[helix] Use Zuban for goto-definition and similar

It supports pytest fixtures!

https://github.com/zubanls/zuban

Author: rouge8

.config/helix.symlink/languages.toml

@@ -8,6 +8,10 @@ command = "efm-langserver"
 command = "pyright-langserver"
 args = ["--stdio"]
 
+[language-server.zuban]
+command = "zuban"
+args = ["server"]
+
 [language-server.vuels.config]
 
 [[language-server.typescript-language-server.config.plugins]]
@@ -28,7 +32,17 @@ args = ["serve"]
 name = "python"
 auto-format = true
 language-servers = [
-  { name = "ty", except-features = ["format"] },
+  { name = "ty", except-features = [
+    "format",
+    "goto-definition",
+    "goto-declaration",
+    "goto-type-definition"
+  ] },
+  { name = "zuban", only-features = [
+    "goto-definition",
+    "goto-declaration",
+    "goto-type-definition",
+  ] },
   { name = "efm", only-features = ["diagnostics", "format"] },
   "typos",
 ]

Brewfile

@@ -125,6 +125,8 @@ brew "yamllint"
 brew "yq"
 # In terminal graphical metrics for your *nix system
 brew "zenith"
+# Python language server and type checker, written in Rust
+brew "zuban"
 # Web browser
 cask "firefox"
 # Screen colour temperature controller