chore(storybook): Added publishing of PR storybook to S3 bucket

.gitignore

@@ -7,7 +7,6 @@
 /coverage
 
 # production
-/build
 /dist
 
 # misc

.travis.yml

@@ -3,6 +3,20 @@ node_js:
   - 7
 cache:
   yarn: true
+  directories:
+    - node_modules
+
+before_install:
+  - pip install --user awscli
+  - export PATH=$PATH:$HOME/.local/bin
+
 script:
   - yarn run coverage && cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js
   - yarn run build
+  - yarn run build-storybook
+  - node ./build/aws-deploy.js
+
+after_script:
+  # TODO comment on PR with link to PR storybook on S3 and notify slack room
+  - echo "PR storybook can be found at:"
+  - echo "http://react-audio-vis-prs.s3-ap-southeast-2.amazonaws.com/$TRAVIS_PULL_REQUEST_BRANCH/index.html"

build/aws-deploy.js

@@ -0,0 +1,24 @@
+const execSync = require('child_process').execSync;
+
+const isPrBuild = (prBranch) => {
+  return prBranch && prBranch !== "master";
+};
+
+const staticSizeNotTooLarge = (staticBookSize) => {
+  const tenMB = 10 * (2 << 9);
+  return !isNaN(staticBookSize) && staticBookSize < tenMB;
+};
+
+const {TRAVIS_PULL_REQUEST_BRANCH: prBranch} = process.env;
+console.log(prBranch);
+if (isPrBuild(prBranch)) {
+  const result = execSync(`du -sk storybook-static | sed 's/[^0-9]*//g'`);
+  const staticBookSize = Number.parseInt(result.toString());
+
+  if (staticSizeNotTooLarge(staticBookSize)) {
+    const result = execSync(
+      `aws s3 cp ${__dirname}/../storybook-static s3://react-audio-vis-prs/${prBranch} --recursive`,
+      {stdio: [0, 1, 2]}
+    );
+  }
+}