enhance: show real progress of git operations in running popups

src/Views/PopupRunningStatus.axaml

@@ -21,10 +21,21 @@
                FontStyle="Italic"
                Text="{Binding #ThisControl.Description}"/>
 
-    <ProgressBar x:Name="ProgressBar"
-                 Margin="0,8,0,0"
-                 HorizontalAlignment="Stretch"
-                 Background="{DynamicResource Brush.FG2}" Foreground="{DynamicResource Brush.Accent}"
-                 Minimum="0" Maximum="100"/>
+    <Grid Margin="0,8,0,0" ColumnDefinitions="*,Auto">
+      <ProgressBar Grid.Column="0"
+                   x:Name="ProgressBar"
+                   HorizontalAlignment="Stretch"
+                   Background="{DynamicResource Brush.FG2}" Foreground="{DynamicResource Brush.Accent}"
+                   Minimum="0" Maximum="100"/>
+
+      <TextBlock Grid.Column="1"
+                 x:Name="Percentage"
+                 Margin="8,0,0,0"
+                 MinWidth="32"
+                 TextAlignment="Right"
+                 VerticalAlignment="Center"
+                 FontSize="{Binding Source={x:Static vm:Preferences.Instance}, Path=DefaultFontSize, Converter={x:Static c:DoubleConverters.Decrease}}"
+                 IsVisible="False"/>
+    </Grid>
   </StackPanel>
 </UserControl>

src/Views/PopupRunningStatus.axaml.cs

@@ -1,3 +1,4 @@
+using System.Text.RegularExpressions;
 using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Controls.Shapes;
@@ -50,12 +51,17 @@ protected override void OnPropertyChanged(AvaloniaPropertyChangedEventArgs chang
                 else
                     StopAnim();
             }
+            else if (change.Property == DescriptionProperty)
+            {
+                if (IsVisible && !_isUnloading)
+                    UpdateProgress();
+            }
         }
 
         private void StartAnim()
         {
             Icon.Content = new Path() { Classes = { "waiting" } };
-            ProgressBar.IsIndeterminate = true;
+            UpdateProgress();
         }
 
         private void StopAnim()
@@ -64,9 +70,33 @@ private void StopAnim()
                 path.Classes.Clear();
             Icon.Content = null;
             ProgressBar.IsIndeterminate = false;
+            ProgressBar.Value = 0;
+            Percentage.IsVisible = false;
+        }
+
+        private void UpdateProgress()
+        {
+            // Git reports the progress of long-running operations as `<phase>: NN% (...)`. Only the
+            // percentage is used here, so it also works with translated phase names.
+            var match = string.IsNullOrEmpty(_description) ? null : REG_PROGRESS().Match(_description);
+            if (match is { Success: true } && int.TryParse(match.Groups[1].Value, out var percent) && percent <= 100)
+            {
+                ProgressBar.IsIndeterminate = false;
+                ProgressBar.Value = percent;
+                Percentage.Text = $"{percent}%";
+                Percentage.IsVisible = true;
+            }
+            else
+            {
+                ProgressBar.IsIndeterminate = true;
+                Percentage.IsVisible = false;
+            }
         }
 
         private string _description = string.Empty;
         private bool _isUnloading = false;
+
+        [GeneratedRegex(@"^[^%]+?:\s+(\d{1,3})%")]
+        private static partial Regex REG_PROGRESS();
     }
 }