entlicher commented on a change in pull request #3180:
URL: https://github.com/apache/netbeans/pull/3180#discussion_r715659748



##########
File path: 
ide/extexecution.base/src/org/netbeans/api/extexecution/base/ExplicitProcessParameters.java
##########
@@ -416,6 +497,12 @@ public Builder combine(@NullAllowed 
ExplicitProcessParameters p) {
             if (p.getArguments() != null) {
                 args(p.getArguments());
             }
+            if (p.getWorkingDirectory() != null) {
+                workingDirectory(p.getWorkingDirectory());
+            }
+            if (!p.getEnvironmentVariables().isEmpty()) {
+                environmentVariables(p.getEnvironmentVariables());

Review comment:
       You've inspired me by null values of env. variables. They are used to 
remove an existing env. variable.
   Javadoc improved to describe that.




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