feature: external editor supports Sublime Text

src/Native/MacOS.cs

@@ -68,6 +68,18 @@ namespace SourceGit.Native
                 });
             }
 
+            var sublime = FindSublimeText();
+            if (!string.IsNullOrEmpty(sublime) && File.Exists(sublime))
+            {
+                editors.Add(new Models.ExternalEditor
+                {
+                    Name = "Sublime Text",
+                    Icon = "sublime_text.png",
+                    Executable = sublime,
+                    OpenCmdArgs = "\"{0}\"",
+                });
+            }
+
             return editors;
         }
 
@@ -150,6 +162,20 @@ namespace SourceGit.Native
 
             return string.Empty;
         }
+
+        private string FindSublimeText()
+        {
+            if (File.Exists("/Applications/Sublime Text.app/Contents/SharedSupport/bin"))
+            {
+                return "/Applications/Sublime Text.app/Contents/SharedSupport/bin";
+            }
+
+            var customPath = Environment.GetEnvironmentVariable("SUBLIME_TEXT_PATH");
+            if (!string.IsNullOrEmpty(customPath))
+                return customPath;
+
+            return string.Empty;
+        }
         #endregion
     }
 }