src: improve start-up and session fail messages for remote dlv-dap

src/goDebugConfiguration.ts

@@ -175,7 +175,7 @@ export class GoDebugConfigurationProvider implements vscode.DebugConfigurationPr
  // but we have no way of detectng that with an external server.
  this.showWarning(
  'ignoreDlvDAPInRemoteModeWarning',
- "'remote' mode with 'dlv-dap' debugAdapter must connect to an external `dlv --headless` server @ v1.7.3 or later. Older versions will fail with \"error layer=rpc rpc:invalid character 'C' looking for beginning of value\" logged to the terminal.\n"
+ "Using new 'remote' mode with 'dlv-dap' to connect to an external `dlv --headless` server via DAP."
  );
  } else if (debugConfiguration['port']) {
  this.showWarning(

src/goDebugFactory.ts

@@ -17,6 +17,7 @@ import { Logger, TimestampedLogger } from './goLogging';
 import { DebugProtocol } from 'vscode-debugprotocol';
 import { getWorkspaceFolderPath } from './util';
 import { toolExecutionEnvironment } from './goEnv';
+import { ShowMessageNotification } from 'vscode-languageserver-protocol';
 
 export class GoDebugAdapterDescriptorFactory implements vscode.DebugAdapterDescriptorFactory {
  constructor(private outputChannel?: vscode.OutputChannel) {}
@@ -80,9 +81,10 @@ export class GoDebugAdapterTrackerFactory implements vscode.DebugAdapterTrackerF
  requestsSent > 0 &&
  responsesReceived === 0 // happens when the rpc server doesn't understand DAP
  ) {
- logger.warn(
- "'remote' mode with 'dlv-dap' debugAdapter must connect to an external headless server started with dlv @ v1.7.3 or later.\n"
- );
+ const err =
+ 'Expected to connect to external `dlv --headless` server @ v1.7.3 or later via DAP. Older versions fail with "error layer=rpc rpc:invalid character \'C\' looking for beginning of value" logged to the terminal.\n';
+ logger.warn(err);
+ vscode.window.showErrorMessage(err);
  }
  logger.debug(`session ${session.id} will stop\n`);
  },