Added support for directories in MODS

#871

README.md

@@ -1136,10 +1136,12 @@ To use this option pass the environment variable `MODPACK`, such as
 top level of the zip archive. Make sure the jars are compatible with the
 particular `TYPE` of server you are running.
 
-You may also download individual mods using the `MODS` environment variable and supplying the URL or path
-to the jar files. Multiple mods/plugins should be comma separated.
+You may also download or copy over individual mods using the `MODS` environment variable. `MODS` contains a comma-separated list of
+- URL of a jar file
+- container path to a jar file
+- container path to a directory containing jar files
 
-    docker run -d -e MODS=https://www.example.com/mods/mod1.jar,https://www.example.com/mods/mod2.jar ...
+    docker run -d -e MODS=https://www.example.com/mods/mod1.jar,/plugins/common,/plugins/special/mod2.jar ...
 
 ### Remove old mods/plugins
 

start-finalSetupModpack

@@ -91,15 +91,18 @@ if [[ "$MODS" ]]; then
           exit 2
         fi
       fi
-    elif [[ "$i" =~ .*\.jar ]]; then
+    elif [[ -f "$i" && "$i" =~ .*\.jar ]]; then
       log "Copying plugin located at $i ..."
       out_file=$(basename "$i")
       if ! cp "$i" "${out_dir}/$out_file"; then
         log "ERROR: failed to copy from $i into $out_dir"
         exit 2
       fi
+    elif [[ -d "$i" ]]; then
+      log "Copying plugin jars from $i ..."
+      cp "$i"/*.jar "${out_dir}"
     else
-      log "ERROR Invalid URL or Path given in MODS: $i"
+      log "ERROR Invalid URL or path given in MODS: $i"
       exit 2
     fi
   done