add the standard mechanism for search paths to the path used for export formats, so that we can find them in a bundle

git-svn-id: svn://localhost/ardour2/branches/3.0@9261 d708f5d6-7413-0410-9779-e7cbd77b26cf

libs/ardour/ardour/directory_names.h

@@ -15,6 +15,7 @@ extern const char* const dead_dir_name;
 extern const char* const interchange_dir_name;
 extern const char* const peak_dir_name;
 extern const char* const export_dir_name;
+extern const char* const export_formats_dir_name;
 extern const char* const templates_dir_name;
 extern const char* const route_templates_dir_name;
 extern const char* const surfaces_dir_name;

libs/ardour/ardour/export_formats_search_path.h

@@ -0,0 +1,39 @@
+/*
+    Copyright (C) 2011 Paul Davis
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#ifndef __ardour_export_formats_search_path_h__
+#define __ardour_export_formats_search_path_h__
+
+#include "pbd/search_path.h"
+
+namespace ARDOUR {
+
+	/**
+	 * return a SearchPath containing directories in which to look for
+	 * export_formats.
+	 *
+	 * If ARDOUR_EXPORT_FORMATS_PATH is defined then the SearchPath returned
+	 * will contain only those directories specified in it, otherwise it will
+	 * contain the user and system directories which may contain control
+	 * surface plugins.
+	 */
+	PBD::SearchPath export_formats_search_path ();
+
+} // namespace ARDOUR
+
+#endif /* __ardour_export_formats_search_path_h__ */

libs/ardour/directory_names.cc

@@ -12,6 +12,7 @@ const char* const peak_dir_name = X_("peaks");
 const char* const dead_dir_name = X_("dead");
 const char* const interchange_dir_name = X_("interchange");
 const char* const export_dir_name = X_("export");
+const char* const export_formats_dir_name = X_("export");
 const char* const templates_dir_name = X_("templates");
 const char* const route_templates_dir_name = X_("route_templates");
 const char* const surfaces_dir_name = X_("surfaces");

libs/ardour/export_formats_search_path.cc

@@ -0,0 +1,52 @@
+/*
+    Copyright (C) 2007 Tim Mayberry
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include <glibmm/miscutils.h>
+
+#include "ardour/export_formats_search_path.h"
+#include "ardour/directory_names.h"
+#include "ardour/filesystem_paths.h"
+
+namespace {
+	const char * const export_env_variable_name = "ARDOUR_EXPORT_FORMATS_PATH";
+} // anonymous
+
+using namespace PBD;
+
+namespace ARDOUR {
+
+SearchPath
+export_formats_search_path ()
+{
+	bool export_path_defined = false;
+	SearchPath spath_env (Glib::getenv(export_env_variable_name, export_path_defined));
+
+	if (export_path_defined) {
+		return spath_env;
+	}
+
+	SearchPath spath (user_config_directory ());
+
+	spath += ardour_module_directory ();
+	spath.add_subdirectory_to_paths (export_formats_dir_name);
+
+	return spath;
+}
+
+} // namespace ARDOUR

libs/ardour/export_profile_manager.cc

@@ -29,6 +29,7 @@
 
 #include "ardour/export_profile_manager.h"
 #include "ardour/export_format_specification.h"
+#include "ardour/export_formats_search_path.h"
 #include "ardour/export_timespan.h"
 #include "ardour/export_channel_configuration.h"
 #include "ardour/export_filename.h"
@@ -60,14 +61,12 @@ ExportProfileManager::ExportProfileManager (Session & s, std::string xml_node_na
 
   , format_list (new FormatList ())
 {
-
 	/* Initialize path variables */
 
 	export_config_dir = user_config_directory();
 	export_config_dir /= "export";
 
-	search_path += export_config_dir;
-	search_path += system_data_search_path().add_subdirectory_to_paths("export");
+	search_path += export_formats_search_path();
 
 	info << string_compose (_("Searching for export formats in %1"), search_path.to_string()) << endmsg;
 

libs/ardour/wscript

@@ -88,6 +88,7 @@ libardour_sources = [
         'export_format_manager.cc',
         'export_format_specification.cc',
         'export_formats.cc',
+        'export_formats_search_path.cc',
         'export_graph_builder.cc',
         'export_handler.cc',
         'export_preset.cc',