include/conf: Add support for multiple configuration files

The current conf implementation does not permit processes to use
more than one configuration file.
This commit modifies the conf module so that each process may use
an arbitrary number of configuration files by appending the name of
a config domain to the commandline of commands such as conf_get()
and conf_set(), falling back to "default" if the config domain was
omitted.
This commit further adds the conf_get_domains() method that may be
used to query the names of known configuration domains.

diff --git a/include/conf.sh b/include/conf.sh
index 84afbf66365d6d4c562121d64dc931ea2bebd3c3..a5de6d0224d071a7df9cb96e272be0ab23d3fbcc 100644 (file)
--- a/include/conf.sh
+++ b/include/conf.sh
@@ -31,8 +31,8 @@ __init() {
                 return 1
         fi
 
-       declare -xgr __conf_root="$TOOLBOX_HOME/conf"
-       declare -xgr __conf_file="$__conf_root/$script_name.conf"
+       declare -xgr __conf_root="$TOOLBOX_HOME/conf/$script_name"
+       declare -xgr __conf_default="$__conf_root/default.conf"
 
        if ! mkdir -p "$__conf_root"; then
                log_error "Could not create config dir"
@@ -44,14 +44,14 @@ __init() {
 
 conf_get() {
        local name="$1"
-       local default="$2"
+       local config="$2"
 
-       if ! grep -m 1 -oP "^$name=\K.*" "$__conf_file" 2>/dev/null; then
-               if (( $# <= 1 )); then
-                       return 1
-               fi
+       if [[ -z "$config" ]]; then
+               config="default"
+       fi
 
-               echo "$default"
+       if ! grep -m 1 -oP "^$name=\\K.*" "$__conf_root/$config.conf" 2>/dev/null; then
+               return 1
        fi
 
        return 0
@@ -59,8 +59,13 @@ conf_get() {
 
 conf_unset() {
        local name="$1"
+       local config="$2"
 
-       if ! sed -i -e "/^$name=.*/d" "$__conf_file" &> /dev/null; then
+       if [[ -z "$config" ]]; then
+               config="default"
+       fi
+
+       if ! sed -i -e "/^$name=.*/d" "$__conf_root/$config.conf" &> /dev/null; then
                return 1
        fi
 
@@ -71,16 +76,32 @@ conf_unset() {
 conf_set() {
        local name="$1"
        local value="$2"
+       local config="$3"
 
-       if conf_get "$name" &> /dev/null; then
-               if ! conf_unset "$name"; then
+       if [[ -z "$config" ]]; then
+               config="default"
+       fi
+
+       if conf_get "$name" "$config" &> /dev/null; then
+               if ! conf_unset "$name" "$config"; then
                        return 1
                fi
        fi
 
-       if ! echo "$name=$value" >> "$__conf_file"; then
+       if ! echo "$name=$value" >> "$__conf_root/$config.conf"; then
                return 1
        fi
 
        return 0
 }
+
+conf_get_domains() {
+       local config
+
+       while read -r config; do
+               config="${config##*/}"
+               echo "${config%.conf}"
+       done < <(find "$__conf_root" -type f -iname "*.conf")
+
+       return 0
+}