[fix] : Fixed not being able to get the description of .add

Author: Hayao0819

tools/channel.sh

@@ -104,10 +104,16 @@ desc() {
     if [[ ! "$(bash "${script_path}/tools/channel.sh" -a ${arch} -n -b check "${1}")" = "correct" ]]; then
         exit 1
     fi
-    if [[ ! "$(cat "${script_path}/channels/${1}/alteriso" 2> /dev/null)" = "alteriso=${alteriso_version}" ]] && [[ "${opt_nochkver}" = false ]]; then
+    local _channel
+    if [[ ! -d "${script_path}/channels/${1}" ]]; then
+        _channel="${1}.add"
+    else
+        _channel="${1}"
+    fi
+    if [[ ! "$(cat "${script_path}/channels/${_channel}/alteriso" 2> /dev/null)" = "alteriso=${alteriso_version}" ]] && [[ "${opt_nochkver}" = false ]]; then
         "${script_path}/tools/msg.sh" --noadjust -l 'ERROR:' --noappname error "Not compatible with AlterISO3"
-    elif [[ -f "${script_path}/channels/${1}/description.txt" ]]; then
-        echo -ne "$(cat "${script_path}/channels/${1}/description.txt")\n"
+    elif [[ -f "${script_path}/channels/${_channel}/description.txt" ]]; then
+        echo -ne "$(cat "${script_path}/channels/${_channel}/description.txt")\n"
     else
         "${script_path}/tools/msg.sh" --noadjust -l 'WARN :' --noappname warn "This channel does not have a description.txt"
     fi