Using image helper to download MODS

#1031

start-setupModpack

@@ -2,6 +2,7 @@
 
 set -e -o pipefail
 
+# shellcheck source=start-utils
 . ${SCRIPTS:-/}start-utils
 if isDebugging; then
   set -x
@@ -71,25 +72,11 @@ if [[ "$MODS" ]]; then
 
   for i in ${MODS//,/ }
   do
-    if isURL $i; then
+    if isURL "$i"; then
       log "Downloading mod/plugin $i ..."
-      if isValidFileURL jar "$i"; then
-        if ! curl -fsSL -o "${out_dir}/$(getFilenameFromUrl "${i}")" "${i}"; then
-          log "ERROR: failed to download from $i into $out_dir"
-          exit 2
-        fi
-      else
-        effective_url=$(resolveEffectiveUrl "$i")
-        if isValidFileURL jar "${effective_url}"; then
-          out_file=$(getFilenameFromUrl "${effective_url}")
-          if ! curl -fsSL -o "${out_dir}/$out_file" "${effective_url}"; then
-            log "ERROR: failed to download from $i into $out_dir"
-            exit 2
-          fi
-        else
-          log "ERROR: $effective_url resolved from $i is not a valid jar URL"
-          exit 2
-        fi
+      if ! get -o "${out_dir}" "$i"; then
+        log "ERROR: failed to download from $i into $out_dir"
+        exit 2
       fi
     elif [[ -f "$i" && "$i" =~ .*\.jar ]]; then
       log "Copying plugin located at $i ..."