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# -*-eselect-*- vim: ft=eselect
# Copyright (c) 2005-2020 Gentoo Authors
#
# This file is part of the 'eselect' tools framework.
#
# eselect 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 2 of the License, or (at your option) any later
# version.
#
# eselect 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
# eselect. If not, see <http://www.gnu.org/licenses/>.
# store_config file key value PUBLIC
# Stores a $key/$value pair for given module in $configfile
store_config() {
# we need at least "module" and "key"
[[ ${#@} -ge 2 ]] || die
local configfile=${1} key=${2} value content vars line="" changed=0
shift 2
value=${@}
if [[ ! -e ${configfile} ]] ; then
mkdir -p ${configfile%/*} \
|| die -q \
"Couldn't create directory ${configfile%/*}"
fi
store_config_header() {
echo "# Configuration file for eselect" \
> ${configfile}
echo "# This file has been automatically generated." \
>> ${configfile}
}
if [[ ! -f ${configfile} ]] ; then
store_config_header
echo "${key}=\"${value}\"" \
>> ${configfile}
return
fi
content=$(<${configfile})
if [[ -z ${content} ]] ; then
store_config_header
echo "${key}=\"${value}\"" \
>> ${configfile}
return
fi
(
# parse the names of all settings in the file
local ifs_save=${IFS} IFS=$'\n'
for line in ${content} ; do
line=${line##*([[:space:]])}
[[ ${line} != "#"* && ${line} == *=* ]] || continue
line=${line%%=*}
# assignment will fail if ${line} is not a valid identifier
local ${line}="" || continue
vars=(${vars[@]} ${line})
done
IFS=${ifs_save}
source ${configfile} 2>&1 > /dev/null \
|| die "Failed to source ${configfile}."
store_config_header
for var in ${vars[@]} ; do
if [[ ${var} == ${key} ]] ; then
echo "${var}=\"${value}\"" \
>> ${configfile}
changed=1
else
echo "${var}=\"${!var}\"" \
>> ${configfile}
fi
done
[[ ${changed} == 1 ]] \
|| echo "${key}=\"${value}\"" \
>> ${configfile}
)
}
# load_config module key PUBLIC
# Loads $key value from $configfile
load_config() {
[[ ${#@} -eq 2 ]] || die
local configfile key value
configfile=${1}
key=${2}
[[ ! -e ${configfile} ]] \
&& return 1
value=$(
unset ${key}
source ${configfile} 1>&2 > /dev/null \
|| die "Failed to source ${configfile}."
echo "${!key}"
)
echo "${value}"
}
# append_config file key item ... PUBLIC
# Appends $item to already stored value of $key in $configfile
# if $item is not already part of $key
append_config() {
[[ ${#@} -gt 2 ]] || die
local configfile=${1} key=${2} item oldvalue newvalue
shift 2
item="$@"
oldvalue=$(load_config ${configfile} ${key})
if ! has ${item} ${oldvalue[@]} ; then
newvalue=( ${oldvalue[@]} ${item} )
store_config ${configfile} ${key} ${newvalue[@]}
fi
}
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