fix(compiler): emit preamble in generated files.

angular · Sep 7, 2017 · b1055a5 · b1055a5
1 parent 5ef6e63
commit b1055a5
Show file tree

Hide file tree

Showing 2 changed files with 18 additions and 9 deletions.
diff --git a/packages/compiler-cli/src/transformers/node_emitter.ts b/packages/compiler-cli/src/transformers/node_emitter.ts
@@ -24,19 +24,21 @@ export class TypeScriptNodeEmitter {
     // stmts.
     const statements: any[] = [].concat(
         ...stmts.map(stmt => stmt.visitStatement(converter, null)).filter(stmt => stmt != null));
-    const newSourceFile = ts.updateSourceFileNode(
-        sourceFile, [...converter.getReexports(), ...converter.getImports(), ...statements]);
+    const preambleStmts: ts.Statement[] = [];
     if (preamble) {
       if (preamble.startsWith('/*') && preamble.endsWith('*/')) {
         preamble = preamble.substr(2, preamble.length - 4);
       }
-      if (!statements.length) {
-        statements.push(ts.createEmptyStatement());
-      }
-      statements[0] = ts.setSyntheticLeadingComments(
-          statements[0],
+      const commentStmt = ts.createNotEmittedStatement(sourceFile);
+      ts.setSyntheticLeadingComments(
+          commentStmt,
           [{kind: ts.SyntaxKind.MultiLineCommentTrivia, text: preamble, pos: -1, end: -1}]);
+      ts.setEmitFlags(commentStmt, ts.EmitFlags.CustomPrologue);
+      preambleStmts.push(commentStmt);
     }
+    const newSourceFile = ts.updateSourceFileNode(
+        sourceFile,
+        [...preambleStmts, ...converter.getReexports(), ...converter.getImports(), ...statements]);
     return [newSourceFile, converter.getNodeMap()];
   }
 }

diff --git a/packages/compiler-cli/src/transformers/node_emitter_transform.ts b/packages/compiler-cli/src/transformers/node_emitter_transform.ts
@@ -11,6 +11,13 @@ import * as ts from 'typescript';
 
 import {TypeScriptNodeEmitter} from './node_emitter';
 
+const PREAMBLE = `/**
+* @fileoverview This file is generated by the Angular template compiler.
+* Do not edit.
+* @suppress {suspiciousCode,uselessCode,missingProperties,missingOverride}
+* tslint:disable
+*/`;
+
 export function getAngularEmitterTransformFactory(generatedFiles: GeneratedFile[]): () =>
     (sourceFile: ts.SourceFile) => ts.SourceFile {
   return function() {
@@ -20,10 +27,10 @@ export function getAngularEmitterTransformFactory(generatedFiles: GeneratedFile[
     return function(sourceFile: ts.SourceFile): ts.SourceFile {
       const g = map.get(sourceFile.fileName);
       if (g && g.stmts) {
-        const [newSourceFile] = emitter.updateSourceFile(sourceFile, g.stmts);
+        const [newSourceFile] = emitter.updateSourceFile(sourceFile, g.stmts, PREAMBLE);
         return newSourceFile;
       }
       return sourceFile;
     };
   };
-}
+}