101 lines
3.1 KiB
Bash
Executable File
101 lines
3.1 KiB
Bash
Executable File
#!/bin/sh -e
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#
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# 2020 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
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#
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# This file is part of cdist.
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#
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# cdist is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# cdist is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with cdist. If not, see <http://www.gnu.org/licenses/>.
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#
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# This explorer determines if the locale is defined on the target system.
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# Will print nothing on error.
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#
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# Possible output:
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# present:
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# the main locale (and possibly aliases) is present
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# absent:
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# neither the main locale nor any aliases are present
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# alias-present:
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# the main locale is absent, but at least one of its aliases is present
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#
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# Hardcoded, create a pull request in case it is at another location for
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# some other distro. (cf. gencode-remote)
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aliasfile='/usr/share/locale/locale.alias'
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command -v locale >/dev/null 2>&1 || exit 0
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locales=$(locale -a)
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parse_locale() {
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# This function will split locales into their parts. Locale strings are
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# usually of the form: [language[_territory][.codeset][@modifier]]
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# For simplicity, language and territory are not separated by this function.
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# Old Linux systems were also using "english" or "german" as locale strings.
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# Usage: parse_locale locale_str lang_var codeset_var modifier_var
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eval "${2:?}"="$(expr "$1" : '\([^.@]*\)')"
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eval "${3:?}"="$(expr "$1" : '[^.]*\.\([^@]*\)')"
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eval "${4:?}"="$(expr "$1" : '.*@\(.*\)$')"
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}
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format_locale() {
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# Usage: format_locale language codeset modifier
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printf '%s' "$1"
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test -z "$2" || printf '.%s' "$2"
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test -z "$3" || printf '@%s' "$3"
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printf '\n'
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}
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gnu_normalize_codeset() {
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# reimplementation of glibc/locale/programs/localedef.c normalize_codeset()
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echo "$*" | tr '[:upper:]' '[:lower:]' | tr -cd '[:alnum:]'
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}
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locale_available() (
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echo "${locales}" | grep -qxF "$1" || {
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# glibc uses "normalized" locale names in archives.
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# If a locale is stored in an archive, the normalized name will be
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# printed by locale, so that needs to be checked, too.
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localename=$(
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parse_locale "$1" _lang _codeset _modifier \
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&& format_locale "${_lang:?}" "$(gnu_normalize_codeset "${_codeset?}")" \
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"${_modifier?}")
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echo "${locales}" | grep -qxF "${localename}"
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}
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)
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if locale_available "${__object_id:?}"
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then
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echo present
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else
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# NOTE: locale.alias can be symlinked.
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if test -e "${aliasfile}"
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then
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# Check if one of the aliases of the locale is defined
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baselocale=$(
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parse_locale "${__object_id:?}" _lang _codeset _modifiers \
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&& format_locale "${_lang}" "${_codeset}")
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while read -r _alias _localename
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do
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if test "${_localename}" = "${baselocale}" \
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&& echo "${locales}" | grep -qxF "${_alias}"
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then
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echo alias-present
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exit 0
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fi
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done <"${aliasfile}"
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fi
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echo absent
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fi
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