Elixir language server not working

[achenet]

Hello,

I'm trying to do some work in Elixir. When I enter an Elixir codebase, if I try to use LSP features, they don't work.
For example, if I try to use goto-defintion, I'll get No configured language server supports goto-defintion.

However, I have elixir-ls installed and setup:

 hx --health elixir
Configured language servers:
  ✓ elixir-ls: /home/utilisateur/.local/bin/elixir-ls
Configured debug adapter: None
Configured formatter: None
Highlight queries: ✓
Textobject queries: ✓
Indent queries: ✓

the general health of my install:

 hx --health
Config file: /home/utilisateur/.config/helix/config.toml
Language file: /home/utilisateur/.config/helix/languages.toml
Log file: /home/utilisateur/.cache/helix/helix.log
Runtime directories: /home/utilisateur/.config/helix/runtime;/home/utilisateur/.cargo/bin/runtime
Clipboard provider: wl-paste+wl-copy
System clipboard provider: wl-paste+wl-copy

if we look in /home/utilisateur./.config/helix/languages.toml, we have:

[[language]]
name = "elixir"
scope = "source.elixir"
file-types = ["ex", "exs"]
auto-format = true
diagnostic-severity = "Hint"
comment-token = "#"
indent = {tab-width = 2, unit = " "}
injection-regex = "(elixir|ex)"
shebangs = ["elixir"]
roots = ["mix.exs", "mix.lock"]
language-servers = [ "elixir-ls" ]

I also have $HOME/helix/languages.toml, which contains the same block.
Testing with other languages, namely Go and Rust, shows that goto-defintion works with these languages.

I'm curious as to why it's not working on Elixir, and how I can get it working.

[archseer]

https://github.com/helix-editor/helix/wiki/Troubleshooting#lsp-isnt-working

[archseer]

There should be more to it in the log file, that line indicates the language server is terminating.

[achenet]

hey @archseer, thanks for your reply :)

I ran hx -v on an elixir project, here is the tail end of the logs file

2024-04-20T19:25:17.118 helix_lsp::client [INFO] Using custom LSP config: {"elixirLS":{"dialyzerEnabled":false}}
2024-04-20T19:25:17.118 helix_lsp::transport [INFO] elixir-ls -> {"jsonrpc":"2.0","method":"initialize","params":{"capabilities":{"general":{"positionEncodings":["utf-8","utf-32","utf-16"]},"textDocument":{"codeAction":{"codeActionLiteralSupport":{"codeActionKind":{"valueSet":["","quickfix","refactor","refactor.extract","refactor.inline","refactor.rewrite","source","source.organizeImports"]}},"dataSupport":true,"disabledSupport":true,"isPreferredSupport":true,"resolveSupport":{"properties":["edit","command"]}},"completion":{"completionItem":{"deprecatedSupport":true,"insertReplaceSupport":true,"resolveSupport":{"properties":["documentation","detail","additionalTextEdits"]},"snippetSupport":true,"tagSupport":{"valueSet":[1]}},"completionItemKind":{}},"hover":{"contentFormat":["markdown"]},"inlayHint":{"dynamicRegistration":false},"publishDiagnostics":{"tagSupport":{"valueSet":[1,2]},"versionSupport":true},"rename":{"dynamicRegistration":false,"honorsChangeAnnotations":false,"prepareSupport":true},"signatureHelp":{"signatureInformation":{"activeParameterSupport":true,"documentationFormat":["markdown"],"parameterInformation":{"labelOffsetSupport":true}}}},"window":{"workDoneProgress":true},"workspace":{"applyEdit":true,"configuration":true,"didChangeConfiguration":{"dynamicRegistration":false},"didChangeWatchedFiles":{"dynamicRegistration":true,"relativePatternSupport":false},"executeCommand":{"dynamicRegistration":false},"fileOperations":{"didRename":true,"willRename":true},"inlayHint":{"refreshSupport":false},"symbol":{"dynamicRegistration":false},"workspaceEdit":{"documentChanges":true,"failureHandling":"abort","normalizesLineEndings":false,"resourceOperations":["create","rename","delete"]},"workspaceFolders":true}},"clientInfo":{"name":"helix","version":"24.3 (97afd67f)"},"initializationOptions":{"elixirLS":{"dialyzerEnabled":false}},"processId":6123,"rootPath":"/home/utilisateur/chat","rootUri":"file:///home/utilisateur/chat","workspaceFolders":[{"name":"chat","uri":"file:///home/utilisateur/chat"}]},"id":0}
2024-04-20T19:25:17.959 helix_lsp::transport [INFO] elixir-ls <- {"jsonrpc":"2.0","method":"window/logMessage","params":{"message":"** (MatchError) no match of right hand side value: {:error, :already_present}\n    lib/language_server/cli.ex:20: ElixirLS.LanguageServer.CLI.main/0\n    nofile:1: (file)\n    (stdlib 5.2.1) erl_eval.erl:750: :erl_eval.do_apply/7\n    (elixir 1.16.2) lib/code.ex:572: Code.validated_eval_string/3","type":2}}
2024-04-20T19:25:17.960 helix_term::application [INFO] window/logMessage: LogMessageParams { typ: Warning, message: "** (MatchError) no match of right hand side value: {:error, :already_present}\n    lib/language_server/cli.ex:20: ElixirLS.LanguageServer.CLI.main/0\n    nofile:1: (file)\n    (stdlib 5.2.1) erl_eval.erl:750: :erl_eval.do_apply/7\n    (elixir 1.16.2) lib/code.ex:572: Code.validated_eval_string/3" }
2024-04-20T19:25:17.965 helix_lsp::transport [ERROR] elixir-ls err: <- StreamClosed
2024-04-20T19:25:17.966 helix_lsp [ERROR] failed to initialize language server: server closed the stream

[achenet]

and the logs just before that are:

2024-04-20T19:19:59.938 helix_term::application [WARN] Ignoring a client/registerCapability request because dynamic capability registration is not enabled. Please report this upstream to the language server
2024-04-20T19:20:04.443 helix_lsp::transport [ERROR] Tried sending response into a closed channel (id=Num(3)), original request likely timed out
2024-04-20T19:20:04.596 helix_lsp::transport [ERROR] Tried sending response into a closed channel (id=Num(4)), original request likely timed out
2024-04-20T19:20:41.600 helix_term::application [WARN] Ignoring a client/registerCapability request because dynamic capability registration is not enabled. Please report this upstream to the language server
2024-04-20T19:24:47.236 helix_core::syntax [ERROR] TS parser failed, disabling TS for the current buffer: Err(Cancelled)
2024-04-20T19:25:17.118 helix_lsp::client [INFO] Using custom LSP config: {"elixirLS":{"dialyzerEnabled":false}}

[the-mikedavis]

From the window/logMessage line it looks like ElixirLS has an internal error during startup:

2024-04-20T19:25:17.959 helix_lsp::transport [INFO] elixir-ls <- {"jsonrpc":"2.0","method":"window/logMessage","params":{"message":"** (MatchError) no match of right hand side value: {:error, :already_present}\n    lib/language_server/cli.ex:20: ElixirLS.LanguageServer.CLI.main/0\n    nofile:1: (file)\n    (stdlib 5.2.1) erl_eval.erl:750: :erl_eval.do_apply/7\n    (elixir 1.16.2) lib/code.ex:572: Code.validated_eval_string/3","type":2}}

[achenet]

ok, thanks, I'll try re-installing ElixirLS.
It's good to know that Helix is working fine, thanks for the help ^_^