Provide wasm extensions with APIs needed for using pre-installed LSP binaries (#9085)

In this PR, we've added two new methods that LSP extensions can call:
* `shell_env()`, for retrieving the environment variables set in the
user's default shell in the worktree
* `which(command)`, for looking up paths to an executable (accounting
for the user's shell env in the worktree)

To test this out, we moved the `uiua` language support into an
extension. We went ahead and removed the built-in support, since this
language is extremely obscure. Sorry @mikayla-maki. To continue coding
in Uiua in Zed, for now you can `Add Dev Extension` from the extensions
pane, and select the `extensions/uiua` directory in the Zed repo. Very
soon, we'll support publishing these extensions so that you'll be able
to just install it normally.

Release Notes:

- N/A

---------

Co-authored-by: Marshall <marshall@zed.dev>

crates/languages/Cargo.toml

@@ -76,7 +76,6 @@ tree-sitter-scheme.workspace = true
 tree-sitter-svelte.workspace = true
 tree-sitter-toml.workspace = true
 tree-sitter-typescript.workspace = true
-tree-sitter-uiua.workspace = true
 tree-sitter-vue.workspace = true
 tree-sitter-yaml.workspace = true
 tree-sitter-zig.workspace = true

crates/languages/src/go.rs

@@ -58,7 +58,8 @@ impl super::LspAdapter for GoLspAdapter {
         &self,
         delegate: &dyn LspAdapterDelegate,
     ) -> Option<LanguageServerBinary> {
-        let (path, env) = delegate.which_command(OsString::from("gopls")).await?;
+        let env = delegate.shell_env().await;
+        let path = delegate.which("gopls".as_ref()).await?;
         Some(LanguageServerBinary {
             path,
             arguments: server_binary_arguments(),

crates/languages/src/lib.rs

@@ -39,7 +39,6 @@ mod tailwind;
 mod terraform;
 mod toml;
 mod typescript;
-mod uiua;
 mod vue;
 mod yaml;
 mod zig;
@@ -114,7 +113,6 @@ pub fn init(
         ("toml", tree_sitter_toml::language()),
         ("tsx", tree_sitter_typescript::language_tsx()),
         ("typescript", tree_sitter_typescript::language_typescript()),
-        ("uiua", tree_sitter_uiua::language()),
         ("vue", tree_sitter_vue::language()),
         ("yaml", tree_sitter_yaml::language()),
         ("zig", tree_sitter_zig::language()),
@@ -344,7 +342,6 @@ pub fn init(
         "vue",
         vec![Arc::new(vue::VueLspAdapter::new(node_runtime.clone()))]
     );
-    language!("uiua", vec![Arc::new(uiua::UiuaLanguageServer {})]);
     language!("proto");
     language!("terraform", vec![Arc::new(terraform::TerraformLspAdapter)]);
     language!(

crates/languages/src/uiua/config.toml

@@ -1,11 +0,0 @@
-name = "Uiua"
-grammar = "uiua"
-path_suffixes = ["ua"]
-line_comments = ["# "]
-autoclose_before = ")]}\""
-brackets = [
-    { start = "{", end = "}", close = true, newline = false},
-    { start = "[", end = "]", close = true, newline = false },
-    { start = "(", end = ")", close = true, newline = false },
-    { start = "\"", end = "\"", close = true, newline = false, not_in = ["string"] },
-]

crates/languages/src/uiua/highlights.scm

@@ -1,50 +0,0 @@
-[
-  (openParen)
-  (closeParen)
-  (openCurly)
-  (closeCurly)
-  (openBracket)
-  (closeBracket)
-] @punctuation.bracket
-
-[
-  (branchSeparator)
-  (underscore)
-] @constructor
-; ] @punctuation.delimiter
-
-[ (character) ] @constant.character
-[ (comment) ] @comment
-[ (constant) ] @constant.numeric
-[ (identifier) ] @variable
-[ (leftArrow) ] @keyword
-[ (function) ] @function
-[ (modifier1) ] @operator
-[ (modifier2) ] @operator
-[ (number) ] @constant.numeric
-[ (placeHolder) ] @special
-[ (otherConstant) ] @string.special
-[ (signature) ] @type
-[ (system) ] @function.builtin
-[ (tripleMinus) ] @module
-
-; planet
-[
-  "id"
-  "identity"
-  "∘"
-  "dip"
-  "⊙"
-  "gap"
-  "⋅"
-] @tag
-
-[
-  (string)
-  (multiLineString)
-] @string
-
-; [
-;   (deprecated)
-;   (identifierDeprecated)
-; ] @warning

crates/languages/src/uiua/indents.scm

@@ -1,3 +0,0 @@
-[
-  (array)
-] @indent

crates/languages/src/zig.rs

@@ -7,7 +7,6 @@ use language::{LanguageServerName, LspAdapter, LspAdapterDelegate};
 use lsp::LanguageServerBinary;
 use smol::fs;
 use std::env::consts::{ARCH, OS};
-use std::ffi::OsString;
 use std::{any::Any, path::PathBuf};
 use util::async_maybe;
 use util::github::latest_github_release;
@@ -45,7 +44,8 @@ impl LspAdapter for ZlsAdapter {
         &self,
         delegate: &dyn LspAdapterDelegate,
     ) -> Option<LanguageServerBinary> {
-        let (path, env) = delegate.which_command(OsString::from("zls")).await?;
+        let env = delegate.shell_env().await;
+        let path = delegate.which("zls".as_ref()).await?;
         Some(LanguageServerBinary {
             path,
             arguments: vec![],