Create a coq formatter

[ogiekako]

Reproduction:

1. Open foo.v, which is not formatted, e.g.

Inductive day : Type :=
  | monday
    | tuesday
  | wednesday
    | thursday
  | friday
  | saturday
  | sunday.

2. Press F1 && Format Document.

Got:

• The source code isn't formatted.
• VS Code show the message "There is no formater for 'coq' files installed".
• I press the button "Install Formatter..." on the message, but no candidates are listed.

Expected:
The source code is formatted.

[Zimmi48]

But there is no formatter for Coq source code, so I don't see why you would expect a different behavior. Furthermore, this is not really related to VsCoq, is it? The "Format Document" command is provided by default by VsCode.

[gares]

The I guess this bug can be turned into a feature request...

[artagnon]

Once rocq-archive/coq-serapi#191 is fixed, it'll be trivial to write a vscode extension that calls the formatter.

[Zimmi48]

There are good chances though that the beautifier will not be a satisfying formatter (at least not before many fixes). It has hardly been maintained at all.