build: fix broken bazel build (#18335)

packages/compiler-cli/index.ts

@@ -21,6 +21,7 @@ export * from './src/transformers/api';
 export * from './src/transformers/entry_points';
 
 export {main as ngc} from './src/ngc';
+export {performCompilation} from './src/ngc';
 
 // TODO(hansl): moving to Angular 4 need to update this API.
 export {NgTools_InternalApi_NG_2 as __NGTOOLS_PRIVATE_API_2} from './src/ngtools_api';

tools/ngc-wrapped/index.ts

@@ -9,16 +9,24 @@
 // TODO(chuckj): Remove the requirment for a fake 'reflect` implementation from
 // the compiler
 import 'reflect-metadata';
-import {ngc} from '@angular/compiler-cli';
+import {performCompilation} from '@angular/compiler-cli';
 import * as fs from 'fs';
+import * as path from 'path';
 // Note, the tsc_wrapped module comes from rules_typescript, not from @angular/tsc-wrapped
 import {parseTsconfig} from 'tsc_wrapped';
 
 function main(args: string[]) {
   const [{options, bazelOpts, files, config}] = parseTsconfig(args[1]);
   const ngOptions: {expectedOut: string[]} = (config as any).angularCompilerOptions;
 
-  const result = ngc(args, undefined, files, options, ngOptions);
+  const parsedArgs = require('minimist')(args);
+  const project = parsedArgs.p || parsedArgs.project || '.';
+
+  const projectDir = fs.lstatSync(project).isFile() ? path.dirname(project) : project;
+
+  // file names in tsconfig are resolved relative to this absolute path
+  const basePath = path.resolve(process.cwd(), projectDir);
+  const result = performCompilation(basePath, files, options, ngOptions, undefined);
 
   if (result === 0) {
     // Ensure that expected output files exist.
@@ -34,4 +42,4 @@ function main(args: string[]) {
 
 if (require.main === module) {
   process.exitCode = main(process.argv.slice(2));
-}
+}