Merge pull request #2962 from oleg-nenashev/bug/JENKINS-45895

[FIXED JENKINS-45895] - JNLPLauncher config.jelly should not display Work Dir settings when included from other class

core/src/main/java/hudson/slaves/JNLPLauncher.java

@@ -163,6 +163,22 @@ public class JNLPLauncher extends ComputerLauncher {
         public String getDisplayName() {
             return Messages.JNLPLauncher_displayName();
         }
+        
+        /**
+         * Checks if Work Dir settings should be displayed.
+         * 
+         * This flag is checked in {@code config.jelly} before displaying the 
+         * {@link JNLPLauncher#workDirSettings} property.
+         * By default the configuration is displayed only for {@link JNLPLauncher},
+         * but the implementation can be overridden.
+         * @return {@code true} if work directories are supported by the launcher type.
+         * @since TODO
+         */
+        public boolean isWorkDirSupported() {
+            // This property is included only for JNLPLauncher by default. 
+            // Causes JENKINS-45895 in the case of includes otherwise
+            return DescriptorImpl.class.equals(getClass());
+        }
     };
 
     /**

core/src/main/resources/hudson/slaves/JNLPLauncher/config.jelly

@@ -24,7 +24,10 @@ THE SOFTWARE.
 
 <?jelly escape-by-default='true'?>
 <j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form">
-  <f:property title="${%Enable work directory}" field="workDirSettings" />
+  <!-- This property is included only if used directly. Causes JENKINS-45895 in the case of includes otherwise -->
+  <j:if test="${descriptor.workDirSupported}"> 
+    <f:property title="${%Enable work directory}" field="workDirSettings" />
+  </j:if>
   <f:advanced>
     <f:entry title="${%Tunnel connection through}" help="/help/system-config/master-slave/jnlp-tunnel.html">
       <f:textbox field="tunnel"/>