helper for starting up editor

bin/dev

@@ -50,6 +50,20 @@ class DevHelper:
         preset, fresh = self._parse_preset_args(args, "build")
         self._build_preset(preset, fresh)
 
+    ##
+    # Builds the debug preset (incrementally), then runs the editor from
+    # build/debug. Any arguments are passed through to the editor.
+    #   dev editor [args...]
+    def editor(self, *args, **kwargs):
+        preset = self.DEFAULT_PRESET
+        self._build_preset(preset, fresh=False)
+
+        preset_dir = os.path.join(self._project_root(), "build", preset)
+        binary = os.path.join(preset_dir, "bin", "editor")
+        print(f"Running: {shlex.join([binary, *args])}")
+        os.chdir(preset_dir)
+        os.execv(binary, [binary, *args])
+
     ##
     # Builds the debug preset (incrementally), then runs the testbed from
     # build/debug. Any arguments are passed through to the testbed.