Fix subcmd exp-uninstall --help

sdata/options/exp-uninstall.sh

@@ -0,0 +1,29 @@
+# Handle args for subcmd: exp-uninstall
+# shellcheck shell=bash
+
+showhelp(){
+echo -e "Usage: $0 exp-uninstall [OPTIONS]...
+
+Experimental unintallation.
+
+Options:
+  -h, --help       Show this help message
+"
+}
+# `man getopt` to see more
+para=$(getopt \
+  -o h \
+  -l help \
+  -n "$0" -- "$@")
+[ $? != 0 ] && echo "$0: Error when getopt, please recheck parameters." && exit 1
+#####################################################################################
+## getopt Phase 1
+# ignore parameter's order, execute options below first
+eval set -- "$para"
+while true ; do
+  case "$1" in
+    -h|--help) showhelp;exit;;
+    --) break ;;
+    *) shift ;;
+  esac
+done

setup

@@ -20,16 +20,6 @@ case $1 in
 esac
 #####################################################################################
 case ${SCRIPT_SUBCOMMAND} in
-  exp-uninstall)
-    #source ./sdata/options/exp-install.sh
-    source ./sdata/step/exp-uninstall.sh
-    exit
-    ;;
-  exp-update)
-    source ./sdata/options/exp-update.sh
-    source ./sdata/step/exp-update.sh
-    exit
-    ;;
   install)
     source ./sdata/options/install.sh
     if [[ "${SKIP_ALLGREETING}" != true ]]; then
@@ -52,4 +42,14 @@ case ${SCRIPT_SUBCOMMAND} in
       fi
     fi
     ;;
+  exp-uninstall)
+    source ./sdata/options/exp-uninstall.sh
+    source ./sdata/step/exp-uninstall.sh
+    exit
+    ;;
+  exp-update)
+    source ./sdata/options/exp-update.sh
+    source ./sdata/step/exp-update.sh
+    exit
+    ;;
 esac