Currently there are two: references which should work faster and more reliablu and test discovery used by vscode extension to power Test UI. In the future I plan to incorporate this database in other providers to enable more consistent experience when working with not compiled source code.
lukaszsamson
ElixirLS Core Team
erszcz
Hi!
First things first - thanks for building ElixirLS!
I’m wondering what it would take to add another diagnostics provider to ElixirLS. We’ve built Gradient, a static type checker for Elixir. It’s based on Gradualizer, a similar tool for Erlang, which can be reused thanks to both languages targeting the same abstract syntax tree. Gradualizer is integrated with ErlangLS (the link points to a video, the integration is presented from 38:50 to 41:45) so it offers instant feedback in the editor of your choice.
ErlangLS comes with a plugin mechanism and a tutorial on adding diagnostics backends. I’m wondering if extensions such as new diagnostics are welcome. Is there an API similar to the one in ErlangLS? What would be the best way to add Gradient diagnostics to ElixirLS?
lukaszsamson
ElixirLS Core Team
It’s definitely possible, please open an issue. BTW last time I checked (~2 years ago) gradualizer was completely unusable on elixir projects. I think the issues I raised are still open
erszcz
Awesome, I’ll open an issue.
last time I checked (~2 years ago) gradualizer was completely unusable on elixir projects
Two years is a long time 
Anyway, Gradualizer itself is targeted for use with Erlang. That’s the rationale for Gradient, which is targeted for use with Elixir.
I think the issues I raised are still open.
I see only one of all four of them still being open. I think this last one is actually also solved, but let’s continue in the ticket itself.
lukaszsamson
ElixirLS Core Team
Version 0.13.0 has been released 
This release further improves experience with reloading dependencies on branch switching. It also fixes major problems introduced in v0.12.0. Completions auto aliasing experience should now be much improved. The performance issues during build should now fixed as well. Unfortunately we had to remove a code action prefixing unused variables with _ as it broke code in many cases.
I’m also happy to announce that Steve Cohen nas joined the team. He is focusing on optimisation and refactoring of elixirLS codebase.
See full release notes
ElixirLS elixir-ls/CHANGELOG.md at v0.13.0 · elixir-lsp/elixir-ls · GitHub
vscode extension vscode-elixir-ls/CHANGELOG.md at v0.13.0 · elixir-lsp/vscode-elixir-ls · GitHub
21
lukaszsamson
ElixirLS Core Team
Version 0.14.0 has been released
This release brings significant improvements to variable and alias tracking, which should enhance the quality of completions, references, definitions, and signature providers. We have also improved compatibility with Mix, and the debugger now supports setting MIX_TARGET.
The highlight of this release is the ability to run the debugger on tests directly from the Test UI. Additionally, we have changed the distribution mechanism for the VSCode extension to use Mix.install, which should resolve many subtle issues and ensure that elixir-ls is built for the version of Elixir and OTP used in your project. In the future we plan to make it a default distribution mechanism for ElixirLS
See full release notes
ElixirLS elixir-ls/CHANGELOG.md at v0.14.0 · elixir-lsp/elixir-ls · GitHub
vscode extension vscode-elixir-ls/CHANGELOG.md at v0.14.0 · elixir-lsp/vscode-elixir-ls · GitHub
21
mindreframer
Wow. Having elixir-ls built for the project-specific Elixir / OTP is HUGE. Spent lots of time trying to work around that issue. Looking forward for a test-drive! Thanks a lot!
aiwaiwa
Great job, @lukaszsamson!
A little hiccup here, fresh install on Windows, removed & reinstalled, deleted .elixir_ls, still the server doesn’t like the outcome:
[Error - 7:34:57 AM] Server initialization failed.
Message: Pending response rejected since connection got disposed
Code: -32097
[Info - 7:34:57 AM] Connection to server got closed. Server will restart.
true
[Error - 7:34:57 AM] ElixirLS - project_web_upload_demonstration client: couldn't create connection to server.
Message: Pending response rejected since connection got disposed
Code: -32097
[Error - 7:34:59 AM] Server initialization failed.
Message: Pending response rejected since connection got disposed
Code: -32097
[Info - 7:34:59 AM] Connection to server got closed. Server will restart.
true
[Error - 7:34:59 AM] ElixirLS - project_web_upload_demonstration client: couldn't create connection to server.
Message: Pending response rejected since connection got disposed
Code: -32097
[Error - 7:35:00 AM] Server initialization failed.
Message: Pending response rejected since connection got disposed
Code: -32097
[Info - 7:35:00 AM] Connection to server got closed. Server will restart.
true
[Error - 7:35:00 AM] ElixirLS - project_web_upload_demonstration client: couldn't create connection to server.
Message: Pending response rejected since connection got disposed
Code: -32097
[Error - 7:35:00 AM] Restarting server failed
Message: Pending response rejected since connection got disposed
Code: -32097
[Error - 7:35:02 AM] Server initialization failed.
Message: Pending response rejected since connection got disposed
Code: -32097
[Info - 7:35:02 AM] Connection to server got closed. Server will restart.
true
[Error - 7:35:02 AM] ElixirLS - project_web_upload_demonstration client: couldn't create connection to server.
Message: Pending response rejected since connection got disposed
Code: -32097
[Error - 7:35:02 AM] Restarting server failed
Message: Pending response rejected since connection got disposed
Code: -32097
[Error - 7:35:04 AM] Server initialization failed.
Message: Pending response rejected since connection got disposed
Code: -32097
[Error - 7:35:04 AM] The ElixirLS - project_web_upload_demonstration server crashed 5 times in the last 3 minutes. The server will not be restarted. See the output for more information.
[Error - 7:35:04 AM] ElixirLS - project_web_upload_demonstration client: couldn't create connection to server.
Message: Pending response rejected since connection got disposed
Code: -32097
[Error - 7:35:04 AM] Restarting server failed
Message: Pending response rejected since connection got disposed
Code: -32097
It’s a single-root project, nothing fancy.
Sorc96
I’m getting the same problem on Ubuntu 22. Also tried reinstalling the extension and deleting .elixir_ls.