Move lsp server to this repo (#5619)

rust/kcl-language-server/client/src/client.ts

@@ -0,0 +1,74 @@
+/* eslint suggest-no-throw/suggest-no-throw: 0 */
+import * as lc from 'vscode-languageclient/node'
+import type * as vscode from 'vscode'
+
+export async function createClient(
+  traceOutputChannel: vscode.OutputChannel,
+  outputChannel: vscode.OutputChannel,
+  initializationOptions: vscode.WorkspaceConfiguration,
+  serverOptions: lc.ServerOptions
+): Promise<lc.LanguageClient> {
+  const clientOptions: lc.LanguageClientOptions = {
+    documentSelector: [{ scheme: 'file', language: 'kcl' }],
+    initializationOptions,
+    traceOutputChannel,
+    outputChannel,
+    middleware: {
+      workspace: {
+        // HACK: This is a workaround, when the client has been disposed, VSCode
+        // continues to emit events to the client and the default one for this event
+        // attempt to restart the client for no reason
+        async didChangeWatchedFile(event: any, next: any) {
+          if (client.isRunning()) {
+            await next(event)
+          }
+        },
+        async configuration(
+          params: lc.ConfigurationParams,
+          token: vscode.CancellationToken,
+          next: lc.ConfigurationRequest.HandlerSignature
+        ) {
+          const resp = await next(params, token)
+          return resp
+        },
+      },
+    },
+  }
+
+  const client = new lc.LanguageClient(
+    'kcl-language-server',
+    'KittyCAD Language Server',
+    serverOptions,
+    clientOptions
+  )
+
+  client.registerFeature(new ExperimentalFeatures())
+
+  return client
+}
+
+class ExperimentalFeatures implements lc.StaticFeature {
+  getState(): lc.FeatureState {
+    return { kind: 'static' }
+  }
+  fillClientCapabilities(capabilities: lc.ClientCapabilities): void {
+    capabilities.experimental = {
+      snippetTextEdit: true,
+      codeActionGroup: true,
+      hoverActions: true,
+      serverStatusNotification: true,
+      colorDiagnosticOutput: true,
+      openServerLogs: true,
+      commands: {
+        commands: ['editor.action.triggerParameterHints'],
+      },
+      ...capabilities.experimental,
+    }
+  }
+  initialize(
+    _capabilities: lc.ServerCapabilities,
+    _documentSelector: lc.DocumentSelector | undefined
+  ): void {}
+  dispose(): void {}
+  clear(): void {}
+}