"shellpki revoke" can be run interactively or not

shellpki

@@ -688,15 +688,42 @@ EOF
 }
 
 revoke() {
-    if [ "${1}" = "" ]; then
+    non_interactive=0
+
+    # Parse options
+    # based on https://gist.github.com/deshion/10d3cb5f88a21671e17a
+    while :; do
+        case $1 in
+            --non-interactive)
+                non_interactive=1
+                ;;
+            --)
+                # End of all options.
+                shift
+                break
+                ;;
+            -?*)
+                # ignore unknown options
+                warning "Warning: unknown option (ignored): \`$1'"
+                ;;
+            *)
+                # Default case: If no more options then break out of the loop.
+                break
+                ;;
+        esac
+
+        shift
+    done
+
+    # The name of the certificate
+    cn="${1:-}"
+
+    if [ -z "${cn}" ]; then
         show_usage >&2
         exit 1
     fi
+
     crt_file="${CRT_DIR}/${cn}.crt"
-
-    # get CN from param
-    cn="${1}"
-
     # check if CRT exists
     if [ ! -f "${crt_file}" ]; then
         error "Unknow CN : ${cn} (\`${crt_file}' not found)"