on success.
## @stdout Prints the requested message from the current message domain.
## @pure yes This function has no side effects.
ob_get_msg()
{
local msgid="${1}"
shift 1 || _ob_abort
if ! ${_ob_msgs_loaded}; then
printf '%s: Error: No text domain set\n' "${0##*/}" >&2
_ob_abort
fi
eval "printf '%s' \"\${msg_${_ob_text_domain}_${msgid}}\""
return 0
}
_ob_get_msg()
{
local msgid="${1}"
shift 1 || _ob_abort
eval "printf '%s' \"\${msg_${_OB_INTERNAL_TEXT_DOMAIN}_${msgid}}\""
return 0
}
_ob_load_internal_text_domain()
{
# Make sure LC_MESSAGES is set.
if [ -z "${LC_MESSAGES}" ]; then
if [ -n "${LC_ALL}" ]; then
LC_MESSAGES="${LC_ALL}"
elif [ -n "${LANG}" ]; then
LC_MESSAGES="${LANG}"
else
LC_MESSAGES="${_OB_DEFAULT_LOCALE}"
fi
fi
# Try to load the messages.
_ob_text_domain="${_OB_INTERNAL_TEXT_DOMAIN}"
_ob_builddir="${OB_LIB_BUILDDIR-}"
if ! _ob_try_load_messages "${LC_MESSAGES%.*}"; then
printf '%s: Error: Failed to load locale messages\n' \
"${0##*/}" >&2
fi
}
__init _ob_load_internal_text_domain
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