build: enable size plugin from angular robot (#14025)

* build: enable size plugin from angular robot

* Improve comment

.circleci/config.yml

@@ -64,7 +64,7 @@ var_9: &docker-firefox-image
 # https://circleci.com/docs/2.0/workflows/#using-workspaces-to-share-data-among-jobs
 var_10: &attach_release_output
   attach_workspace:
-      at: dist/releases
+    at: dist/releases
 
 # -----------------------------
 # Container version of CircleCI
@@ -200,6 +200,25 @@ jobs:
           paths:
             - "**/*"
 
+      # Since there is no UMD bundle that includes everything from the CDK, we need to move
+      # all bundles into a directory. This allows us to store all CDK UMD bundles as job
+      # artifacts that can be picked up by the Angular Github bot.
+      - run:
+          name: Prepare CDK artifacts for publish.
+          command: |
+            mkdir -p  /tmp/cdk-umd-artifacts
+            cp dist/releases/cdk/bundles/*.umd.js /tmp/cdk-umd-artifacts
+
+      # Publish bundle artifacts which will be used to calculate the size change.
+      # Note: Make sure that the size plugin from the Angular robot fetches the artifacts
+      # from this CircleCI job (see .github/angular-robot.yml)
+      - store_artifacts:
+          path: dist/releases/material/bundles/material.umd.js
+          destination: material.umd.js
+      - store_artifacts:
+          path: /tmp/cdk-umd-artifacts
+          destination: /
+
       - *save_cache
 
   # ----------------------------------------

.github/angular-robot.yml

@@ -2,7 +2,12 @@
 
 #options for the size plugin
 size:
-  disabled: true
+  disabled: false
+  # Name of the status that will be responsible for providing
+  # artifacts that will be measured by the robot.
+  circleCiStatusName: "ci/circleci: build_release_packages"
+  # Byte value of maximum allowed change in size
+  maxSizeIncrease: 1500
 
 # options for the merge plugin
 merge:
@@ -55,6 +60,8 @@ merge:
       - "ci/circleci: lint"
       - "ci/circleci: bazel_build_test"
       - "ci/circleci: tests_local_browsers"
+      - "ci/circleci: tests_browserstack"
+      - "ci/circleci: build_release_packages"
 
   # the comment that will be added when the merge label is added despite failing checks, leave empty or set to false to disable
   # {{MERGE_LABEL}} will be replaced by the value of the mergeLabel option