[gnome-builder] glade: discover catalog paths from build runtime/prefix

[Christian Hergert <chergert src gnome org>]

commit e314cd5089598ab1982870239762bc2766aad509
Author: Christian Hergert <chergert redhat com>
Date:   Tue Oct 23 16:57:49 2018 -0700

    glade: discover catalog paths from build runtime/prefix
    
    This tries to locate some information about the catalogs from the build
    runtime and installation prefix. It's somewhat problematic in that
    accessing libraries and what not is not necessarily possible. But we can
    start here and see how things work out.

 src/plugins/glade/gbp-glade-workbench-addin.c | 118 ++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
---
diff --git a/src/plugins/glade/gbp-glade-workbench-addin.c b/src/plugins/glade/gbp-glade-workbench-addin.c
index 61ad4a418..6916567ef 100644
--- a/src/plugins/glade/gbp-glade-workbench-addin.c
+++ b/src/plugins/glade/gbp-glade-workbench-addin.c
@@ -29,6 +29,7 @@ struct _GbpGladeWorkbenchAddin
 {
   GObject parent_instance;
   IdeWorkbench *workbench;
+  GHashTable *catalog_paths;
 };
 
 typedef struct
@@ -182,16 +183,112 @@ gbp_glade_workbench_addin_open_finish (IdeWorkbenchAddin  *addin,
   return ide_task_propagate_boolean (IDE_TASK (result), error);
 }
 
+static void
+on_build_pipeline_changed_cb (GbpGladeWorkbenchAddin *self,
+                              GParamSpec             *pspec,
+                              IdeBuildManager        *build_manager)
+{
+  IdeBuildPipeline *pipeline;
+  GHashTableIter iter;
+  const gchar *key;
+
+  g_assert (GBP_IS_GLADE_WORKBENCH_ADDIN (self));
+  g_assert (IDE_IS_BUILD_MANAGER (build_manager));
+
+  g_hash_table_iter_init (&iter, self->catalog_paths);
+  while (g_hash_table_iter_next (&iter, (gpointer *)&key, NULL))
+    {
+      g_debug ("Removing catalogs from: %s", key);
+      glade_catalog_remove_path (key);
+      g_hash_table_iter_remove (&iter);
+    }
+
+  /* Get path from the installation prefix in the build runtime. */
+
+  pipeline = ide_build_manager_get_pipeline (build_manager);
+
+  if (pipeline != NULL)
+    {
+      IdeConfiguration *config = ide_build_pipeline_get_configuration (pipeline);
+      IdeRuntime *runtime = ide_build_pipeline_get_runtime (pipeline);
+      g_autoptr(GFile) translated = NULL;
+      g_autoptr(GFile) catalog_file = NULL;
+
+      if (config != NULL)
+        {
+          const gchar *prefix = ide_configuration_get_prefix (config);
+          g_autofree gchar *path = g_build_filename (prefix, "share/glade/catalogs", NULL);
+
+          if (!g_hash_table_contains (self->catalog_paths, path))
+            {
+              g_debug ("Adding catalogs from installation prefix: %s", path);
+              glade_catalog_add_path (path);
+              g_hash_table_insert (self->catalog_paths, g_steal_pointer (&path), NULL);
+            }
+        }
+
+      /*
+       * Get the path to the default installation path
+       * (/usr/share/glade/catalogs) for catalogs in the runtime. We just
+       * assume the natural /usr here since we deal with alternate installation
+       * paths above.
+       */
+
+      if (runtime != NULL)
+        {
+          const gchar *path;
+
+          catalog_file = g_file_new_for_path ("/usr/share/glade/catalogs");
+          translated = ide_runtime_translate_file (runtime, catalog_file);
+          path = g_file_peek_path (translated);
+
+          if (!g_hash_table_contains (self->catalog_paths, path))
+            {
+              g_debug ("Adding catalogs from runtime: %s", path);
+              glade_catalog_add_path (path);
+              g_hash_table_insert (self->catalog_paths, g_strdup (path), NULL);
+            }
+        }
+    }
+}
+
 static void
 gbp_glade_workbench_addin_load (IdeWorkbenchAddin *addin,
                                 IdeWorkbench      *workbench)
 {
   GbpGladeWorkbenchAddin *self = (GbpGladeWorkbenchAddin *)addin;
+  IdeBuildManager *build_manager;
+  IdeContext *context;
 
   g_assert (GBP_IS_GLADE_WORKBENCH_ADDIN (self));
   g_assert (IDE_IS_WORKBENCH (workbench));
 
   self->workbench = workbench;
+  self->catalog_paths = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
+
+  /*
+   * We want to watch the build pipeline for changes to the current
+   * runtime, so that we can update the glade catalog paths based
+   * on the installation prefix.
+   *
+   * For example, if we get "/opt/gnome" as a prefix, we want to get
+   * the catalog path from "/opt/gnome/share/glade/catalogs/". Or if we
+   * get "/app" we want "/app/share/glade/catalogs/". We also need to
+   * translate the path to something we can locate on the host, in case
+   * the runtime is a foreign mount.
+   */
+
+  context = ide_workbench_get_context (workbench);
+  build_manager = ide_context_get_build_manager (context);
+
+  g_signal_connect_object (build_manager,
+                           "notify::pipeline",
+                           G_CALLBACK (on_build_pipeline_changed_cb),
+                           self,
+                           G_CONNECT_SWAPPED);
+
+  /* Update catalogs */
+  on_build_pipeline_changed_cb (self, NULL, build_manager);
 }
 
 static void
@@ -199,10 +296,31 @@ gbp_glade_workbench_addin_unload (IdeWorkbenchAddin *addin,
                                   IdeWorkbench      *workbench)
 {
   GbpGladeWorkbenchAddin *self = (GbpGladeWorkbenchAddin *)addin;
+  IdeBuildManager *build_manager;
+  IdeContext *context;
+  const gchar *path;
+  GHashTableIter iter;
 
   g_assert (GBP_IS_GLADE_WORKBENCH_ADDIN (self));
   g_assert (IDE_IS_WORKBENCH (workbench));
 
+  context = ide_workbench_get_context (workbench);
+  build_manager = ide_context_get_build_manager (context);
+
+  g_signal_handlers_disconnect_by_func (build_manager,
+                                        G_CALLBACK (on_build_pipeline_changed_cb),
+                                        self);
+
+  g_hash_table_iter_init (&iter, self->catalog_paths);
+  while (g_hash_table_iter_next (&iter, (gpointer *)&path, NULL))
+    {
+      g_debug ("Removing catalogs from: %s", path);
+      glade_catalog_remove_path (path);
+      g_hash_table_iter_remove (&iter);
+    }
+
+  g_clear_pointer (&self->catalog_paths, g_hash_table_unref);
+
   self->workbench = NULL;
 }