Report size of app bundles on PRs (#28041)

Summary:
Pull Request resolved: #28041

Report size of app bundles on PRs. See [React Native Benchmark Suite](react-native-community/discussions-and-proposals#186) for further discussion.

## Changelog

[Internal] [Added] - Report size of app bundles on PRs
Pull Request resolved: #28019

Test Plan: PRs should start seeing comments from a bot with app bundle sizes, given that they got built successfully.

Reviewed By: cpojer

Differential Revision: D19859187

Pulled By: hramos

fbshipit-source-id: 3920dc60e6fd073928388e6ae52fc2ba1bc745ac

.circleci/config.yml

@@ -94,6 +94,12 @@ commands:
             - ~/okbuck
           key: v3-buck-v2019.01.10.01-{{ checksum "scripts/circleci/buck_fetch.sh" }}
 
+  install_github_bot_deps:
+    steps:
+      - run:
+          name: Install GitHub bot dependencies
+          command: cd bots && yarn install --non-interactive --cache-folder ~/.cache/yarn
+
   brew_install:
     parameters:
       package:
@@ -217,11 +223,11 @@ jobs:
           checkout_type: node
       - run_yarn
 
+      - install_github_bot_deps
+
       - run:
-          name: Install dependencies
-          command: |
-            sudo apt update && sudo apt install -y shellcheck jq
-            cd bots && yarn install --non-interactive --cache-folder ~/.cache/yarn
+          name: Install additional GitHub bot dependencies
+          command: sudo apt update && sudo apt install -y shellcheck jq
 
       - run:
           name: Run linters against modified files (analysis-bot)
@@ -355,6 +361,10 @@ jobs:
   # Runs iOS end-to-end tests
   test_ios_e2e:
     executor: reactnativeios
+    # The public github tokens are publicly visible by design
+    environment:
+      - PUBLIC_GITHUB_TOKEN_A: "78a72af35445ca3f8180"
+      - PUBLIC_GITHUB_TOKEN_B: "b1a98e0bbd56ff1ccba1"
     steps:
       - restore_cache_checkout:
           checkout_type: ios
@@ -381,6 +391,7 @@ jobs:
                 package: applesimutils
             - brew_install:
                 package: watchman
+
       # Configure Watchman
       - run: touch .watchmanconfig
 
@@ -400,6 +411,12 @@ jobs:
           command: yarn run build-ios-e2e && yarn run test-ios-e2e
           when: always
 
+      - install_github_bot_deps
+      - run:
+          name: Report size of RNTester.app
+          command: GITHUB_TOKEN="$PUBLIC_GITHUB_TOKEN_A""$PUBLIC_GITHUB_TOKEN_B" scripts/circleci/report-bundle-size.sh ios
+          when: always
+
       - run:
           name: Run iOS End-to-End Tests
           command: |
@@ -440,6 +457,10 @@ jobs:
   # Run Android tests
   test_android:
     executor: reactnativeandroid
+    # The public github tokens are publicly visible by design
+    environment:
+      - PUBLIC_GITHUB_TOKEN_A: "78a72af35445ca3f8180"
+      - PUBLIC_GITHUB_TOKEN_B: "b1a98e0bbd56ff1ccba1"
     steps:
       - restore_cache_checkout:
           checkout_type: android
@@ -511,6 +532,11 @@ jobs:
           name: Build Android RNTester App
           command: ./gradlew RNTester:android:app:assembleRelease
 
+      - install_github_bot_deps
+      - run:
+          name: Report size of RNTester.apk
+          command: GITHUB_TOKEN="$PUBLIC_GITHUB_TOKEN_A""$PUBLIC_GITHUB_TOKEN_B" scripts/circleci/report-bundle-size.sh android
+
       # Collect Results
       - run:
           name: Collect Test Results

bots/make-comment.js

@@ -0,0 +1,48 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+'use strict';
+
+const {GITHUB_TOKEN, GITHUB_OWNER, GITHUB_REPO, GITHUB_PR_NUMBER} = process.env;
+if (!GITHUB_TOKEN || !GITHUB_OWNER || !GITHUB_REPO || !GITHUB_PR_NUMBER) {
+  if (!GITHUB_TOKEN) {
+    console.error(
+      'Missing GITHUB_TOKEN. Example: 5fd88b964fa214c4be2b144dc5af5d486a2f8c1e. PR feedback cannot be provided on GitHub without a valid token.',
+    );
+  }
+  if (!GITHUB_OWNER) {
+    console.error('Missing GITHUB_OWNER. Example: facebook');
+  }
+  if (!GITHUB_REPO) {
+    console.error('Missing GITHUB_REPO. Example: react-native');
+  }
+  if (!GITHUB_PR_NUMBER) {
+    console.error(
+      'Missing GITHUB_PR_NUMBER. Example: 4687. PR feedback cannot be provided on GitHub without a valid pull request number.',
+    );
+  }
+  process.exit(1);
+}
+
+const {[2]: body} = process.argv;
+if (!body) {
+  process.exit(0);
+}
+
+const octokit = require('@octokit/rest')();
+octokit.authenticate({
+  type: 'oauth',
+  token: GITHUB_TOKEN,
+});
+octokit.issues.createComment({
+  owner: GITHUB_OWNER,
+  repo: GITHUB_REPO,
+  issue_number: GITHUB_PR_NUMBER,
+  body,
+});

bots/package.json

@@ -9,6 +9,6 @@
     "minimatch": "^3.0.4"
   },
   "dependencies": {
-    "@octokit/rest": "15.18.0"
+    "@octokit/rest": "^16.43.0"
   }
 }