feat: deno lsp (#3210)

Co-authored-by: hiunguynx <[email protected]>
Co-authored-by: opencode-agent[bot] <opencode-agent[bot]@users.noreply.github.com>

2 files changed, 50 insertions, 18 deletions

diff --git a/packages/opencode/src/lsp/server.ts b/packages/opencode/src/lsp/server.ts
index 17211da11..68d8c2a93 100644
--- a/packages/opencode/src/lsp/server.ts
+++ b/packages/opencode/src/lsp/server.ts
@@ -20,10 +20,20 @@ export namespace LSPServer {
 
   type RootFunction = (file: string) => Promise<string | undefined>
 
-  const NearestRoot = (patterns: string[]): RootFunction => {
+  const NearestRoot = (includePatterns: string[], excludePatterns?: string[]): RootFunction => {
     return async (file) => {
+      if (excludePatterns) {
+        const excludedFiles = Filesystem.up({
+          targets: excludePatterns,
+          start: path.dirname(file),
+          stop: Instance.directory,
+        })
+        const excluded = await excludedFiles.next()
+        await excludedFiles.return()
+        if (excluded.value) return undefined
+      }
       const files = Filesystem.up({
-        targets: patterns,
+        targets: includePatterns,
         start: path.dirname(file),
         stop: Instance.directory,
       })
@@ -42,9 +52,30 @@ export namespace LSPServer {
     spawn(root: string): Promise<Handle | undefined>
   }
 
+  export const Deno: Info = {
+    id: "deno",
+    root: NearestRoot(["deno.json", "deno.jsonc"]),
+    extensions: [".ts", ".tsx", ".js", ".jsx", ".mjs"],
+    async spawn(root) {
+      const deno = Bun.which("deno")
+      if (!deno) {
+        log.info("deno not found, please install deno first")
+        return
+      }
+      return {
+        process: spawn(deno, ["lsp"], {
+          cwd: root,
+        }),
+      }
+    },
+  }
+
   export const Typescript: Info = {
     id: "typescript",
-    root: NearestRoot(["package-lock.json", "bun.lockb", "bun.lock", "pnpm-lock.yaml", "yarn.lock"]),
+    root: NearestRoot(
+      ["package-lock.json", "bun.lockb", "bun.lock", "pnpm-lock.yaml", "yarn.lock"],
+      ["deno.json", "deno.jsonc"],
+    ),
     extensions: [".ts", ".tsx", ".js", ".jsx", ".mjs", ".cjs", ".mts", ".cts"],
     async spawn(root) {
       const tsserver = await Bun.resolve("typescript/lib/tsserver.js", Instance.directory).catch(() => {})
diff --git a/packages/web/src/content/docs/lsp.mdx b/packages/web/src/content/docs/lsp.mdx
index 247f1bd54..e81fa9cf9 100644
--- a/packages/web/src/content/docs/lsp.mdx
+++ b/packages/web/src/content/docs/lsp.mdx
@@ -11,21 +11,22 @@ OpenCode integrates with your Language Server Protocol (LSP) to help the LLM int
 
 OpenCode comes with several built-in LSP servers for popular languages:
 
-| LSP Server | Extensions                                           | Requirements                        |
-| ---------- | ---------------------------------------------------- | ----------------------------------- |
-| typescript | .ts, .tsx, .js, .jsx, .mjs, .cjs, .mts, .cts         | `typescript` dependency in project  |
-| eslint     | .ts, .tsx, .js, .jsx, .mjs, .cjs, .mts, .cts, .vue   | `eslint` dependency in project      |
-| gopls      | .go                                                  | `go` command available              |
-| ruby-lsp   | .rb, .rake, .gemspec, .ru                            | `ruby` and `gem` commands available |
-| pyright    | .py, .pyi                                            | `pyright` dependency installed      |
-| elixir-ls  | .ex, .exs                                            | `elixir` command available          |
-| zls        | .zig, .zon                                           | `zig` command available             |
-| csharp     | .cs                                                  | `.NET SDK` installed                |
-| vue        | .vue                                                 | Auto-installs for Vue projects      |
-| rust       | .rs                                                  | `rust-analyzer` command available   |
-| clangd     | .c, .cpp, .cc, .cxx, .c++, .h, .hpp, .hh, .hxx, .h++ | Auto-installs for C/C++ projects    |
-| svelte     | .svelte                                              | Auto-installs for Svelte projects   |
-| jdtls      | .java                                                | `Java SDK (version 21+)` installed  |
+| LSP Server | Extensions                                           | Requirements                                                 |
+| ---------- | ---------------------------------------------------- | ------------------------------------------------------------ |
+| typescript | .ts, .tsx, .js, .jsx, .mjs, .cjs, .mts, .cts         | `typescript` dependency in project                           |
+| deno       | .ts, .tsx, .js, .jsx, .mjs                           | `deno` command available (auto-detects deno.json/deno.jsonc) |
+| eslint     | .ts, .tsx, .js, .jsx, .mjs, .cjs, .mts, .cts, .vue   | `eslint` dependency in project                               |
+| gopls      | .go                                                  | `go` command available                                       |
+| ruby-lsp   | .rb, .rake, .gemspec, .ru                            | `ruby` and `gem` commands available                          |
+| pyright    | .py, .pyi                                            | `pyright` dependency installed                               |
+| elixir-ls  | .ex, .exs                                            | `elixir` command available                                   |
+| zls        | .zig, .zon                                           | `zig` command available                                      |
+| csharp     | .cs                                                  | `.NET SDK` installed                                         |
+| vue        | .vue                                                 | Auto-installs for Vue projects                               |
+| rust       | .rs                                                  | `rust-analyzer` command available                            |
+| clangd     | .c, .cpp, .cc, .cxx, .c++, .h, .hpp, .hh, .hxx, .h++ | Auto-installs for C/C++ projects                             |
+| svelte     | .svelte                                              | Auto-installs for Svelte projects                            |
+| jdtls      | .java                                                | `Java SDK (version 21+)` installed                           |
 
 LSP servers are automatically enabled when one of the above file extensions are detected and the requirements are met.