Initial commit

AppStub/Program.cs

@@ -0,0 +1,78 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using System.Reflection;
+using System.Windows.Forms;
+using Katteker;
+
+namespace AppStub
+{
+    internal static class Program
+    {
+        [STAThread]
+        private static void Main(string[] args)
+        {
+            Application.EnableVisualStyles();
+            Application.SetCompatibleTextRenderingDefault(false);
+
+            try
+            {
+                var commandline = string.Join(" ", args);
+                var location = new FileInfo(Assembly.GetExecutingAssembly().Location);
+                var directory = location.Directory;
+                if (directory == null) return;
+                var files = directory.EnumerateFiles(location.Name, SearchOption.AllDirectories)
+                    .Where(x => x.Directory?.Name.StartsWith("app-") == true);
+
+                var entries = new SortedList<SemanticVersion, FileInfo>();
+
+                foreach (var file in files)
+                {
+                    var version = SemanticVersion.TryParse(file.Directory?.Name.Replace("app-", ""), out var value)
+                        ? value
+                        : new SemanticVersion(0);
+                    entries.Add(version, file);
+                }
+
+                var latestVersion = entries.LastOrDefault().Value;
+                if (latestVersion == null) throw new FileNotFoundException();
+                DeleteOldVersionDirectories(entries.Where(x => x.Value != latestVersion));
+                using (var process = new Process())
+                {
+                    process.StartInfo =
+                        new ProcessStartInfo(latestVersion.FullName)
+                        {
+                            Arguments = commandline,
+                            WorkingDirectory = latestVersion.DirectoryName ?? Assembly.GetExecutingAssembly().Location,
+                            UseShellExecute = false
+                        };
+                    process.Start();
+                    process.WaitForExit();
+                }
+            }
+            catch (Exception e)
+            {
+                MessageBox.Show(e.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private static void DeleteOldVersionDirectories(IEnumerable<KeyValuePair<SemanticVersion, FileInfo>> dirEntries)
+        {
+#if !DEBUG
+            foreach (var directoryInfo in dirEntries)
+            {
+                try
+                {
+                    directoryInfo.Value.Directory?.Delete(true);
+                }
+                catch
+                {
+                    // silently ignore
+                }
+            }
+#endif
+        }
+    }
+}