circle-ci speed: multiple parallel build jobs

.circleci/config.yml

@@ -3,40 +3,93 @@ version: 2
 
 # Reusable definitions shared between jobs
 defs:
+  defaults: &defaults
+    docker:
+      - image: circleci/node:carbon-browsers
+    working_directory: ~/app
   steps:
-    step-update-path: &step-update-path
-      name: Update $PATH
+    step-update-env: &step-update-env
+      name: Update environment
       command: |
-        echo "export PATH=$PATH:$(yarn global bin)" >> $BASH_ENV
+        echo "export PATH=$PATH:$(yarn global bin):~/app/node_modules/.bin" >> $BASH_ENV
+        git config --global user.email "$CIRCLECI_EMAIL"
+        git config --global user.name "Circle CI Build Bot"
 
 jobs:
-  build:
-    docker:
-      - image: circleci/node:carbon-browsers
+  checkout_code:
+    <<: *defaults
     steps:
       - checkout
-      - run:
-          name: Configure build environment
-          command: |
-            git config --global user.email "$CIRCLECI_EMAIL"
-            git config --global user.name "Circle CI Build Bot"
+      - persist_to_workspace:
+          root: .
+          paths:
+            - .
+  install_dependencies:
+    <<: *defaults
+    steps:
+      - attach_workspace:
+          at: .
       - restore_cache:
-          key: dependency-cache-{{ checksum "yarn.lock" }}
+          keys:
+            - dependency-cache-{{ .Branch }}-{{ checksum "yarn.lock" }}
+            - dependency-cache-{{ .Branch }}-
+            - dependency-cache-
       - run:
           name: Install dependencies
           command: |
             yarn global add [email protected]
             yarn
       - save_cache:
-          key: dependency-cache-{{ checksum "yarn.lock" }}
+          key: dependency-cache-{{ .Branch }}-{{ checksum "yarn.lock" }}
           paths:
             - ./node_modules
+      - persist_to_workspace:
+          root: .
+          paths:
+            - .
+  lint:
+    <<: *defaults
+    steps:
+      - attach_workspace:
+          at: .
+      - run:
+          <<: *step-update-env
+      - run:
+          name: Run linters
+          command: |
+            yarn lint
+  test:
+    <<: *defaults
+    steps:
+      - attach_workspace:
+          at: .
       - run:
-          <<: *step-update-path
+          <<: *step-update-env
       - run:
-          name: Run tests
+          name: Ember build
           command: |
             npm rebuild node-sass 2>&1 > /dev/null
             ember --version --verbose
-            yarn test
+            # see: https://github.com/stefanpenner/broccoli-persistent-filter#warning
+            BROCCOLI_PERSISTENT_FILTER_CACHE_ROOT=cache; COVERAGE=true ember build -e test --output-path=dist
+      - run:
+          name: Ember test
+          command: |
+            ember --version --verbose
+            BROCCOLI_PERSISTENT_FILTER_CACHE_ROOT=cache; yarn test --path=dist
             yarn coverage
+
+workflows:
+  version: 2
+  build_lint_test:
+    jobs:
+      - checkout_code
+      - install_dependencies:
+          requires:
+            - checkout_code
+      - lint:
+          requires:
+            - install_dependencies
+      - test:
+          requires:
+            - install_dependencies