feat(@ngtools/webpack): add support for traceResolution

alan-agius4 · hansl · commit b65860fee2e8 · 2018-09-17T15:06:56.000-07:00
Closes angular#8676
diff --git a/packages/ngtools/webpack/src/compiler_host.ts b/packages/ngtools/webpack/src/compiler_host.ts
@@ -246,6 +246,10 @@ export class WebpackCompilerHost implements ts.CompilerHost {
       return this.readFile(fileName);
     }
   }
+
+  trace(message: string) {
+    console.log(message);
+  }
 }
 
 
diff --git a/tests/legacy-cli/e2e/tests/misc/trace-resolution.ts b/tests/legacy-cli/e2e/tests/misc/trace-resolution.ts
@@ -0,0 +1,22 @@
+import { ng } from '../../utils/process';
+import { updateJsonFile } from '../../utils/project';
+
+export default async function () {
+  await updateJsonFile('tsconfig.json', tsconfig => {
+    tsconfig.compilerOptions.traceResolution = true;
+  });
+
+  const { stdout: stdoutTraced } = await ng('build');
+  if (!/Resolving module/.test(stdoutTraced)) {
+    throw new Error(`Modules resolutions must be printed when 'traceResolution' is enabled.`);
+  }
+
+  await updateJsonFile('tsconfig.json', tsconfig => {
+    tsconfig.compilerOptions.traceResolution = false;
+  });
+
+  const { stdout: stdoutUnTraced } = await ng('build');
+  if (/Resolving module/.test(stdoutUnTraced)) {
+    throw new Error(`Modules resolutions must not be printed when 'traceResolution' is disabled.`);
+  }
+}

Original file line number	Diff line number	Diff line change
`@@ -246,6 +246,10 @@ export class WebpackCompilerHost implements ts.CompilerHost {`
`246`	`246`	`return this.readFile(fileName);`
`247`	`247`	`}`
`248`	`248`	`}`
	`249`	`+`
	`250`	`+ trace(message: string) {`
	`251`	`+ console.log(message);`
	`252`	`+ }`
`249`	`253`	`}`
`250`	`254`
`251`	`255`