fix(bazel): Directly spawn native Bazel binary (#30306)

Instead of launching a Node.js process that in turn spawns Bazel binary,
the Builder could now directly spawn the native binary. This makes the
bootup process slightly more efficient, and allows the Builder to
control spawn options. This works with both Bazel and iBazel.

PR Close #30306

packages/bazel/src/builders/bazel.ts

@@ -8,7 +8,7 @@
 
 /// <reference types='node'/>
 
-import {fork} from 'child_process';
+import {spawn} from 'child_process';
 import {copyFileSync, existsSync, readdirSync, statSync, unlinkSync} from 'fs';
 import {dirname, join, normalize} from 'path';
 
@@ -24,7 +24,7 @@ export function runBazel(
   projectDir = normalize(projectDir);
   binary = normalize(binary);
   return new Promise((resolve, reject) => {
-    const buildProcess = fork(binary, [command, workspaceTarget, ...flags], {
+    const buildProcess = spawn(binary, [command, workspaceTarget, ...flags], {
       cwd: projectDir,
       stdio: 'inherit',
     });
@@ -51,12 +51,12 @@ export function runBazel(
  */
 export function checkInstallation(name: Executable, projectDir: string): string {
   projectDir = normalize(projectDir);
-  const packageName = `@bazel/${name}/package.json`;
+  const packageName = `@bazel/${name}`;
   try {
     const bazelPath = require.resolve(packageName, {
       paths: [projectDir],
     });
-    return dirname(bazelPath);
+    return require(bazelPath).getNativeBinary();
   } catch (error) {
     if (error.code === 'MODULE_NOT_FOUND') {
       throw new Error(

packages/bazel/src/builders/files/__dot__bazelrc.template

@@ -23,6 +23,8 @@ build --incompatible_strict_action_env
 run --incompatible_strict_action_env
 test --incompatible_strict_action_env
 
+build --incompatible_bzl_disallow_load_after_statement=false
+
 test --test_output=errors
 
 # Use the Angular 6 compiler

packages/bazel/src/schematics/ng-add/index.ts

@@ -48,8 +48,8 @@ function addDevDependenciesToPackageJson(options: Schema) {
 
     const devDependencies: {[k: string]: string} = {
       '@angular/bazel': angularCoreVersion,
-      '@bazel/bazel': '^0.24.0',
-      '@bazel/ibazel': '^0.10.1',
+      '@bazel/bazel': '^0.25.1',
+      '@bazel/ibazel': '^0.10.2',
       '@bazel/karma': '0.27.12',
       '@bazel/typescript': '0.27.12',
     };