Use BUILD_TIME as release tag in sentry

Falls back to CIRCLE_SHA1

.circleci/config.yml

@@ -73,6 +73,11 @@ jobs:
       - attach_workspace:
           at: ~/circleci-champaign
       - run: bundle install --path vendor/bundle
+      - run:
+          name: Set BUILD_TIME environment variable
+          command: |
+            echo 'export BUILD_TIME=$(date +%Y%m%d.%H%M)' >> $BASH_ENV
+            source $BASH_ENV
       - run:
           name: Precompile assets
           # NOTE: Webpacker runs yarn on asset precompilation so this will install production assets into node_modules!

app/javascript/packs/sentry.js

@@ -22,7 +22,7 @@ function addReduxState(data) {
 }
 
 Raven.config(process.env.SENTRY_DSN, {
-  release: new Date().toISOString(),
+  release: process.env.BUILD_TIME || process.env.CIRCLE_SHA1,
   environment: process.env.SENTRY_ENVIRONMENT || 'development',
   dataCallback: data => {
     addUserData(data);