allow parameters to be missing, if not used

Signed-off-by: Nico Schottelius <nico@kr.ethz.ch>

bin/cdist-config

@@ -207,6 +207,17 @@ __cdist_type_parameter_file()
    echo "$(__cdist_type_parameter_dir "$1")/$2"
 }
 
+# Shorthand for required and optional
+__cdist_type_parameter_required()
+{
+   __cdist_type_parameter_file "$1/$__cdist_name_parameter_required"
+}
+
+__cdist_type_parameter_optional()
+{
+   __cdist_type_parameter_file "$1/$__cdist_name_parameter_optional"
+}
+
 __cdist_type_from_object()
 {
    echo "${1%%/*}"

bin/cdist-type-emulator

@@ -78,20 +78,24 @@ while [ $# -gt 0 ]; do
 done
 
 # Ensure required parameters are given
-while read required; do
-   if [ ! -f "${tempparameter}/${required}" ]; then
-      __cdist_usage "Missing required parameter $required"
-   fi
-
-   mv "${tempparameter}/${required}" "${__cdist_parameter_dir}"
-done < "$(__cdist_type_parameter_file "$__cdist_type" "$__cdist_name_parameter_required")"
+if [ -f "$(__cdist_type_parameter_required "$__cdist_type")" ]; then
+   while read required; do
+      if [ ! -f "${tempparameter}/${required}" ]; then
+         __cdist_usage "Missing required parameter $required"
+      fi
+
+      mv "${tempparameter}/${required}" "${__cdist_parameter_dir}"
+   done < "$(__cdist_type_parameter_required "$__cdist_type")"
+fi
 
 # Allow optional parameters
-while read optional; do
-   if [ -f "${tempparameter}/${optional}" ]; then
-      mv "${tempparameter}/${optional}" "${__cdist_parameter_dir}"
-   fi
-done < "$(__cdist_type_parameter_file "$__cdist_type" "$__cdist_name_parameter_optional")"
+if [ -f "$(__cdist_type_parameter_optional "$__cdist_type")" ]; then
+   while read optional; do
+      if [ -f "${tempparameter}/${optional}" ]; then
+         mv "${tempparameter}/${optional}" "${__cdist_parameter_dir}"
+      fi
+   done < "$(__cdist_type_parameter_optional "$__cdist_type")"
+fi
 
 # Error out on other paramaters
 cd "${tempparameter}"