Set workspaceFolder in debug config before substituting command varia…

…bles (microsoft#21835)

For microsoft#18482

src/client/debugger/extension/configuration/resolvers/launch.ts

@@ -55,6 +55,10 @@ export class LaunchConfigurationResolver extends BaseConfigurationResolver<Launc
  }
 
  const workspaceFolder = LaunchConfigurationResolver.getWorkspaceFolder(folder);
+ // Pass workspace folder so we can get this when we get debug events firing.
+ // Do it here itself instead of `resolveDebugConfigurationWithSubstitutedVariables` which is called after
+ // this method, as in order to calculate substituted variables, this might be needed.
+ debugConfiguration.workspaceFolder = workspaceFolder?.fsPath;
  await this.resolveAndUpdatePaths(workspaceFolder, debugConfiguration);
  if (debugConfiguration.clientOS === undefined) {
  debugConfiguration.clientOS = getOSType() === OSType.Windows ? 'windows' : 'unix';
@@ -135,8 +139,6 @@ export class LaunchConfigurationResolver extends BaseConfigurationResolver<Launc
  // Populate justMyCode using debugStdLib
  debugConfiguration.justMyCode = !debugConfiguration.debugStdLib;
  }
- // Pass workspace folder so we can get this when we get debug events firing.
- debugConfiguration.workspaceFolder = workspaceFolder ? workspaceFolder.fsPath : undefined;
  const debugOptions = debugConfiguration.debugOptions!;
  if (!debugConfiguration.justMyCode) {
  LaunchConfigurationResolver.debugOption(debugOptions, DebugOptions.DebugStdLib);