upgrade optional dependencies on plugin installation/upgrade

scm-webapp/src/main/java/sonia/scm/plugin/DefaultPluginManager.java

@@ -253,6 +253,21 @@ public class DefaultPluginManager implements PluginManager {
 
   private void collectPluginsToInstallOrUpdate(List<AvailablePlugin> plugins, String name) {
     if (!isInstalledOrPending(name) || isUpdatable(name)) {
+      collectDependentPlugins(plugins, name);
+    } else {
+      LOG.info("plugin {} is already installed or installation is pending, skipping installation", name);
+    }
+  }
+
+  private void collectOptionalPluginToInstallOrUpdate(List<AvailablePlugin> plugins, String name) {
+    if (isInstalledOrPending(name) && isUpdatable(name)) {
+      collectDependentPlugins(plugins, name);
+    } else {
+      LOG.info("optional plugin {} is not installed or not updatable", name);
+    }
+  }
+
+  private void collectDependentPlugins(List<AvailablePlugin> plugins, String name) {
     AvailablePlugin plugin = getAvailable(name).orElseThrow(() -> NotFoundException.notFound(entity(AvailablePlugin.class, name)));
 
     Set<String> dependencies = plugin.getDescriptor().getDependencies();
@@ -262,12 +277,16 @@ public class DefaultPluginManager implements PluginManager {
       }
     }
 
-      plugins.add(plugin);
+    Set<String> optionalDependencies = plugin.getDescriptor().getOptionalDependencies();
-    } else {
+    if (dependencies != null) {
-      LOG.info("plugin {} is already installed or installation is pending, skipping installation", name);
+      for (String optionalDependency : optionalDependencies) {
+        collectOptionalPluginToInstallOrUpdate(plugins, optionalDependency);
       }
     }
 
+    plugins.add(plugin);
+  }
+
   private boolean isInstalledOrPending(String name) {
     return getInstalled(name).isPresent() || getPending(name).isPresent();
   }

scm-webapp/src/test/java/sonia/scm/plugin/DefaultPluginManagerTest.java

@@ -260,6 +260,35 @@ class DefaultPluginManagerTest {
       verify(installer).install(review);
     }
 
+    @Test
+    void shouldUpdateAlreadyInstalledOptionalDependenciesWhenNewerVersionIsAvailable() {
+      AvailablePlugin review = createAvailable("scm-review-plugin");
+      when(review.getDescriptor().getOptionalDependencies()).thenReturn(ImmutableSet.of("scm-mail-plugin"));
+      AvailablePlugin mail = createAvailable("scm-mail-plugin", "1.1.0");
+      when(center.getAvailable()).thenReturn(ImmutableSet.of(review, mail));
+
+      InstalledPlugin installedMail = createInstalled("scm-mail-plugin", "1.0.0");
+      when(loader.getInstalledPlugins()).thenReturn(ImmutableList.of(installedMail));
+
+      manager.install("scm-review-plugin", false);
+
+      verify(installer).install(mail);
+      verify(installer).install(review);
+    }
+
+    @Test
+    void shouldNotUpdateOptionalDependenciesWhenNewerVersionIsAvailableButItIsNotInstalled() {
+      AvailablePlugin review = createAvailable("scm-review-plugin");
+      when(review.getDescriptor().getOptionalDependencies()).thenReturn(ImmutableSet.of("scm-mail-plugin"));
+      AvailablePlugin mail = createAvailable("scm-mail-plugin", "1.1.0");
+      when(center.getAvailable()).thenReturn(ImmutableSet.of(review, mail));
+
+      manager.install("scm-review-plugin", false);
+
+      verify(installer, never()).install(mail);
+      verify(installer).install(review);
+    }
+
     @Test
     void shouldRollbackOnFailedInstallation() {
       AvailablePlugin review = createAvailable("scm-review-plugin");

scm-webapp/src/test/java/sonia/scm/plugin/PluginCenterDtoMapperTest.java

@@ -67,6 +67,7 @@ class PluginCenterDtoMapperTest {
       "555000444",
       new Condition(Collections.singletonList("linux"), "amd64","2.0.0"),
       ImmutableSet.of("scm-review-plugin"),
+      ImmutableSet.of(),
       ImmutableMap.of("download", new Link("http://download.hitchhiker.com"))
     );
 
@@ -101,6 +102,7 @@ class PluginCenterDtoMapperTest {
       "12345678aa",
       new Condition(Collections.singletonList("linux"), "amd64","2.0.0"),
       ImmutableSet.of("scm-review-plugin"),
+      ImmutableSet.of(),
       ImmutableMap.of("download", new Link("http://download.hitchhiker.com/review"))
     );
 
@@ -115,6 +117,7 @@ class PluginCenterDtoMapperTest {
       "555000444",
       new Condition(Collections.singletonList("linux"), "amd64","2.0.0"),
       ImmutableSet.of("scm-review-plugin"),
+      ImmutableSet.of(),
       ImmutableMap.of("download", new Link("http://download.hitchhiker.com/hitchhiker"))
     );