Support adapter builds and add tests.

packages/@apphosting/build/e2e/.gitignore

@@ -0,0 +1 @@
+runs

packages/@apphosting/build/e2e/adapter-builds.spec.ts

@@ -0,0 +1,32 @@
+import * as assert from "assert";
+import { posix } from "path";
+import pkg from "@apphosting/common";
+import { scenarios } from "./scenarios.ts";
+import fsExtra from "fs-extra";
+import { parse as parseYaml } from "yaml";
+
+const { readFileSync, mkdirp, rmdir, readJSONSync } = fsExtra;
+const { OutputBundleConfig } = pkg;
+
+const scenario = process.env.SCENARIO;
+if (!scenario) {
+  throw new Error("SCENARIO environment variable expected");
+}
+
+const runId = process.env.RUN_ID;
+if (!runId) {
+  throw new Error("RUN_ID environment variable expected");
+}
+
+const bundleYaml = posix.join(process.cwd(), "e2e", "runs", runId, ".apphosting", "bundle.yaml");
+describe("supported framework apps", () => {
+  it("apps have bundle.yaml correctly generated", async () => {
+    const bundle = parseYaml(readFileSync(bundleYaml, "utf8")) as OutputBundleConfig;
+
+    assert.deepStrictEqual(scenarios.get(scenario).expectedBundleYaml.runConfig, bundle.runConfig);
+    assert.deepStrictEqual(
+      scenarios.get(scenario).expectedBundleYaml.metadata.adapterPackageName,
+      bundle.metadata.adapterPackageName,
+    );
+  });
+});

packages/@apphosting/build/e2e/run-local-build.ts

@@ -0,0 +1,95 @@
+import { cp } from "fs/promises";
+import promiseSpawn from "@npmcli/promise-spawn";
+import { dirname, join, relative } from "path";
+import { fileURLToPath } from "url";
+import { parse as parseYaml } from "yaml";
+import fsExtra from "fs-extra";
+import { scenarios } from "./scenarios.ts";
+
+const { readFileSync, mkdirp, rmdir } = fsExtra;
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+
+const errors: any[] = [];
+
+await rmdir(join(__dirname, "runs"), { recursive: true }).catch(() => undefined);
+
+// Run each scenario
+for (const [scenarioName, scenario] of scenarios) {
+  console.log(
+    `\n\n${"=".repeat(80)}\n${" ".repeat(
+      5,
+    )}RUNNING SCENARIO: ${scenarioName.toUpperCase()}${" ".repeat(5)}\n${"=".repeat(80)}`,
+  );
+
+  const runId = `${scenarioName}-${Math.random().toString().split(".")[1]}`;
+  const cwd = join(__dirname, "runs", runId);
+  await mkdirp(cwd);
+
+  const starterTemplateDir = scenarioName.includes("nextjs")
+    ? "../../../starters/nextjs/basic"
+    : "../../../starters/angular/basic";
+  console.log(`[${runId}] Copying ${starterTemplateDir} to working directory`);
+  await cp(starterTemplateDir, cwd, { recursive: true });
+
+  console.log(`[${runId}] > npm ci --silent --no-progress`);
+  await promiseSpawn("npm", ["ci", "--silent", "--no-progress"], {
+    cwd,
+    stdio: "inherit",
+    shell: true,
+  });
+
+  const buildScript = relative(cwd, join(__dirname, "../dist/bin/localbuild.js"));
+  const buildLogPath = join(cwd, "build.log");
+  console.log(`[${runId}] > node ${buildScript} (output written to ${buildLogPath})`);
+
+  const packageJson = JSON.parse(readFileSync(join(cwd, "package.json"), "utf-8"));
+  const frameworkVersion = scenarioName.includes("nextjs")
+    ? packageJson.dependencies.next.replace("^", "")
+    : JSON.parse(
+        readFileSync(join(cwd, "node_modules", "@angular", "core", "package.json"), "utf-8"),
+      ).version;
+
+  try {
+    const result = await promiseSpawn("node", [buildScript, ...scenario.inputs], {
+      cwd,
+      stdioString: true,
+      stdio: "pipe",
+      shell: true,
+      env: {
+        ...process.env,
+        FRAMEWORK_VERSION: frameworkVersion,
+      },
+    });
+    // Write stdout and stderr to the log file
+    fsExtra.writeFileSync(buildLogPath, result.stdout + result.stderr);
+
+    try {
+      // Determine which test files to run
+      const testPattern = scenario.tests
+        ? scenario.tests.map((test) => `e2e/${test}`).join(" ")
+        : "e2e/*.spec.ts";
+
+      console.log(`> SCENARIO=${scenarioName} ts-mocha -p tsconfig.json ${testPattern}`);
+
+      await promiseSpawn("ts-mocha", ["-p", "tsconfig.json", ...testPattern.split(" ")], {
+        shell: true,
+        stdio: "inherit",
+        env: {
+          ...process.env,
+          SCENARIO: scenarioName,
+          RUN_ID: runId,
+        },
+      });
+    } catch (e) {
+      errors.push(e);
+    }
+  } catch (e) {
+    console.error(`Error in scenario ${scenarioName}:`, e);
+    errors.push(e);
+  }
+}
+if (errors.length) {
+  console.error(errors);
+  process.exit(1);
+}

packages/@apphosting/build/e2e/scenarios.ts

@@ -0,0 +1,41 @@
+interface Scenario {
+  inputs: string[];
+  expectedBundleYaml: {};
+  tests?: string[]; // List of test files to run
+}
+
+export const scenarios = new Map([
+  [
+    "nextjs-app",
+    {
+      inputs: ["./", "--framework", "nextjs"],
+      expectedBundleYaml: {
+        version: "v1",
+        runConfig: {
+          runCommand: "node .next/standalone/server.js",
+        },
+        metadata: {
+          adapterPackageName: "@apphosting/adapter-nextjs",
+        },
+      },
+      tests: ["adapter-builds.spec.ts"],
+    },
+  ],
+  [
+    "angular-app",
+    {
+      inputs: ["./", "--framework", "angular"],
+      expectedBundleYaml: {
+        version: "v1",
+        runConfig: {
+          runCommand: "node dist/firebase-app-hosting-angular/server/server.mjs",
+          environmentVariables: [],
+        },
+        metadata: {
+          adapterPackageName: "@apphosting/adapter-angular",
+        },
+      },
+      tests: ["adapter-builds.spec.ts"],
+    },
+  ],
+]);

packages/@apphosting/build/package.json

@@ -8,8 +8,8 @@
         "url": "git+https://github.com/FirebaseExtended/firebase-framework-tools.git"
     },
     "bin": {
-      "build": "dist/bin/build.js",
-      "apphosting-local-build": "dist/bin/localbuild.js"
+        "build": "dist/bin/build.js",
+        "apphosting-local-build": "dist/bin/localbuild.js"
     },
     "author": {
         "name": "Firebase",
@@ -21,7 +21,9 @@
     "type": "module",
     "sideEffects": false,
     "scripts": {
-      "build": "rm -rf dist && tsc && chmod +x ./dist/bin/*"
+        "build": "rm -rf dist && tsc && chmod +x ./dist/bin/*",
+        "test": "npm run test:functional",
+        "test:functional": "node --loader ts-node/esm ./e2e/run-local-build.ts"
     },
     "exports": {
         ".": {
@@ -38,9 +40,13 @@
         "colorette": "^2.0.20",
         "commander": "^11.1.0",
         "npm-pick-manifest": "^9.0.0",
-        "ts-node": "^10.9.1"
+        "ts-node": "^10.9.1",
+        "tsc": "^2.0.4"
     },
     "devDependencies": {
-      "@types/commander": "*"
+      "@types/commander": "*",
+      "ts-mocha": "*",
+      "ts-node": "*",
+      "typescript": "*"
     }
 }

packages/@apphosting/build/src/adapter-builds.ts

@@ -0,0 +1,33 @@
+import promiseSpawn from "@npmcli/promise-spawn";
+import { yellow, bgRed, bold } from "colorette";
+
+export async function adapterBuild(projectRoot: string, framework: string) {
+  // TODO(#382): We are using the latest framework adapter versions, but in the future
+  // we should parse the framework version and use the matching adapter version.
+  const adapterName = `@apphosting/adapter-${framework}`;
+  const packumentResponse = await fetch(`https://registry.npmjs.org/${adapterName}`);
+  if (!packumentResponse.ok)
+    throw new Error(
+      `Failed to fetch ${adapterName}: ${packumentResponse.status} ${packumentResponse.statusText}`,
+    );
+  let packument;
+  try {
+    packument = await packumentResponse.json();
+  } catch (e) {
+    throw new Error(`Failed to parse response from NPM registry for ${adapterName}.`);
+  }
+  const adapterVersion = packument?.["dist-tags"]?.["latest"];
+  if (!adapterVersion) {
+    throw new Error(`Could not find 'latest' dist-tag for ${adapterName}`);
+  }
+  // TODO(#382): should check for existence of adapter in app's package.json and use that version instead.
+
+  console.log(" 🔥", bgRed(` ${adapterName}@${yellow(bold(adapterVersion))} `), "\n");
+
+  const buildCommand = `apphosting-adapter-${framework}-build`;
+  await promiseSpawn("npx", ["-y", "-p", `${adapterName}@${adapterVersion}`, buildCommand], {
+    cwd: projectRoot,
+    shell: true,
+    stdio: "inherit",
+  });
+}

packages/@apphosting/build/src/bin/localbuild.ts

@@ -1,46 +1,23 @@
 #! /usr/bin/env node
-import { spawn } from "child_process";
+import { SupportedFrameworks } from "@apphosting/common";
+import { adapterBuild } from "../adapter-builds.js";
 import { program } from "commander";
-import { yellow, bgRed, bold } from "colorette";
 
-// TODO(#382): add framework option later or incorporate micro-discovery.
-// TODO(#382): parse apphosting.yaml for environment variables / secrets.
-// TODO(#382): parse apphosting.yaml for runConfig and include in buildSchema
-// TODO(#382): Support custom build and run commands (parse and pass run command to build schema).
 program
   .argument("<projectRoot>", "path to the project's root directory")
-  .action(async (projectRoot: string) => {
-    const framework = "nextjs";
-    // TODO(#382): We are using the latest framework adapter versions, but in the future
-    // we should parse the framework version and use the matching adapter version.
-    const adapterName = `@apphosting/adapter-nextjs`;
-    const packumentResponse = await fetch(`https://registry.npmjs.org/${adapterName}`);
-    if (!packumentResponse.ok) throw new Error(`Something went wrong fetching ${adapterName}`);
-    const packument = await packumentResponse.json();
-    const adapterVersion = packument?.["dist-tags"]?.["latest"];
-    if (!adapterVersion) {
-      throw new Error(`Could not find 'latest' dist-tag for ${adapterName}`);
-    }
-    // TODO(#382): should check for existence of adapter in app's package.json and use that version instead.
-
-    console.log(" 🔥", bgRed(` ${adapterName}@${yellow(bold(adapterVersion))} `), "\n");
+  .option("--framework <framework>")
+  .action(async (projectRoot, opts) => {
+    // TODO(#382): support other apphosting.*.yaml files.
 
-    const buildCommand = `apphosting-adapter-${framework}-build`;
-    await new Promise<void>((resolve, reject) => {
-      const child = spawn("npx", ["-y", "-p", `${adapterName}@${adapterVersion}`, buildCommand], {
-        cwd: projectRoot,
-        shell: true,
-        stdio: "inherit",
-      });
+    // TODO(#382): parse apphosting.yaml for environment variables / secrets needed during build time.
+    if (opts.framework && SupportedFrameworks.includes(opts.framework)) {
+      // TODO(#382): Skip this if there's a custom build command in apphosting.yaml.
+      await adapterBuild(projectRoot, opts.framework);
+    }
 
-      child.on("exit", (code) => {
-        if (code !== 0) {
-          reject(new Error(`framework adapter build failed with error code ${code}.`));
-        }
-        resolve();
-      });
-    });
-    //  TODO(#382): parse bundle.yaml and apphosting.yaml and output a buildschema somewhere.
+    // TODO(#382): Parse apphosting.yaml to set custom run command in bundle.yaml
+    // TODO(#382): parse apphosting.yaml for environment variables / secrets needed during runtime to include in the bunde.yaml
+    // TODO(#382): parse apphosting.yaml for runConfig to include in bundle.yaml
   });
 
 program.parse();

packages/@apphosting/build/tsconfig.json

@@ -3,8 +3,13 @@
   "compilerOptions": {
     "noEmit": false,
     "outDir": "dist",
-    "rootDir": "src"
-
+    "rootDir": "src",
+    "allowImportingTsExtensions": true
+  },
+  "ts-node": {
+    "esm": true,
+    "logError": true,
+    "pretty": true
   },
   "include": [
     "src/index.ts",