Merge pull request #4 from x1unix/feat/support-wasm

feat: introduce connector for js/wasm

cmd/cmd.go

@@ -18,11 +18,11 @@ func GnoplsCmd() *cobra.Command {
  SilenceUsage: true,
  RunE: func(cmd *cobra.Command, args []string) error {
  slog.Info("Initializing Server...")
- env := &env.Env{
+ procEnv := &env.Env{
  GNOROOT: os.Getenv("GNOROOT"),
  GNOHOME: env.GnoHome(),
  }
- err := lsp.RunServer(cmd.Context(), env)
+ err := lsp.RunServer(cmd.Context(), procEnv)
  if err != nil {
  return err
  }

internal/env/conn_js.go

@@ -0,0 +1,12 @@
+package env
+
+import (
+ "context"
+ "net"
+
+ "github.com/gnolang/gnopls/internal/js"
+)
+
+func GetConnection(ctx context.Context) (net.Conn, error) {
+ return js.DialHost(ctx)
+}

internal/env/conn_other.go

@@ -0,0 +1,15 @@
+//go:build !js
+
+package env
+
+import (
+ "context"
+ "net"
+ "os"
+
+ "go.lsp.dev/pkg/fakenet"
+)
+
+func GetConnection(_ context.Context) (net.Conn, error) {
+ return fakenet.NewConn("stdio", os.Stdin, os.Stdout), nil
+}

internal/js/conn_js.go

@@ -0,0 +1,22 @@
+// Package js provides primitives to integrate language server with javascript environments such as browsers and Node.
+package js
+
+import (
+ "context"
+ "net"
+
+ "go.lsp.dev/pkg/fakenet"
+)
+
+// DialHost registers LSP message listener in JavaScript host and returns connection to use by LSP server.
+//
+// This function should be called only once before starting LSP server.
+func DialHost(ctx context.Context) (net.Conn, error) {
+ reader, err := registerRequestListener(ctx)
+ if err != nil {
+ return nil, err
+ }
+
+ conn := fakenet.NewConn("js", reader, messageWriter)
+ return conn, nil
+}

internal/js/example/.gitignore

@@ -0,0 +1,4 @@
+node_modules
+.DS_Store
+.vscode
+.idea

internal/js/example/README.md

@@ -0,0 +1,14 @@
+# Gnopls Embedding Example
+
+This directory contains a bare-minimum code to integrate Gnopls as a WebAssembly module
+into browser or Node.js environment.
+
+This example omits such nuances as editor integration or file system support and focuses just on basics.
+
+## Prerequisites
+
+* Copy `wasm_exec.js` file using following command:
+ * `cp $(go env GOROOT)/misc/wasm/wasm_exec.js .`
+* Build gnopls as a WebAssembly file for JavaScript environment:
+ * `GOOS=js GOARCH=wasm make build`
+* Modify paths to `wasm_exec.js` and WASM file in [worker.ts](./worker.ts) file.

internal/js/example/package.json

@@ -0,0 +1,18 @@
+{
+ "name": "example",
+ "version": "1.0.0",
+ "description": "",
+ "main": "index.js",
+ "scripts": {
+ "test": "echo \"Error: no test specified\" && exit 1"
+ },
+ "author": "",
+ "license": "ISC",
+ "dependencies": {
+ "@types/golang-wasm-exec": "^1.15.2",
+ "comlink": "^4.4.1",
+ "monaco-languageclient": "^8.7.0",
+ "vscode-languageclient": "^9.0.1",
+ "vscode-languageserver-protocol": "^3.17.5"
+ }
+}