Prints number of minutes to only 1 decimal place

Prints the backup/restore/image mount durations as the number of minutes to
only 1 decimal place, rather than the much larger default print precision of
floating point numbers in Python.

src/apps/rescuezilla/rescuezilla/usr/lib/python3/dist-packages/rescuezilla/backup_manager.py

@@ -760,7 +760,7 @@ def update_backup_progress_bar(self, fraction):
 
     def completed_backup(self, succeeded, message):
         backup_timeend = datetime.now()
-        duration_minutes = (backup_timeend - self.backup_timestart).total_seconds() / 60.0
+        duration_minutes = Utility.get_human_readable_minutes_seconds((backup_timeend - self.backup_timestart).total_seconds())
         duration_message = _("Operation took {num_minutes} minutes.").format(num_minutes=duration_minutes)
         self.main_statusbar.remove_all(self.main_statusbar.get_context_id("backup"))
 

src/apps/rescuezilla/rescuezilla/usr/lib/python3/dist-packages/rescuezilla/image_explorer_manager.py

@@ -17,7 +17,6 @@
 #   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 # ----------------------------------------------------------------------
 import collections
-import math
 import os
 import queue
 import shutil
@@ -616,12 +615,9 @@ def _do_mount_command(self, please_wait_popup, callback, image, partition_key, d
                 return
 
             backup_timeend = datetime.now()
-            duration_minutes, duration_seconds = divmod((backup_timeend - backup_timestart).total_seconds(), 60)
-            frac, whole = math.modf(duration_minutes / 60)
-            # 1 decimal place (55.3 minutes)
-            human_readable_minutes_seconds = "{:.1f}".format(duration_minutes + frac)
+            duration_minutes = Utility.get_human_readable_minutes_seconds((backup_timeend - backup_timestart).total_seconds())
             duration_message = _("Mounting partition took {num_minutes} minutes.").format(
-                num_minutes=human_readable_minutes_seconds)
+                num_minutes=duration_minutes)
             GLib.idle_add(callback, True, duration_message)
             GLib.idle_add(please_wait_popup.destroy)
         except Exception as e:

src/apps/rescuezilla/rescuezilla/usr/lib/python3/dist-packages/rescuezilla/restore_manager.py

@@ -1099,7 +1099,7 @@ def update_progress_bar(self, fraction):
     # Expected to run on GTK event thread
     def completed_restore(self, succeeded, message):
         restore_timeend = datetime.now()
-        duration_minutes = (restore_timeend - self.restore_timestart).total_seconds() / 60.0
+        duration_minutes = Utility.get_human_readable_minutes_seconds((restore_timeend - self.restore_timestart).total_seconds())
 
         self.main_statusbar.remove_all(self.main_statusbar.get_context_id("restore"))
         self.restore_in_progress = False

src/apps/rescuezilla/rescuezilla/usr/lib/python3/dist-packages/rescuezilla/utility.py

@@ -17,6 +17,7 @@
 #   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 # ----------------------------------------------------------------------
 import gettext
+import math
 import os
 import pwd
 import re
@@ -418,6 +419,13 @@ def print_cli_friendly(message, cmd_list_list):
         print(flat_command_string)
         return flat_command_string
 
+    @staticmethod
+    def get_human_readable_minutes_seconds(seconds):
+        duration_minutes, duration_seconds = divmod(seconds, 60)
+        frac, whole = math.modf(duration_minutes / 60)
+        # 1 decimal place (55.3 minutes)
+        return "{:.1f}".format(duration_minutes + frac)
+
     @staticmethod
     def run(short_description, cmd_list, use_c_locale, output_filepath=None, logger=None):
         if use_c_locale: