Delete plugin zip on uninstall (#136)

pf4j/src/main/java/ro/fortsoft/pf4j/DefaultPluginRepository.java

@@ -68,7 +68,7 @@ public class DefaultPluginRepository extends BasePluginRepository {
 
     @Override
     public boolean deletePluginPath(Path pluginPath) {
-        // TODO remove plugin zip ?
+        FileUtils.optimisticDelete(FileUtils.findWithEnding(pluginPath, ".zip", ".ZIP", ".Zip"));
         return super.deletePluginPath(pluginPath);
     }
 

pf4j/src/main/java/ro/fortsoft/pf4j/util/FileUtils.java

@@ -118,4 +118,33 @@ public class FileUtils {
             }
         }
     }
+
+    /**
+     * Finds a path with various endings or null if not found
+     * @param basePath the base name
+     * @param endings a list of endings to search for
+     * @return new path or null if not found
+     */
+    public static Path findWithEnding(Path basePath, String... endings) {
+        for (String ending : endings) {
+            Path newPath = basePath.resolveSibling(basePath.getFileName() + ending);
+            if (Files.exists(newPath)) {
+                return newPath;
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Delete a file (not recursively) and ignore any errors
+     * @param path the path to delete
+     */
+    public static void optimisticDelete(Path path) {
+        if (path == null) {
+            return;
+        }
+        try {
+            Files.delete(path);
+        } catch (IOException ignored) { }
+    }
 }

pf4j/src/test/java/ro/fortsoft/pf4j/DefaultPluginRepositoryTest.java

@@ -44,6 +44,8 @@ public class DefaultPluginRepositoryTest {
         testFolder.newFolder("plugin-1");
         // Prove that we can delete a folder with a file inside
         Files.createFile(Paths.get(testFolder.getRoot().getAbsolutePath()).resolve("plugin-1").resolve("myfile"));
+        // Create a zip file for plugin-1 to test that it is deleted when plugin is deleted
+        Files.createFile(Paths.get(testFolder.getRoot().getAbsolutePath()).resolve("plugin-1.zip"));
         testFolder.newFolder("plugin-2");
         testFolder.newFolder("plugin-3");
     }
@@ -74,7 +76,9 @@ public class DefaultPluginRepositoryTest {
 
         PluginRepository instance = new DefaultPluginRepository(pluginsRoot, false);
 
+        assertTrue(Files.exists(pluginsRoot.resolve("plugin-1.zip")));
         assertTrue(instance.deletePluginPath(pluginsRoot.resolve("plugin-1")));
+        assertFalse(Files.exists(pluginsRoot.resolve("plugin-1.zip")));
         assertTrue(instance.deletePluginPath(pluginsRoot.resolve("plugin-3")));
         assertFalse(instance.deletePluginPath(pluginsRoot.resolve("plugin-4")));