[FIXED JENKINS-11326] expose originalFileName as a (string) parameter

changelog.html

@@ -63,6 +63,9 @@ Upcoming changes</a>
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-11229">issue 11229</a>)
   <li class=rfe>
     Improved the classloading performance
+  <li class=rfe>
+    Expose original file name as a String parameter on for FileParameters
+    (<a href="https://issues.jenkins-ci.org/browse/JENKINS-11326">issue 11326</a>)
 </ul>
 </div><!--=TRUNK-END=-->
 

core/src/main/java/hudson/model/FileParameterValue.java

@@ -23,28 +23,30 @@
  */
 package hudson.model;
 
-import org.kohsuke.stapler.DataBoundConstructor;
-import org.kohsuke.stapler.StaplerRequest;
-import org.kohsuke.stapler.StaplerResponse;
-import org.apache.commons.fileupload.FileItem;
-import org.apache.commons.fileupload.disk.DiskFileItem;
-import org.apache.commons.lang.StringUtils;
-import org.apache.commons.io.FilenameUtils;
-import org.apache.commons.io.IOUtils;
-
-import hudson.tasks.BuildWrapper;
-import hudson.Launcher;
+import hudson.EnvVars;
 import hudson.FilePath;
+import hudson.Launcher;
+import hudson.tasks.BuildWrapper;
+import hudson.util.VariableResolver;
 
-import java.io.IOException;
 import java.io.File;
-import java.io.InputStream;
-import java.io.UnsupportedEncodingException;
-import java.io.OutputStream;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.UnsupportedEncodingException;
 import javax.servlet.ServletException;
 
+import org.apache.commons.fileupload.FileItem;
+import org.apache.commons.fileupload.disk.DiskFileItem;
+import org.apache.commons.io.FilenameUtils;
+import org.apache.commons.io.IOUtils;
+import org.apache.commons.lang.StringUtils;
+import org.kohsuke.stapler.DataBoundConstructor;
+import org.kohsuke.stapler.StaplerRequest;
+import org.kohsuke.stapler.StaplerResponse;
+
 /**
  * {@link ParameterValue} for {@link FileParameterDefinition}.
  *
@@ -86,6 +88,24 @@ public class FileParameterValue extends ParameterValue {
         this.location = location;
     }
 
+
+    /**
+     * Exposes the originalFileName as an environment variable.
+     */
+    @Override
+    public void buildEnvVars(AbstractBuild<?,?> build, EnvVars env) {
+        env.put(name,originalFileName);
+    }
+
+    @Override
+    public VariableResolver<String> createVariableResolver(AbstractBuild<?, ?> build) {
+        return new VariableResolver<String>() {
+            public String resolve(String name) {
+                return FileParameterValue.this.name.equals(name) ? originalFileName : null;
+            }
+        };
+    }
+
     /**
      * Get the name of the originally uploaded file. If this
      * {@link FileParameterValue} was created prior to 1.362, this method will