Cannot edit built-in script if external editor is enabled

[marcospb19]

Godot version:
3.1 and 3.2

OS/device including version:
Windows 10 and Manjaro Linux.

Issue description:
If external editor is enabled, the built-in script cannot be edited in any way.

Expected:
Godot opens the built-in script on the external editor or the embedded editor.

Steps to reproduce:

1. On a new project
2. Go to Editor -> Editor Settings -> Text Editor -> External.
3. Check the checkbox "Use External Editor".
4. Type "/usr/bin/subl" inside of "Exec Path".
5. Click on "close".
6. Attach a built-in script to a new Node.

[marcospb19]

Issue has been already reported on #29662, but I did not noticed this only happens with built-in scripts, so a commit fixed another issue there with Exec Flags stuff.

Then I reopened this issue with the fixed problem description.

[marcospb19]

We might need to discuss the expected behavior, as the built-in script is written inside of a scene file the easiest fixes are just open the file on the embedded editor and ignore the external editor option.

Or just open the scene file on the external editor (this could lead to many problems, if the scene is saved from any editor).

Also, a checkbox can choose one of those 2 options above.

[marcospb19]

A perfect integration with external editors and built-in scripts would be if Godot creates a temporary file representing the built-in script within the scene file, and pass this file to the external editor, so Godot may monitor this file and continuous maintain synchronization between editors.

I don't know if this is desirable or just too much (4.0?).

[qarlosh]

If "Use External Editor" is activated, when trying to edit a built-in script, this is opened using the Godot code editor, but it doesn't switch to the Script Workspace automatically. I think that fixing it should be enough.

[marcospb19]

@qarlosh to me it does not open in the Godot Code Editor.

Can you test it again and confirm this behavior?

[qarlosh]

@marcospb19 , I confirm the behavior in 3.2stable, using Linux Mint 64 bits. "Use External Editor" is activated and correctly configured with VS Code. If I try to open a built-in script, it opens in the Godot editor, but it doesn't switch to Script Workspace, I have to press F3 to see it.
Script files open correctly with VS Code.

[marcospb19]

Here it behaves differently.

Using 3.2.1 Stable on Arch Linux 64 bits, with "Use External Editor" enabled to open in nvim, sublime text (subl), or Visual Studio Code (code), with and without Exec Flags, the script DOES NOT open in the Godot Script editor, it's empty for me.

This difference information is important and should investigated when solving the issue.