Adds the ability to open with VSCode to the right-click menu to Godot's file system dock.

OpenInVSCode.cs

#if TOOLS
using System.IO;
using System.Linq;
using Godot;

using static Godot.GD;

namespace CretaPark.GodotTools;

[Tool]
public partial class OpenInVSCode : EditorPlugin {
    
    private const int POPUP_MENU_ID = 5164;
    private const string NODE_PATH_CONTEXT_MENU = "@PopupMenu@5811";    //use @5651 after 4.3-beta.1, there's breaking changes.
    
    private PopupMenu _fileSystemDockContextMenu;
    
    public override void _EnterTree() {
        
        var fileSystemDock = EditorInterface.Singleton.GetFileSystemDock();
        
        if (!IsInstanceValid(_fileSystemDockContextMenu)) {
            
            _fileSystemDockContextMenu = fileSystemDock.GetNode(NODE_PATH_CONTEXT_MENU) as PopupMenu;
            
            if (!IsInstanceValid(_fileSystemDockContextMenu))
                return;
        }
        
        _fileSystemDockContextMenu.AboutToPopup += PopupMenu_AboutToPopup;
        _fileSystemDockContextMenu.IdPressed    += PopupMenu_IdPressed;
    }
    
    public override void _ExitTree() {
        
        if (IsInstanceValid(_fileSystemDockContextMenu)) {
            
            _fileSystemDockContextMenu.AboutToPopup -= PopupMenu_AboutToPopup;
            _fileSystemDockContextMenu.IdPressed    -= PopupMenu_IdPressed;
        }
        
        _fileSystemDockContextMenu = null;
    }
    
    private void PopupMenu_AboutToPopup() {
        
        int registeredItemIndex = _fileSystemDockContextMenu.GetItemIndex(POPUP_MENU_ID);
        
        if (registeredItemIndex != -1)
            _fileSystemDockContextMenu.RemoveItem(registeredItemIndex);
        
        Theme     editorTheme  = EditorInterface.Singleton.GetEditorTheme();
        Texture2D codeEditIcon = editorTheme.GetIcon("CodeEdit", "EditorIcons");
        
        _fileSystemDockContextMenu.AddIconItem(codeEditIcon, "Open in VSCode", POPUP_MENU_ID);
    }
    
    private void PopupMenu_IdPressed(long id) {
        
        if (id != POPUP_MENU_ID)
            return;
        
        string externalCodePath = EditorInterface.Singleton
            .GetEditorSettings()
            .GetSetting("text_editor/external/exec_path")
            .AsString();
        
        if (!Path.GetDirectoryName(externalCodePath).EndsWith("Microsoft VS Code")) {
            
            Print(
                $"[{nameof(OpenInVSCode)}] Please ensure setting \"text_editor/external/exec_path\""
               + " is set to the path of VSCode in Editor settings."
            );
            
            return;
        }
        
        var selectedPaths = EditorInterface.Singleton.GetSelectedPaths()
            .Select(ProjectSettings.GlobalizePath);
        
        OS.Execute(externalCodePath, [ "-r", ..selectedPaths ]);
    }
}
#endif

plugin.cfg

[plugin]

name="OpenInVSCode"
description="Adds the ability to open with VSCode to the right-click menu to Godot's file system dock."
author="Creta Park"
version="1.0.0"
language="C-sharp"
script="OpenInVSCode.cs"

Heya, awesome plugin! Do you mind if I upload my GDScript adaptation to the Godot asset store? I have your name included as well in the authors and I can link back to this Gist if you like @Creta5164