Fully reset plugin struct when plugin is reloaded

This fixes a bug where, for example, after re-loading a plugin from a
different bundle, the LilvPlugin would still report the old bundle.

Also never replace a newer version with an older version when a bundle
is loaded.  Ignores the entire bundle if an older plugin than one loaded
is found.  This is tricky because the unit of loading/unloading is a
bundle, and the unit of versioning is a plugin, but since having data
from an old bundle still loaded seems like a bad idea, this seems like
the most correct behaviour.

3 files changed, 57 insertions, 26 deletions

diff --git a/src/lilv_internal.h b/src/lilv_internal.h
index ea96418..5abfcd4 100644
--- a/src/lilv_internal.h
+++ b/src/lilv_internal.h
@@ -1,5 +1,5 @@
 /*
-  Copyright 2007-2015 David Robillard <http://drobilla.net>
+  Copyright 2007-2016 David Robillard <http://drobilla.net>
 
   Permission to use, copy, modify, and/or distribute this software for any
   purpose with or without fee is hereby granted, provided that the above
@@ -257,6 +257,7 @@ void      lilv_port_free(const LilvPlugin* plugin, LilvPort* port);
 LilvPlugin* lilv_plugin_new(LilvWorld* world,
                             LilvNode*  uri,
                             LilvNode*  bundle_uri);
+void        lilv_plugin_clear(LilvPlugin* plugin, LilvNode* bundle_uri);
 void        lilv_plugin_load_if_necessary(const LilvPlugin* p);
 void        lilv_plugin_free(LilvPlugin* plugin);
 LilvNode*   lilv_plugin_get_unique(const LilvPlugin* p,
@@ -428,6 +429,10 @@ static const LV2_Feature* const dman_features = { NULL };
                                       __func__)
 #define LILV_WARNF(fmt, ...)  fprintf(stderr, "%s(): warning: " fmt, \
                                       __func__, __VA_ARGS__)
+#define LILV_NOTE(str)        fprintf(stderr, "%s(): note: " str, \
+                                      __func__)
+#define LILV_NOTEF(fmt, ...)  fprintf(stderr, "%s(): note: " fmt, \
+                                      __func__, __VA_ARGS__)
 
 #ifdef __cplusplus
 }
diff --git a/src/plugin.c b/src/plugin.c
index 837fd62..58cee88 100644
--- a/src/plugin.c
+++ b/src/plugin.c
@@ -1,5 +1,5 @@
 /*
-  Copyright 2007-2014 David Robillard <http://drobilla.net>
+  Copyright 2007-2016 David Robillard <http://drobilla.net>
 
   Permission to use, copy, modify, and/or distribute this software for any
   purpose with or without fee is hereby granted, provided that the above
@@ -32,14 +32,9 @@
 #define NS_DOAP (const uint8_t*)"http://usefulinc.com/ns/doap#"
 #define NS_FOAF (const uint8_t*)"http://xmlns.com/foaf/0.1/"
 
-/** Ownership of `uri` is taken */
-LilvPlugin*
-lilv_plugin_new(LilvWorld* world, LilvNode* uri, LilvNode* bundle_uri)
+static void
+lilv_plugin_init(LilvPlugin* plugin, LilvNode* bundle_uri)
 {
-	assert(bundle_uri);
-	LilvPlugin* plugin = (LilvPlugin*)malloc(sizeof(LilvPlugin));
-	plugin->world        = world;
-	plugin->plugin_uri   = uri;
 	plugin->bundle_uri   = bundle_uri;
 	plugin->binary_uri   = NULL;
 #ifdef LILV_DYN_MANIFEST
@@ -52,10 +47,30 @@ lilv_plugin_new(LilvWorld* world, LilvNode* uri, LilvNode* bundle_uri)
 	plugin->loaded       = false;
 	plugin->parse_errors = false;
 	plugin->replaced     = false;
+}
 
+/** Ownership of `uri` and `bundle` is taken */
+LilvPlugin*
+lilv_plugin_new(LilvWorld* world, LilvNode* uri, LilvNode* bundle_uri)
+{
+	LilvPlugin* plugin = (LilvPlugin*)malloc(sizeof(LilvPlugin));
+
+	plugin->world      = world;
+	plugin->plugin_uri = uri;
+
+	lilv_plugin_init(plugin, bundle_uri);
 	return plugin;
 }
 
+void
+lilv_plugin_clear(LilvPlugin* plugin, LilvNode* bundle_uri)
+{
+	lilv_node_free(plugin->bundle_uri);
+	lilv_node_free(plugin->binary_uri);
+	lilv_nodes_free(plugin->data_uris);
+	lilv_plugin_init(plugin, bundle_uri);
+}
+
 static void
 lilv_plugin_free_ports(LilvPlugin* p)
 {
diff --git a/src/world.c b/src/world.c
index d08e32d..e1f40c8 100644
--- a/src/world.c
+++ b/src/world.c
@@ -1,5 +1,5 @@
 /*
-  Copyright 2007-2015 David Robillard <http://drobilla.net>
+  Copyright 2007-2016 David Robillard <http://drobilla.net>
 
   Permission to use, copy, modify, and/or distribute this software for any
   purpose with or without fee is hereby granted, provided that the above
@@ -23,6 +23,9 @@
 
 #include "lilv_internal.h"
 
+static int
+lilv_world_drop_graph(LilvWorld* world, const SordNode* graph);
+
 LILV_API LilvWorld*
 lilv_world_new(void)
 {
@@ -415,7 +418,7 @@ lilv_world_add_plugin(LilvWorld*      world,
 		zix_tree_remove(world->zombies, z);
 		zix_tree_insert((ZixTree*)world->plugins, plugin, NULL);
 		lilv_node_free(plugin_uri);
-		plugin->loaded = false;
+		lilv_plugin_clear(plugin, lilv_node_new_from_node(world, bundle));
 	} else {
 		// Add new plugin to the world
 		plugin = lilv_plugin_new(
@@ -720,16 +723,30 @@ lilv_world_load_bundle(LilvWorld* world, const LilvNode* bundle_uri)
 		LilvVersion last_version = get_version(world, last_model, plugin_uri);
 		sord_free(this_model);
 		sord_free(last_model);
-		if (lilv_version_cmp(&this_version, &last_version) > 0) {
+		const int cmp = lilv_version_cmp(&this_version, &last_version);
+		if (cmp > 0) {
 			zix_tree_insert((ZixTree*)unload_uris,
 			                lilv_node_duplicate(plugin_uri),
 			                NULL);
-			LILV_WARNF("Version %d.%d of <%s> in <%s> replaces %d.%d in <%s>\n",
+			LILV_WARNF("Replacing version %d.%d of <%s> from <%s>\n",
+			           last_version.minor, last_version.micro,
+			           sord_node_get_string(plug),
+			           sord_node_get_string(last_bundle->node));
+			LILV_NOTEF("New version %d.%d found in <%s>\n",
 			           this_version.minor, this_version.micro,
+			           sord_node_get_string(bundle_node));
+		} else if (cmp < 0) {
+			LILV_WARNF("Ignoring bundle <%s>\n",
+			           sord_node_get_string(bundle_node));
+			LILV_NOTEF("Newer version of <%s> loaded from <%s>\n",
 			           sord_node_get_string(plug),
-			           sord_node_get_string(bundle_node),
-			           last_version.minor, last_version.micro,
 			           sord_node_get_string(last_bundle->node));
+			lilv_node_free(plugin_uri);
+			sord_iter_free(plug_results);
+			lilv_world_drop_graph(world, bundle_node);
+			lilv_node_free(manifest);
+			lilv_nodes_free(unload_uris);
+			return;
 		}
 		lilv_node_free(plugin_uri);
 	}
@@ -749,12 +766,6 @@ lilv_world_load_bundle(LilvWorld* world, const LilvNode* bundle_uri)
 		                lilv_node_duplicate(bundle),
 		                NULL);
 
-		// Remove plugin from zombies list
-		ZixTreeIter* z;
-		if ((z = lilv_collection_find_by_uri(world->zombies, uri))) {
-			lilv_plugin_free((LilvPlugin*)zix_tree_get(z));
-			zix_tree_remove(world->zombies, z);
-		}
 	}
 	lilv_nodes_free(unload_uris);
 
@@ -799,14 +810,14 @@ lilv_world_load_bundle(LilvWorld* world, const LilvNode* bundle_uri)
 }
 
 static int
-lilv_world_drop_graph(LilvWorld* world, const LilvNode* graph)
+lilv_world_drop_graph(LilvWorld* world, const SordNode* graph)
 {
-	SordIter* i = sord_search(world->model, NULL, NULL, NULL, graph->node);
+	SordIter* i = sord_search(world->model, NULL, NULL, NULL, graph);
 	while (!sord_iter_end(i)) {
 		const SerdStatus st = sord_erase(world->model, i);
 		if (st) {
 			LILV_ERRORF("Error removing statement from <%s> (%s)\n",
-			            lilv_node_as_uri(graph), serd_strerror(st));
+			            sord_node_get_string(graph), serd_strerror(st));
 			return st;
 		}
 	}
@@ -875,7 +886,7 @@ lilv_world_unload_bundle(LilvWorld* world, const LilvNode* bundle_uri)
 	}
 
 	// Drop everything in bundle graph
-	return lilv_world_drop_graph(world, bundle_uri);
+	return lilv_world_drop_graph(world, bundle_uri->node);
 }
 
 static void
@@ -1108,7 +1119,7 @@ lilv_world_unload_resource(LilvWorld*      world,
 		if (sord_node_get_type(file) != SORD_URI) {
 			LILV_ERRORF("rdfs:seeAlso node `%s' is not a URI\n",
 			            sord_node_get_string(file));
-		} else if (!lilv_world_drop_graph(world, file_node)) {
+		} else if (!lilv_world_drop_graph(world, file_node->node)) {
 			lilv_world_unload_file(world, file_node);
 			++n_dropped;
 		}