From f7c90f7c0edb834424e3ddfe1c6fb022b593493d Mon Sep 17 00:00:00 2001
From: Gavin Mogan <git@gavinmogan.com>
Date: Sat, 31 Oct 2020 16:37:49 -0700
Subject: [PATCH] Fixes #214 by emptying the ref dir instead of deleting it

---
 .../jenkins/tools/pluginmanager/impl/PluginManager.java  | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/plugin-management-library/src/main/java/io/jenkins/tools/pluginmanager/impl/PluginManager.java b/plugin-management-library/src/main/java/io/jenkins/tools/pluginmanager/impl/PluginManager.java
index cb9af1190..f0d6ecd16 100644
--- a/plugin-management-library/src/main/java/io/jenkins/tools/pluginmanager/impl/PluginManager.java
+++ b/plugin-management-library/src/main/java/io/jenkins/tools/pluginmanager/impl/PluginManager.java
@@ -124,7 +124,14 @@ public void start() {
     public void start(boolean downloadUc) {
         if (refDir.exists()) {
             try {
-                FileUtils.deleteDirectory(refDir);
+                File[] toBeDeleted = refDir.listFiles();
+                for (File deletableFile : toBeDeleted ) {
+                    if (deletableFile.isDirectory()) {
+                        FileUtils.deleteDirectory(deletableFile);
+                    } else {
+                        deletableFile.delete();
+                    }
+                }
             } catch (IOException e) {
                 throw new UncheckedIOException("Unable to delete: " + refDir.getAbsolutePath(), e);
             }