Set executable permissions for linux updater

StabilityMatrix.Avalonia/Program.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
+using System.IO;
 using System.Linq;
 using System.Reflection;
 using System.Runtime.InteropServices;
@@ -89,6 +90,12 @@ public class Program
                 {
                     currentExe.CopyTo(targetExe, true);
                     
+                    // Ensure permissions are set for unix
+                    if (Compat.IsUnix)
+                    {
+                        File.SetUnixFileMode(targetExe, (UnixFileMode) 0x755);
+                    }
+                    
                     // Start the new app
                     Process.Start(targetExe);
                     

StabilityMatrix.Avalonia/ViewModels/Dialogs/UpdateViewModel.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Diagnostics;
+using System.IO;
 using System.Net.Http;
 using System.Threading.Tasks;
 using AsyncAwaitBestPractices;
@@ -78,6 +79,12 @@ public partial class UpdateViewModel : ContentDialogViewModelBase
             ProgressValue = Convert.ToInt32(report.Percentage);
         }));
         
+        // On unix, we need to set the executable bit
+        if (Compat.IsUnix)
+        {
+            File.SetUnixFileMode(UpdateHelper.ExecutablePath, (UnixFileMode) 0x755);
+        }
+        
         UpdateText = "Update complete. Restarting Stability Matrix in 3 seconds...";
         await Task.Delay(1000);
         UpdateText = "Update complete. Restarting Stability Matrix in 2 seconds...";

StabilityMatrix.Core/Updater/UpdateHelper.cs

@@ -35,14 +35,14 @@ public class UpdateHelper : IUpdateHelper
         this.downloadService = downloadService;
         this.debugOptions = debugOptions.Value;
         
-        timer.Elapsed += async (_, _) => { await CheckForUpdate(); };
+        timer.Elapsed += async (_, _) => { await CheckForUpdate().ConfigureAwait(false); };
     }
 
     public async Task StartCheckingForUpdates()
     {
         timer.Enabled = true;
         timer.Start();
-        await CheckForUpdate();
+        await CheckForUpdate().ConfigureAwait(false);
     }
 
     public async Task DownloadUpdate(UpdateInfo updateInfo,
@@ -54,7 +54,7 @@ public class UpdateHelper : IUpdateHelper
         
         // download the file from URL
         await downloadService.DownloadToFileAsync(downloadUrl, ExecutablePath, progress: progress,
-            httpClientName: "UpdateClient");
+            httpClientName: "UpdateClient").ConfigureAwait(false);
     }
 
 
@@ -77,17 +77,18 @@ public class UpdateHelper : IUpdateHelper
         try
         {
             var httpClient = httpClientFactory.CreateClient("UpdateClient");
-            var response = await httpClient.GetAsync(UpdateManifestUrl);
+            var response = await httpClient.GetAsync(UpdateManifestUrl).ConfigureAwait(false);
             if (!response.IsSuccessStatusCode)
             {
                 logger.LogWarning("Error while checking for update {StatusCode} - {Content}", 
-                    response.StatusCode, await response.Content.ReadAsStringAsync());
+                    response.StatusCode, await response.Content.ReadAsStringAsync().ConfigureAwait(false));
                 return;
             }
 
             var updateCollection =
                 await JsonSerializer.DeserializeAsync<UpdateCollection>(
-                    await response.Content.ReadAsStreamAsync());
+                    await response.Content.ReadAsStreamAsync()
+                        .ConfigureAwait(false)).ConfigureAwait(false);
 
             if (updateCollection is null)
             {