Editable TextDocumentContentProvider

[xpe]

I would like to write an extension that allows editing of a (virtual) concatenation of files in a directory.

Here is an example of a virtual document I'd like to edit:

=====[ file_1.markdown ]=====
# File 1
This is the first file.
=====[ file_2.markdown ]=====
# File 2
This is the second file.
=====[ file_3.markdown ]=====
# File 3
This is the third file.

It seems to me that a TextDocumentContentProvider is almost what I want, but according to the documentation, it is read-only. Others have noticed this limitation and asked to make it read-write: see this GitHub thread that started in 2016:

• Editable TextDocumentContentProvider for extensions

[gjsjohnmurray]

I suggest you look at FileSystemProvider.