refactor(language-service): Allow language service diagnostics to be …

…ignored

Add a check to the language service that ignores specified diagnostic codes.

This can be patched in g3 as needed, to ignore codes that are not relevant for g3 (or otherwise not compatible).

packages/language-service/src/language_service.ts

@@ -51,6 +51,11 @@ import {ActiveRefactoring, allRefactorings} from './refactorings/refactoring';
 
 type LanguageServiceConfig = Omit<PluginConfig, 'angularOnly'>;
 
+const ignoredAngularDiagnostics: number[] = [
+  // A list of diagnostic codes that are suppressed.
+  // This is especially useful for diagnostics that should be disabled in g3.
+];
+
 export class LanguageService {
   private options: CompilerOptions;
   readonly compilerFactory: CompilerFactory;
@@ -88,7 +93,10 @@ export class LanguageService {
         const program = compiler.getCurrentProgram();
         const sourceFile = program.getSourceFile(fileName);
         if (sourceFile) {
-          const ngDiagnostics = compiler.getDiagnosticsForFile(sourceFile, OptimizeFor.SingleFile);
+          let ngDiagnostics = compiler.getDiagnosticsForFile(sourceFile, OptimizeFor.SingleFile);
+          ngDiagnostics = ngDiagnostics.filter(
+            (diag) => !ignoredAngularDiagnostics.includes(diag.code),
+          );
           // There are several kinds of diagnostics returned by `NgCompiler` for a source file:
           //
           // 1. Angular-related non-template diagnostics from decorated classes within that