feat(utils): skip ngcc processing in ng16 or higher (#2063)

src/utils/ngcc-jest-processor.ts

@@ -11,13 +11,29 @@ let ngccPath = '';
 try {
   ngccPath = require.resolve('@angular/compiler-cli/ngcc/main-ngcc.js');
 } catch {
-  const compilerCliNgccPath = require.resolve('@angular/compiler-cli/ngcc');
-  ngccPath = path.resolve(compilerCliNgccPath.substring(0, compilerCliNgccPath.lastIndexOf(path.sep)), 'main-ngcc.js');
+  try {
+    const compilerCliNgccPath = require.resolve('@angular/compiler-cli/ngcc');
+    const compilerCliNgccFolder = compilerCliNgccPath.substring(0, compilerCliNgccPath.lastIndexOf(path.sep));
+    ngccPath = path.resolve(compilerCliNgccFolder, 'main-ngcc.js');
+  } catch {
+    // No ngcc in NG16
+  }
 }
 function findNodeModulesDirectory(): string {
   return ngccPath.substring(0, ngccPath.indexOf(ANGULAR_COMPILER_CLI_PKG_NAME));
 }
 
+function findAngularCompilerCliVersion(): string {
+  const path = require.resolve(ANGULAR_COMPILER_CLI_PKG_NAME);
+  const substringLength = path.indexOf(ANGULAR_COMPILER_CLI_PKG_NAME) + ANGULAR_COMPILER_CLI_PKG_NAME.length;
+  const ngCompilerCliFolder = path.substring(0, substringLength);
+  const ngCompilerCliPackageJson = `${ngCompilerCliFolder}/package.json`;
+  // eslint-disable-next-line @typescript-eslint/no-var-requires
+  const { version } = require(ngCompilerCliPackageJson);
+
+  return version;
+}
+
 const nodeModuleDirPath = findNodeModulesDirectory();
 
 export const runNgccJestProcessor = (tsconfigPath: string | undefined): void => {
@@ -55,10 +71,18 @@ export const runNgccJestProcessor = (tsconfigPath: string | undefined): void =>
       throw new Error(`${errorMessage} NGCC failed ${errorMessage ? ', see above' : ''}.`);
     }
   } else {
-    console.log(
-      `Warning: Could not locate '@angular/compiler-cli' to run 'ngcc' automatically.` +
-        `Please make sure you are running 'ngcc-jest-processor.js' from root level of your project.` +
-        `'ngcc' must be run before running Jest`,
-    );
+    const ngCompilerCliVersion = findAngularCompilerCliVersion();
+    const [ngMajorVersion] = ngCompilerCliVersion.split('.');
+
+    if (parseInt(ngMajorVersion, 10) < 16) {
+      console.log(
+        `Warning: Could not locate '@angular/compiler-cli' to run 'ngcc' automatically.` +
+          `Please make sure you are running 'ngcc-jest-processor.js' from root level of your project.` +
+          `'ngcc' must be run before running Jest`,
+      );
+    } else {
+      console.log(`@angular/compiler-cli@${ngCompilerCliVersion} detected. Skipping 'ngcc'`);
+      console.log(`Tip: To avoid this message you can remove 'jest-preset-angular/global-setup' from your jest config`);
+    }
   }
 };