From d4615df81b93b8e5d495f5e6bd327f90d6e242d7 Mon Sep 17 00:00:00 2001
From: Andrea Cosentino <ancosen@gmail.com>
Date: Tue, 24 Nov 2015 17:04:30 +0100
Subject: [PATCH] [KARAF-3278] Display warning message when trying to install
 an already installed bundle

---
 .../features/internal/service/FeaturesServiceImpl.java      | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/features/core/src/main/java/org/apache/karaf/features/internal/service/FeaturesServiceImpl.java b/features/core/src/main/java/org/apache/karaf/features/internal/service/FeaturesServiceImpl.java
index d7042ec69d2..5558970e85e 100644
--- a/features/core/src/main/java/org/apache/karaf/features/internal/service/FeaturesServiceImpl.java
+++ b/features/core/src/main/java/org/apache/karaf/features/internal/service/FeaturesServiceImpl.java
@@ -832,6 +832,12 @@ public void installFeatures(Set<String> features, String region, EnumSet<Option>
                     if (f != null) {
                         String req = f.getName() + "/" + new VersionRange(f.getVersion(), true);
                         featuresToAdd.add(req);
+                        Feature[] installedFeatures = listInstalledFeatures();
+                        for (int i=0;i<installedFeatures.length;i++) {
+                            if (installedFeatures[i].getName().equals(f.getName()) && installedFeatures[i].getVersion().equals(f.getVersion())) {
+                                System.out.println("The specified feature: '" + installedFeatures[i].getName() + "' version '" + installedFeatures[i].getVersion() + "' is already installed");
+                            }
+                        }
                         matched = true;
                     }
                 }