Publish crna-kitchen-sink app to expo

Publish the app to `https://exp.host/@storybook/crna-kitchen-sink?release-channel=branch-name`.

This enables contributors/ code reviewers without much RN experience to easily preview the app from their phone.

A side effect of publishing is it confirms the app at the very least bundles correctly.

.circleci/config.yml

@@ -200,6 +200,10 @@ jobs:
           command: |
             cd examples-native/crna-kitchen-sink
             yarn storybook --smoke-test
+      - run:
+          name: Publish React-Native-App example
+          command: |
+            ./scripts/crna-publish.js
   frontpage:
     <<: *defaults
     steps:

.gitignore

@@ -24,3 +24,4 @@ integration/__image_snapshots__/__diff_output__
 /examples/cra-kitchen-sink/src/__image_snapshots__/__diff_output__/
 lib/*.jar
 lib/**/dll
+.expo/packager-info.json

examples-native/crna-kitchen-sink/package.json

@@ -34,6 +34,7 @@
     "babel-preset-expo": "^5.0.0",
     "core-js": "^2.5.7",
     "jest-expo": "^32.0.0",
+    "expo-cli": "^2.11.9",
     "react-test-renderer": "16.5.1",
     "schedule": "^0.4.0"
   },

package.json

@@ -37,6 +37,7 @@
     "lint:md": "remark -q",
     "lint:package": "sort-package-json",
     "lint:ts": "tslint -p . -c tslint.json -t stylish",
+    "publish:crna": "yarn --cwd examples-native/crna-kitchen-sink expo publish",
     "publish:debug": "npm run publish:latest -- --npm-tag=debug --no-push",
     "publish:latest": "lerna publish --exact --concurrency 1 --force-publish",
     "publish:next": "npm run publish:latest -- --npm-tag=next",

scripts/crna-publish.js

@@ -0,0 +1,49 @@
+#!/usr/bin/env node
+const childProcess = require('child_process');
+const log = require('npmlog');
+
+const getCurrentBranch = () =>
+  childProcess
+    .execSync('git rev-parse --abbrev-ref HEAD')
+    .toString()
+    .trim();
+
+const sanitizeBranchName = branch => branch.replace(/[^a-zA-Z0-9-_]/g, '-');
+
+const expoLogin = (username, password) => {
+  log.info('Logging in to expo');
+  childProcess.execSync(`yarn expo login -u '${username}' -p '${password}'`);
+};
+
+const expoLogout = () => {
+  log.verbose('Logging out from expo');
+  childProcess.execSync('yarn expo logout');
+};
+
+const expoPublish = channel => {
+  log.info(`Publishing to channel ${channel}`);
+  childProcess.execSync(`yarn publish:crna --release-channel=${channel}`);
+  log.info(
+    `crna-kitchen-sink app available at https://exp.host/@storybook/crna-kitchen-sink?release-channel=${channel}`
+  );
+};
+
+const username = process.env.EXPO_USERNAME;
+const password = process.env.EXPO_PASSWORD;
+
+if (!username) {
+  log.error('EXPO_USERNAME environment variable not set');
+  // 0 exit code because builds from forks will not have this variable set
+  process.exit(0);
+}
+
+if (!password) {
+  log.error('EXPO_PASSWORD environment variable not set');
+  // 0 exit code because builds from forks will not have this variable set
+  process.exit(0);
+}
+
+expoLogout();
+expoLogin(username, password);
+expoPublish(sanitizeBranchName(getCurrentBranch()));
+expoLogout();