core: Add mutually exclusive plugin support

Add new, optional "Conflicts" keyword to the plugin meta-data which
takes a list of names of other plugings that cannot be loaded together
with this plugin.

First plugin loaded wins

Implements #155

6 files changed, 76 insertions, 0 deletions

diff --git a/tests/data/plugin-loader/conflicts/librygel-no-conflict.so b/tests/data/plugin-loader/conflicts/librygel-no-conflict.so
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/tests/data/plugin-loader/conflicts/librygel-no-conflict.so
diff --git a/tests/data/plugin-loader/conflicts/librygel-tracker.so b/tests/data/plugin-loader/conflicts/librygel-tracker.so
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/tests/data/plugin-loader/conflicts/librygel-tracker.so
diff --git a/tests/data/plugin-loader/conflicts/librygel-tracker3.so b/tests/data/plugin-loader/conflicts/librygel-tracker3.so
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/tests/data/plugin-loader/conflicts/librygel-tracker3.so
diff --git a/tests/data/plugin-loader/conflicts/test.conf b/tests/data/plugin-loader/conflicts/test.conf
new file mode 100644
index 00000000..85c6c8a4
--- /dev/null
+++ b/tests/data/plugin-loader/conflicts/test.conf
@@ -0,0 +1,11 @@
+[general]
+log-level = *:5
+
+[Tracker3]
+enabled = true
+
+[SomePlugin]
+enabled = true
+
+[Tracker]
+enabled = true
diff --git a/tests/meson.build b/tests/meson.build
index 9cc00e38..bb690457 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -66,6 +66,19 @@ http_time_seek_test = executable(
     dependencies : [glib, soup]
 )
 
+test('rygel-plugin-loader-test',
+    executable(
+        'rygel-plugin-loader-test',
+        files(
+            'plugin-loader/rygel-plugin-loader-test.vala'
+        ),
+        dependencies : [
+            rygel_core
+        ]
+    ),
+    workdir : meson.current_source_dir(),
+)
+
 test('rygel-searchable-container-test', searchable_container_test)
 test('rygel-object-creator-test', object_creator_test)
 test('rygel-regression-test', regression_test)
diff --git a/tests/plugin-loader/rygel-plugin-loader-test.vala b/tests/plugin-loader/rygel-plugin-loader-test.vala
new file mode 100644
index 00000000..3f8db60d
--- /dev/null
+++ b/tests/plugin-loader/rygel-plugin-loader-test.vala
@@ -0,0 +1,52 @@
+class TestPluginLoader : Rygel.PluginLoader {
+    private string[] expected_plugins;
+    private string[] forbidden_plugins;
+    public string[] loaded_plugins;
+
+    public TestPluginLoader(string testset_location,
+                            string[] expected_plugins,
+                            string[] forbidden_plugins) {
+        Object(base_path : "data/plugin-loader/" + testset_location);
+        this.forbidden_plugins = forbidden_plugins;
+        this.expected_plugins = expected_plugins;
+        this.loaded_plugins = new string[0];
+    }
+
+    protected override bool load_module_from_file (File module) {
+        assert (module.get_basename () in expected_plugins);
+        assert (!(module.get_basename () in forbidden_plugins));
+
+        loaded_plugins += module.get_basename ();
+
+        // Just do nothing
+        return true;
+    }
+}
+
+void test_plugin_loader_conflict () {
+    try {
+        var config = new Rygel.UserConfig.with_paths (
+            "data/plugin-loader/conflicts/test.conf",
+            "data/plugin-loader/conflicts/test.conf");
+        Rygel.MetaConfig.register_configuration (config);
+    } catch (Error error) {
+        critical("%s", error.message);
+        assert_not_reached ();
+    }
+
+    var loader = new TestPluginLoader("conflicts",
+                                      {"librygel-tracker.so", "librygel-no-conflict.so"},
+                                      {"librygel-tracker3.so"});
+    loader.load_modules_sync (null);
+    assert (loader.loaded_plugins.length == 2);
+    assert ("librygel-tracker.so" in loader.loaded_plugins);
+    assert ("librygel-no-conflict.so" in loader.loaded_plugins);
+}
+
+int main (string[] args) {
+    Test.init (ref args);
+
+    Test.add_func ("/librygel-core/plugins/load-conflict",
+                   test_plugin_loader_conflict);
+    return Test.run ();
+}
\ No newline at end of file