Add subcmd virtmon (WIP)

sdata/subcmd-virtmon/0.run.sh

@@ -0,0 +1,13 @@
+# This script is meant to be sourced.
+# It's not for directly running.
+
+# shellcheck shell=bash
+
+readarray -t vmon < <(hyprctl -j monitors all | jq -r '.[] | select(.name | test("^HEADLESS-")) | .name')
+
+if [ "${#vmon[@]}" -gt 0 ]; then
+  printf '%s\n' "${vmon[@]}"
+else
+  echo "no headless monitors found" >&2
+  exit 1
+fi

sdata/subcmd-virtmon/options.sh

@@ -0,0 +1,33 @@
+# Handle args for subcmd: checkdeps
+# shellcheck shell=bash
+
+showhelp(){
+echo -e "Syntax: $0 virtmon [OPTIONS]
+
+Create virtual monitor for testing multi-monitors.
+
+Options:
+  -h, --help       Show this help message
+"
+}
+# `man getopt` to see more
+para=$(getopt \
+  -o h \
+  -l help \
+  -n "$0" -- "$@")
+[ $? != 0 ] && echo "$0: Error when getopt, please recheck parameters." && exit 1
+#####################################################################################
+eval set -- "$para"
+while true ; do
+  case "$1" in
+    -h|--help) showhelp;exit;;
+    --) shift;break ;;
+    *) sleep 0 ;;
+  esac
+done
+
+#if [[ -f "$1" ]]; then
+#  echo "Using list file \"$1\".";LIST_FILE_PATH="$1";shift 1
+#else
+#  echo "Wrong path \"$1\" of list file.";exit 1
+#fi