[ruby-core:110679] [Ruby master Feature#19011] Improve LSP support in CRuby development itself

["kjtsanaktsidis (KJ Tsanaktsidis)" <noreply@ruby-lang.org>]

Issue #19011 has been updated by kjtsanaktsidis (KJ Tsanaktsidis).


I've been using Bear https://github.com/rizsotto/Bear for this - running `bear -- make` generates a _passable_ compile_commands.json file that sort-of works. It doesn't handle some of the trickier things though, e.g. files like vm_insnhelper.c which are not themselves compiled as a translation unit, but rather `#include`'d in vm.c. So having some better built-in support for this in the cruby development toolchain would be ace.

----------------------------------------
Feature #19011: Improve LSP support in CRuby development itself
https://bugs.ruby-lang.org/issues/19011#change-100022

* Author: tenderlovemaking (Aaron Patterson)
* Status: Open
* Priority: Normal
----------------------------------------
I would like to add a new configure option for improve working with language servers inside CRuby itself.

The summary is like this:

```
$ ./autogen.sh
$ ./configure --enable-compile-commands
$ make -j compile_commands.json
# Now use LSP
```

`clangd` uses `compile_commands.json` to understand how to compile files inside CRuby.  We can use `clang` itself to generate this file, but we have to pass special compile options to clang.  Unfortunately the compile options generate many small JSON files, so we also need a way to concatenate them in to `compile_commands.json`.

Ideally I would like `make miniruby` to build `miniruby` *and* `compile_commands.json`, but I don't know how to do that yet. 😅

I've send a patch [here](https://github.com/ruby/ruby/pull/6352)



-- 
https://bugs.ruby-lang.org/