Copy preferences under Linux to add them to backup, notification messages

cura/Backups/Backup.py

@@ -7,7 +7,11 @@ import shutil
 from typing import Optional
 from zipfile import ZipFile, ZIP_DEFLATED, BadZipfile
 
+from UM import i18nCatalog
 from UM.Logger import Logger
+from UM.Message import Message
+from UM.Platform import Platform
+from UM.Preferences import Preferences
 from UM.Resources import Resources
 from cura.CuraApplication import CuraApplication
 
@@ -21,6 +25,9 @@ class Backup:
     # These files should be ignored when making a backup.
     IGNORED_FILES = {"cura.log", "cache"}
 
+    # Re-use translation catalog.
+    catalog = i18nCatalog("cura")
+
     def __init__(self, zip_file: bytes = None, meta_data: dict = None):
         self.zip_file = zip_file  # type: Optional[bytes]
         self.meta_data = meta_data  # type: Optional[dict]
@@ -31,10 +38,15 @@ class Backup:
         """
         cura_release = CuraApplication.getInstance().getVersion()
         version_data_dir = Resources.getDataStoragePath()
+        preferences_file_name = CuraApplication.getInstance().getApplicationName()
+        preferences_file = Resources.getPath(Resources.Preferences, "{}.cfg".format(preferences_file_name))
 
         Logger.log("d", "Creating backup for Cura %s, using folder %s", cura_release, version_data_dir)
-        
+
-        # TODO: support preferences file in backup under Linux (is in different directory).
+        # We copy the preferences file to the user data directory in Linux as it's in a different location there.
+        # When restoring a backup on Linux, we copy it back.
+        if Platform.isLinux():
+            shutil.copyfile(preferences_file, os.path.join(version_data_dir, "{}.cfg".format(preferences_file_name)))
 
         # Ensure all current settings are saved.
         CuraApplication.getInstance().saveSettings()
@@ -86,9 +98,15 @@ class Backup:
             return archive
         except (IOError, OSError, BadZipfile) as error:
             Logger.log("e", "Could not create archive from user data directory: %s", error)
-            # TODO: show message.
+            self._showMessage(
+                self.catalog.i18nc("@info:backup_failed",
+                                   "Could not create archive from user data directory: {}".format(error)))
             return None
 
+    def _showMessage(self, message: str) -> None:
+        """Show a UI message"""
+        Message(message, title=self.catalog.i18nc("@info:title", "Backup"), lifetime=30).show()
+
     def restore(self) -> bool:
         """
         Restore this backups
@@ -97,16 +115,23 @@ class Backup:
         if not self.zip_file or not self.meta_data or not self.meta_data.get("cura_release", None):
             # We can restore without the minimum required information.
             Logger.log("w", "Tried to restore a Cura backup without having proper data or meta data.")
-            # TODO: show message.
+            self._showMessage(
+                self.catalog.i18nc("@info:backup_failed",
+                                   "Tried to restore a Cura backup without having proper data or meta data."))
             return False
 
         # TODO: handle restoring older data version.
-        # TODO: support preferences file in backup under Linux (is in different directory).
-        # global_data_dir = os.path.dirname(version_data_dir)
 
         version_data_dir = Resources.getDataStoragePath()
         archive = ZipFile(io.BytesIO(self.zip_file), "r")
         extracted = self._extractArchive(archive, version_data_dir)
+
+        # Under Linux, preferences are stored elsewhere, so we copy the file to there.
+        preferences_file_name = CuraApplication.getInstance().getApplicationName()
+        preferences_file = Resources.getPath(Resources.Preferences, "{}.cfg".format(preferences_file_name))
+        if Platform.isLinux():
+            shutil.move(os.path.join(version_data_dir, "{}.cfg".format(preferences_file)), preferences_file)
+
         return extracted
 
     @staticmethod