+std::string
+user_cache_directory ()
+{
+ static std::string p;
+
+ if (!p.empty()) return p;
+
+#ifdef __APPLE__
+ p = Glib::build_filename (Glib::get_home_dir(), "Library/Caches");
+#else
+ const char* c = 0;
+
+ /* adopt freedesktop standards, and put .ardour3 into $XDG_CACHE_HOME
+ * defaulting to or ~/.config
+ */
+ if ((c = getenv ("XDG_CACHE_HOME")) != 0) {
+ p = c;
+ } else {
+
+#ifdef PLATFORM_WINDOWS
+ // Not technically the home dir (since it needs to be a writable folder)
+ const string home_dir = Glib::get_user_data_dir();
+#else
+ const string home_dir = Glib::get_home_dir();
+#endif
+ if (home_dir.empty ()) {
+ error << "Unable to determine home directory" << endmsg;
+ exit (1);
+ }
+ p = home_dir;
+
+#ifndef PLATFORM_WINDOWS
+ p = Glib::build_filename (p, ".cache");
+#endif
+
+ }
+#endif // end not __APPLE__
+
+ p = Glib::build_filename (p, user_config_dir_name);
+
+#ifdef PLATFORM_WINDOWS
+ /* On Windows Glib::get_user_data_dir is the folder to use for local
+ * (as opposed to roaming) application data.
+ * See documentation for CSIDL_LOCAL_APPDATA.
+ * Glib::get_user_data_dir() == GLib::get_user_config_dir()
+ * so we add an extra subdir *below* the config dir.
+ */
+ p = Glib::build_filename (p, "cache");
+#endif
+
+ if (!Glib::file_test (p, Glib::FILE_TEST_EXISTS)) {
+ if (g_mkdir_with_parents (p.c_str(), 0755)) {
+ error << string_compose (_("Cannot create cache directory %1 - cannot run"),
+ p) << endmsg;
+ exit (1);
+ }
+ } else if (!Glib::file_test (p, Glib::FILE_TEST_IS_DIR)) {
+ error << string_compose (_("Cache directory %1 already exists and is not a directory/folder - cannot run"),
+ p) << endmsg;
+ exit (1);
+ }
+
+ return p;
+}
+