skip build if .apphosting dir exists already

Author: Yuangwang

packages/@apphosting/adapter-angular/src/bin/build.ts

@@ -4,6 +4,7 @@ import {
   checkBuildConditions,
   validateOutputDirectory,
   parseOutputBundleOptions,
+  outputBundleExists
 } from "../utils.js";
 import { getBuildOptions, runBuild } from "@apphosting/common";
 
@@ -22,7 +23,9 @@ if (!output) {
   throw new Error("No output from Angular build command, expecting a build manifest file.");
 }
 const outputBundleOptions = parseOutputBundleOptions(output);
-const root = process.cwd();
-await generateBuildOutput(root, outputBundleOptions, process.env.FRAMEWORK_VERSION);
-
-await validateOutputDirectory(outputBundleOptions);
+if (!outputBundleExists(outputBundleOptions)){
+  const root = process.cwd();
+  await generateBuildOutput(root, outputBundleOptions, process.env.FRAMEWORK_VERSION);
+  
+  await validateOutputDirectory(outputBundleOptions);
+}

packages/@apphosting/adapter-angular/src/utils.ts

@@ -226,3 +226,10 @@ export const isMain = (meta: ImportMeta) => {
   if (!process.argv[1]) return false;
   return process.argv[1] === fileURLToPath(meta.url);
 };
+
+export const outputBundleExists  = (outputBundleOptions: OutputBundleOptions) => {
+  if (existsSync(dirname(outputBundleOptions.bundleYamlPath))){
+    return true;
+  }
+  return false;
+}