Build all the JS on CI success

.travis.yml

@@ -8,4 +8,7 @@ install:
   - .travis/setup.sh
 
 script:
-  - .travis/ci.sh
+  - .travis/ci.sh
+
+after_success:
+  - .travis/push.sh

.travis/push.sh

@@ -0,0 +1,50 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+readonly GITHUB_ORG="${GITHUB_ORG:-CatalystCode}"
+readonly GITHUB_REPO="${GITHUB_REPO:-ibex-dashboard}"
+readonly TARGET_BRANCH="${TARGET_BRANCH:-master}"
+
+log() {
+  echo "$@" >&2
+}
+
+ensure_preconditions_met() {
+  if [ "${TRAVIS_BRANCH}" != "${TARGET_BRANCH}" ]; then
+    log "Build is targetting ${TRAVIS_BRANCH}, not ${TARGET_BRANCH}"
+    log "Skipping creation of production build"
+    exit 0
+  fi
+  if [ -z "${GITHUB_TOKEN}" ]; then
+    log "GITHUB_TOKEN not set: won't be able to push production build"
+    log "Please configure the token in .travis.yml or the Travis UI"
+    exit 1
+  fi
+}
+
+create_production_build() {
+  CI="" yarn build
+}
+
+setup_git() {
+  git config user.name "Travis CI"
+  git config user.email "travis@travis-ci.org"
+  git remote add origin-travis "https://${GITHUB_TOKEN}@github.com/${GITHUB_ORG}/${GITHUB_REPO}.git"
+}
+
+commit_build_files() {
+  git checkout "${TARGET_BRANCH}"
+  git add --all build
+  echo -e "Travis build: ${TRAVIS_BUILD_NUMBER}\n\nhttps://travis-ci.org/${GITHUB_ORG}/${GITHUB_REPO}/builds/${TRAVIS_BUILD_ID}" | git commit --file -
+}
+
+push_to_github() {
+  git push origin-travis "${TARGET_BRANCH}:${TARGET_BRANCH}"
+}
+
+ensure_preconditions_met
+create_production_build
+setup_git
+commit_build_files
+push_to_github