From d0e13ba1ddd383bc461f0efe547c91166ad789bf Mon Sep 17 00:00:00 2001
From: Anders Eriksson <aeri3@kth.se>
Date: Wed, 19 Aug 2020 11:43:14 +0200
Subject: [PATCH] Empty argument tag should add empty string instead of null
 (#150)

* empty argument tag should add empty string instead of null

* update function call style to match rest of code
---
 src/main/java/org/codehaus/mojo/exec/ExecMojo.java | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/main/java/org/codehaus/mojo/exec/ExecMojo.java b/src/main/java/org/codehaus/mojo/exec/ExecMojo.java
index 439d875a..c997889b 100644
--- a/src/main/java/org/codehaus/mojo/exec/ExecMojo.java
+++ b/src/main/java/org/codehaus/mojo/exec/ExecMojo.java
@@ -676,6 +676,10 @@ else if ( isLongModulePathArgument( specialArg ) || isLongClassPathArgument( spe
             {
                 specialArg = (String) argument;
             }
+            else if (argument == null)
+            {
+                commandArguments.add( "" );
+            }
             else
             {
                 commandArguments.add( (String) argument );