#!/usr/bin/env bash
# SPDX-FileCopyrightText: 2022 Patrick Spek
#
# SPDX-License-Identifier: AGPL-3.0-or-later
# Read a particular value from a key/value configuration file. Using this
# function introduces a dependency on awk.
config() {
config_for "${BASHTARD_PLATFORM[fqdn]}" "$@"
}
config_for() {
local host=$1 ; shift
local key=$1 ; shift
local default=$1 ; shift
local default
local file
local files
files=(
"$BASHTARD_ETCDIR/secrets"
"$BASHTARD_ETCDIR/hosts.d/$host"
"$BASHTARD_ETCDIR/os.d/${BASHTARD_PLATFORM[key]}"
"$BASHTARD_ETCDIR/defaults"
)
if [[ -n "$BASHTARD_PLAYBOOK" ]]
then
debug "bashtard/config_for" "BASHTARD_PLAYBOOK=$BASHTARD_PLAYBOOK, adding etc entries"
files+=(
"$BASHTARD_ETCDIR/playbooks.d/$BASHTARD_PLAYBOOK/etc/os.d/${BASHTARD_PLATFORM[key]}"
"$BASHTARD_ETCDIR/playbooks.d/$BASHTARD_PLAYBOOK/etc/defaults"
)
fi
files+=(
"$BASHTARD_SHAREDIR/os.d/${BASHTARD_PLATFORM[key]}"
"$BASHTARD_SHAREDIR/defaults"
)
# Check configuration files
for file in "${files[@]}"
do
debug "bashtard/config_for" "Checking for '$key' in '$file'"
[[ ! -f $file ]] && continue
value="$(awk -F= '$1 == "'"$key"'" { print $NF }' "$file")"
if [[ -n $value ]]
then
debug "bashtard/config_for" "Found $key=$value in $file"
printf "%s" "$value"
return
fi
done
# Return default value
if [[ -n $default ]]
then
printf "%s" "$default"
return
fi
# Error
alert "bashtard/config_for" "No configuration value for $key"
}