Rewrite beesd arg parser

Signed-off-by: Timofey Titovets <timofey.titovets@synesis.ru>

scripts/beesd.in

@@ -18,44 +18,70 @@ readonly bees_bin=$(realpath @LIBEXEC_PREFIX@/bees)
 
 command -v "$bees_bin" &> /dev/null || ERRO "Missing 'bees' agent"
 
-## Parse args
+uuid_valid(){
+    if uuidparse -n -o VARIANT $1 | grep -i -q invalid; then
+        false
+    fi
+}
+
+help(){
+    echo "Usage: beesd [options] <btrfs_uuid>"
+    echo "- - -"
+    exec "$bees_bin" --help
+}
+
+get_bees_supp_opts(){
+    "$bees_bin" --help |& awk '/--../ { gsub( ",", "" ); print $1 " " $2}'
+}
+
+SUPPORTED_ARGS=(
+    $(get_bees_supp_opts)
+)
+NOT_SUPPORTED_ARGS=()
 ARGUMENTS=()
-while [ $# -gt 0 ]; do
-    case "$1" in
-        -*)
-            ARGUMENTS+=($1)
-        ;;
-        *)
-            if [ -z "$UUID" ]; then
-                UUID="$1"
-            else
-                ERRO "Only one filesystem may be supplied"
-            fi
-        ;;
-    esac
-    shift
+
+for arg in "${@}"; do
+    supp=false
+    for supp_arg in "${SUPPORTED_ARGS[@]}"; do
+        if [ "$arg" == "$supp_arg" ]; then
+            supp=true
+            break
+        fi
+    done
+    if $supp; then
+        ARGUMENTS+=($arg)
+    else
+        NOT_SUPPORTED_ARGS+=($arg)
+    fi
 done
 
-case "$UUID" in
-    *-*-*-*-*)
-        FILE_CONFIG=""
-        for file in "$CONFIG_DIR"/*.conf; do
-            [ ! -f "$file" ] && continue
-            if grep -q "$UUID" "$file"; then
-                INFO "Find $UUID in $file, use as conf"
-                FILE_CONFIG="$file"
-            fi
-        done
-        [ ! -f "$FILE_CONFIG" ] && ERRO "No config for $UUID"
-        source "$FILE_CONFIG"
-    ;;
-    *)
-        echo "Usage: beesd [options] <btrfs_uuid>"
-        echo "- - -"
-        "$bees_bin" --help
-        exit 1
-    ;;
-esac
+for arg in "${ARGUMENTS[@]}"; do
+    case $arg in
+        -h) help;;
+        --help) help;;
+    esac
+done
+
+for arg in "${NOT_SUPPORTED_ARGS[@]}"; do
+    if uuid_valid $arg; then
+        [ ! -z "$UUID" ] && help
+        UUID=$arg
+    fi
+done
+
+[ -z "$UUID" ] && help
+
+
+FILE_CONFIG=""
+for file in "$CONFIG_DIR"/*.conf; do
+    [ ! -f "$file" ] && continue
+        if grep -q 'UUID=' "$file" | grep -q -- "$UUID"; then
+            INFO "Find $UUID in $file, use as conf"
+            FILE_CONFIG="$file"
+        fi
+done
+[ ! -f "$FILE_CONFIG" ] && ERRO "No config for $UUID"
+source "$FILE_CONFIG"
 
 
 ## Pre checks