auto-backup: libardour part. (from mixbus)

5 files changed, 43 insertions, 0 deletions

diff --git a/libs/ardour/ardour/directory_names.h b/libs/ardour/ardour/directory_names.h
index a671ee0b2e..69096e51ea 100644
--- a/libs/ardour/ardour/directory_names.h
+++ b/libs/ardour/ardour/directory_names.h
@@ -35,6 +35,7 @@ namespace ARDOUR {
 	LIBARDOUR_API extern const char* const interchange_dir_name;
 	LIBARDOUR_API extern const char* const peak_dir_name;
 	LIBARDOUR_API extern const char* const export_dir_name;
+	LIBARDOUR_API extern const char* const backup_dir_name;
 	LIBARDOUR_API extern const char* const export_formats_dir_name;
 	LIBARDOUR_API extern const char* const plugin_metadata_dir_name;
 	LIBARDOUR_API extern const char* const templates_dir_name;
diff --git a/libs/ardour/ardour/session_directory.h b/libs/ardour/ardour/session_directory.h
index 6f4126e0bb..75740090a4 100644
--- a/libs/ardour/ardour/session_directory.h
+++ b/libs/ardour/ardour/session_directory.h
@@ -108,6 +108,12 @@ public:
 	const std::string export_path () const;
 
 	/**
+	 * @return The absolute path to the directory that backup
+	 * session files are stored.
+	 */
+	const std::string backup_path () const;
+
+	/**
 	 * @return true if session directory and all the required
 	 * subdirectories exist.
 	 */
diff --git a/libs/ardour/directory_names.cc b/libs/ardour/directory_names.cc
index 574929f3a1..9ace7934f8 100644
--- a/libs/ardour/directory_names.cc
+++ b/libs/ardour/directory_names.cc
@@ -32,6 +32,7 @@ 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 backup_dir_name = X_("backup");
 const char* const export_formats_dir_name = X_("export");
 const char* const templates_dir_name = X_("templates");
 const char* const plugin_metadata_dir_name = X_("plugin_metadata");
diff --git a/libs/ardour/session_directory.cc b/libs/ardour/session_directory.cc
index c52fe1aeb5..1f6b991f82 100644
--- a/libs/ardour/session_directory.cc
+++ b/libs/ardour/session_directory.cc
@@ -245,6 +245,12 @@ SessionDirectory::export_path () const
 	return Glib::build_filename (m_root_path, export_dir_name);
 }
 
+const std::string
+SessionDirectory::backup_path () const
+{
+	return Glib::build_filename (m_root_path, backup_dir_name);
+}
+
 const vector<std::string>
 SessionDirectory::sub_directories () const
 {
@@ -256,6 +262,7 @@ SessionDirectory::sub_directories () const
 	tmp_paths.push_back (peak_path ());
 	tmp_paths.push_back (dead_path ());
 	tmp_paths.push_back (export_path ());
+	tmp_paths.push_back (backup_path ());
 
 	return tmp_paths;
 }
diff --git a/libs/ardour/session_state.cc b/libs/ardour/session_state.cc
index b27a292642..6eb06d8c35 100644
--- a/libs/ardour/session_state.cc
+++ b/libs/ardour/session_state.cc
@@ -749,6 +749,8 @@ Session::remove_state (string snapshot_name)
 		error << string_compose(_("Could not remove session file at path \"%1\" (%2)"),
 				xml_path, g_strerror (errno)) << endmsg;
 	}
+
+	StateSaved (snapshot_name); /* EMIT SIGNAL */
 }
 
 /** @param snapshot_name Name to save under, without .ardour / .pending prefix */
@@ -873,6 +875,32 @@ Session::save_state (string snapshot_name, bool pending, bool switch_to_snapshot
 		}
 	}
 
+	//Mixbus auto-backup mechanism
+	if(Profile->get_mixbus()) {
+		if (pending) {  //"pending" save means it's a backup, or some other non-user-initiated save;  a good time to make a backup
+			// make a serialized safety backup
+			// (will make one periodically but only one per hour is left on disk)
+			// these backup files go into a separated folder
+			char timebuf[128];
+			time_t n;
+			struct tm local_time;
+			time (&n);
+			localtime_r (&n, &local_time);
+			strftime (timebuf, sizeof(timebuf), "%y-%m-%d.%H", &local_time);
+			std::string save_path(session_directory().backup_path());
+			save_path += G_DIR_SEPARATOR;
+			save_path += legalize_for_path(_current_snapshot_name);
+			save_path += "-";
+			save_path += timebuf;
+			save_path += statefile_suffix;
+			if ( !tree.write (save_path) )
+					error << string_compose(_("Could not save backup file at path \"%1\" (%2)"),
+							save_path, g_strerror (errno)) << endmsg;
+		}
+
+		StateSaved (snapshot_name); /* EMIT SIGNAL */
+	}
+
 	if (!pending && !for_archive) {
 
 		save_history (snapshot_name);