[type/__localedef] Add state explorer

This commit is contained in:
Dennis Camera 2020-11-08 13:49:04 +01:00
parent f75d477209
commit 54e689f7c2
2 changed files with 82 additions and 2 deletions

View file

@ -0,0 +1,71 @@
#!/bin/sh -e
#
# 2020 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
#
# This file is part of cdist.
#
# cdist 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.
#
# cdist 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 cdist. If not, see <http://www.gnu.org/licenses/>.
#
# This explorer determines if the locale is defined on the target system.
# Will print nothing on error.
#
# Possible output:
# present:
# the main locale (and possibly aliases) is present
# absent:
# neither the main locale nor any aliases are present
#
command -v locale >/dev/null 2>&1 || exit 0
locales=$(locale -a)
parse_locale() {
# This function will split locales into their parts. Locale strings are
# usually of the form: [language[_territory][.codeset][@modifier]]
# For simplicity, language and territory are not separated by this function.
# Old Linux systems were also using "english" or "german" as locale strings.
# Usage: parse_locale locale_str lang_var codeset_var modifier_var
eval "${2:?}"="$(expr "$1" : '\([^.@]*\)')"
eval "${3:?}"="$(expr "$1" : '[^.]*\.\([^@]*\)')"
eval "${4:?}"="$(expr "$1" : '.*@\(.*\)$')"
}
format_locale() {
# Usage: format_locale language codeset modifier
printf '%s' "$1"
test -z "$2" || printf '.%s' "$2"
test -z "$3" || printf '@%s' "$3"
printf '\n'
}
gnu_normalize_codeset() {
# reimplementation of glibc/locale/programs/localedef.c normalize_codeset()
echo "$*" | tr '[:upper:]' '[:lower:]' | tr -cd '[:alnum:]'
}
locale_available() (
echo "${locales}" | grep -qxF "$1" || {
# glibc uses "normalized" locale names in archives.
# If a locale is stored in an archive, the normalized name will be
# printed by locale, so that needs to be checked, too.
localename=$(
parse_locale "$1" _lang _codeset _modifier \
&& format_locale "${_lang:?}" "$(gnu_normalize_codeset "${_codeset?}")" \
"${_modifier?}")
echo "${locales}" | grep -qxF "${localename}"
}
)
locale_available "${__object_id:?}" && echo present || echo absent

View file

@ -35,7 +35,8 @@ charmap=$(echo "$locale" | cut -d . -f 2)
# W-T-F!
locale_remove=$(echo "$locale" | sed 's/UTF-8/utf8/')
state=$(cat "$__object/parameter/state")
state_is=$(cat "${__object:?}/explorer/state")
state_should=$(cat "${__object:?}/parameter/state")
os=$(cat "$__global/explorer/os")
@ -46,7 +47,15 @@ case "$os" in
;;
esac
case "$state" in
# NOTE: If state explorer fails (e.g. locale(1) missing), the following check
# will always fail and let definition/removal run.
if test "${state_is}" = "${state_should}"
then
exit 0
fi
case ${state_should}
in
present)
echo localedef -A "$alias" -f "$charmap" -i "$input" "$locale"
;;