refactor<*>: rewrite all with AvaloniaUI

src/Native/OS.cs

@@ -0,0 +1,79 @@
+using System;
+using System.Diagnostics;
+using System.IO;
+
+namespace SourceGit.Native {
+    public static class OS {
+        public interface IBackend {
+            string FindGitInstallDir();
+            string FindVSCode();
+
+            void OpenTerminal(string workdir);
+            void OpenInFileManager(string path, bool select);
+            void OpenBrowser(string url);
+            void OpenWithDefaultEditor(string file);
+        }
+
+        public static string GitInstallDir {
+            get;
+            set;
+        }
+
+        public static string GitExecutableFile {
+            get => Path.Combine(GitInstallDir, "bin", OperatingSystem.IsWindows() ? "git.exe" : "git");
+        }
+
+        public static string VSCodeExecutableFile {
+            get;
+            set;
+        }
+
+        static OS() {
+            if (OperatingSystem.IsMacOS()) {
+                _backend = new MacOS();
+                VSCodeExecutableFile = _backend.FindVSCode();
+            } else if (OperatingSystem.IsWindows()) {
+                _backend = new Windows();
+                VSCodeExecutableFile = _backend.FindVSCode();
+            } else {
+                throw new Exception("Platform unsupported!!!");
+            }
+        }
+
+        public static string FindGitInstallDir() {
+            return _backend?.FindGitInstallDir();
+        }
+
+        public static void OpenInFileManager(string path, bool select = false) {
+            _backend?.OpenInFileManager(path, select);
+        }
+
+        public static void OpenBrowser(string url) {
+            _backend?.OpenBrowser(url);
+        }
+
+        public static void OpenTerminal(string workdir) {
+            _backend?.OpenTerminal(workdir);
+        }
+
+        public static void OpenWithDefaultEditor(string file) {
+            _backend?.OpenWithDefaultEditor(file);
+        }
+
+        public static void OpenInVSCode(string repo) {
+            if (string.IsNullOrEmpty(VSCodeExecutableFile)) {
+                App.RaiseException(repo, "Visual Studio Code can NOT be found in your system!!!");
+                return;
+            }
+
+            Process.Start(new ProcessStartInfo() {
+                WorkingDirectory = repo,
+                FileName = VSCodeExecutableFile,
+                Arguments = $"\"{repo}\"",
+                UseShellExecute = false,
+            });
+        }
+
+        private static IBackend _backend = null;
+    }
+}