Pull request #751: [ROCKSOLID-11653] Fix exporting the EXPORTREADME.t…

…xt file when using a baseFolder and rootFolder from the API

Merge in MC/connect from feature/ROCKSOLID-11653-create-readme-file-when-cures-users-export to 4.4.x

* commit 'b183d64bfcafaf759d81a5e9fc254f621e26d3d9':
  [ROCKSOLID-11653] Fix exporting the EXPORTREADME.txt file when using a baseFolder and rootFolder from the API

server/src/com/mirth/connect/util/MessageExporter.java

@@ -15,6 +15,7 @@
 
 import org.apache.commons.collections4.CollectionUtils;
 import org.apache.commons.io.FileUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.commons.lang3.exception.ExceptionUtils;
 
 import com.mirth.connect.donkey.model.message.Message;
@@ -97,8 +98,11 @@ public synchronized int exportMessages(PaginatedList<Message> messageList, Messa
      * @return void
      */
     public synchronized void writeExportReadMe(MessageWriterOptions options) throws InterruptedException, MessageExportException {
+        String baseFolder = StringUtils.defaultString(options.getBaseFolder(), System.getProperty("user.dir"));
+        String rootFolder = FilenameUtils.getAbsolutePath(new File(baseFolder), options.getRootFolder());
         InputStream input = this.getClass().getResourceAsStream("EXPORTREADME.txt");
-        File exportReadMeFile = new File(options.getRootFolder() + File.separator + "EXPORTREADME.txt");
+        File exportReadMeFile = new File(rootFolder + File.separator + "EXPORTREADME.txt");
+
         try {
             FileUtils.copyInputStreamToFile(input, exportReadMeFile);
         } catch(Exception e) {