Add feature:contains command (#2523)

features/command/pom.xml

@@ -54,6 +54,11 @@
             <groupId>org.osgi</groupId>
             <artifactId>org.osgi.framework</artifactId>
         </dependency>
+        <dependency>
+            <!-- for ContainsBundleCommand -->
+            <groupId>org.apache.karaf.bundle</groupId>
+            <artifactId>org.apache.karaf.bundle.core</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.apache.karaf.features</groupId>
             <artifactId>org.apache.karaf.features.core</artifactId>

features/command/src/main/java/org/apache/karaf/features/command/ContainsBundleCommand.java

@@ -0,0 +1,111 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.karaf.features.command;
+
+import org.apache.karaf.bundle.core.BundleService;
+import org.apache.karaf.features.BundleInfo;
+import org.apache.karaf.features.Feature;
+import org.apache.karaf.features.FeaturesService;
+import org.apache.karaf.features.command.completers.InstalledRepoNameCompleter;
+import org.apache.karaf.shell.api.action.Command;
+import org.apache.karaf.shell.api.action.Completion;
+import org.apache.karaf.shell.api.action.Option;
+import org.apache.karaf.shell.api.action.lifecycle.Reference;
+import org.apache.karaf.shell.api.action.lifecycle.Service;
+import org.apache.karaf.shell.support.CommandException;
+import org.osgi.framework.Bundle;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Set;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;
+
+@Command(scope = "feature", name = "contains", description = "Finds the features that contain a specified bundle.")
+@Service
+public class ContainsBundleCommand extends FeaturesCommandSupport {
+
+    @Option(name = "-b", description = "Show features containing the given bundle id", required = false, multiValued = false)
+    Integer bundleId;
+
+    @Option(name = "-s", description = "Show features containing a bundle with the given symbolic name", required = false, multiValued = false)
+    String bundleName;
+
+    @Option(name = "-u", description = "Show features containing a bundle with the given URL", required = false, multiValued = false)
+    String bundleUrl;
+
+    @Option(name = "-i", aliases = {"--installed"}, description = "Display a list of all installed features only", required = false, multiValued = false)
+    boolean onlyInstalled;
+
+    @Option(name = "--repository", description = "Only list features from that repository", required = false, multiValued = false)
+    @Completion(InstalledRepoNameCompleter.class)
+    String repository;
+
+    @Reference
+    BundleService bundleService;
+
+    @Override
+    protected void doExecute(FeaturesService featuresService) throws Exception {
+        String bundleLocation;
+        if (bundleId != null) {
+            Bundle bundle = bundleService.getBundle(bundleId.toString());
+            if (bundle == null)
+                throw new CommandException("No bundles found with id " + bundleId);
+            bundleLocation = bundleService.getInfo(bundle).getUpdateLocation();
+        } else if (bundleName != null) {
+            Bundle bundle = bundleService.selectBundles(List.of(), true).stream()
+                    .filter(b -> bundleName.equals(b.getSymbolicName()))
+                    .findAny()
+                    .orElseThrow(() -> new CommandException("No bundles found with name " + bundleName));
+            bundleLocation = bundleService.getInfo(bundle).getUpdateLocation();
+        } else if (bundleUrl != null) {
+             bundleLocation = bundleUrl;
+        } else {
+            throw new CommandException("Either bundle id, name or URL must be specified");
+        }
+
+        if (bundleLocation == null)
+            throw new CommandException("Could not determine URL of the specified bundle");
+
+        Feature[] features;
+        if (repository != null && !onlyInstalled)
+            features = featuresService.getFeatures(repository);
+        else
+            features = featuresService.listFeatures();
+
+        Set<Feature> containingFeatures = Arrays.stream(features)
+                .filter(f -> !onlyInstalled || featuresService.isInstalled(f))
+                .filter(f -> f.getBundles().stream().anyMatch(byBundleLocation(bundleLocation)))
+                .collect(Collectors.toUnmodifiableSet());
+
+        containingFeatures.stream()
+                .map(f -> String.format("%s %s", f.getName(), f.getVersion()))
+                .sorted()
+                .forEach(System.out::println);
+    }
+
+    private Predicate<BundleInfo> byBundleLocation(String bundleLocation) {
+        return bundleInfo ->
+        {
+            String location = bundleInfo.getLocation();
+            String originalLocation = bundleInfo.getOriginalLocation();
+            return (location != null && location.startsWith(bundleLocation)) ||
+                    (originalLocation != null && originalLocation.startsWith(bundleLocation));
+        };
+    }
+
+}