add support for Kotlin language (#52)

Cargo.lock

@@ -997,6 +997,7 @@ dependencies = [
  "tree-sitter-java",
  "tree-sitter-javascript",
  "tree-sitter-json",
+ "tree-sitter-kotlin",
  "tree-sitter-lua",
  "tree-sitter-md",
  "tree-sitter-objc",
@@ -2424,6 +2425,16 @@ dependencies = [
  "tree-sitter",
 ]
 
+[[package]]
+name = "tree-sitter-kotlin"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b5f367466210220a194a2d8831fc12d15aa13305e7bcdf2dba47714aa328e86"
+dependencies = [
+ "cc",
+ "tree-sitter",
+]
+
 [[package]]
 name = "tree-sitter-lua"
 version = "0.0.19"

crates/llm-ls/Cargo.toml

@@ -39,6 +39,7 @@ tree-sitter-html = "0.19"
 tree-sitter-java = "0.20"
 tree-sitter-javascript = "0.20"
 tree-sitter-json = "0.20"
+tree-sitter-kotlin = "0.3.1"
 tree-sitter-lua = "0.0.19"
 tree-sitter-md = "0.1"
 tree-sitter-objc = "3"

crates/llm-ls/src/document.rs

@@ -85,6 +85,13 @@ fn get_parser(language_id: LanguageId) -> Result<Parser> {
                 .map_err(internal_error)?;
             Ok(parser)
         }
+        LanguageId::Kotlin => {
+            let mut parser = Parser::new();
+            parser
+                .set_language(tree_sitter_kotlin::language())
+                .map_err(internal_error)?;
+            Ok(parser)
+        }
         LanguageId::Lua => {
             let mut parser = Parser::new();
             parser

crates/llm-ls/src/language_id.rs

@@ -15,6 +15,7 @@ pub(crate) enum LanguageId {
     JavaScript,
     JavaScriptReact,
     Json,
+    Kotlin,
     Lua,
     Markdown,
     ObjectiveC,
@@ -44,6 +45,7 @@ impl fmt::Display for LanguageId {
             Self::JavaScript => write!(f, "javascript"),
             Self::JavaScriptReact => write!(f, "javascriptreact"),
             Self::Json => write!(f, "json"),
+            Self::Kotlin => write!(f, "kotlin"),
             Self::Lua => write!(f, "lua"),
             Self::Markdown => write!(f, "markdown"),
             Self::ObjectiveC => write!(f, "objective-c"),
@@ -84,6 +86,7 @@ impl From<&str> for LanguageId {
             "javascript" => Self::JavaScript,
             "javascriptreact" => Self::JavaScriptReact,
             "json" => Self::Json,
+            "kotlin" => Self::Kotlin,
             "lua" => Self::Lua,
             "markdown" => Self::Markdown,
             "objective-c" => Self::ObjectiveC,