Add Circle CI config (#1)

.circleci/config.yml

@@ -0,0 +1,110 @@
+# These environment variables must be set in CircleCI UI
+#
+# NPM_TOKEN - A valid NPM token for releases
+version: 2.1
+
+references:
+  defaults: &defaults
+    working_directory: ~/addons-moz-compare
+    docker:
+      # This is the NodeJS version we run in production.
+      - image: circleci/node:12
+
+  defaults-next: &defaults-next
+    working_directory: ~/addons-moz-compare
+    docker:
+      # This is the next NodeJS version we will support.
+      - image: circleci/node:14
+
+  restore_build_cache: &restore_build_cache
+    restore_cache:
+      name: restore yarn package cache
+      keys:
+        - yarn-packages-{{ checksum "yarn.lock" }}
+
+  run_yarn_install: &run_yarn_install
+    run:
+      name: install dependencies
+      # See: https://github.com/mozilla/addons-frontend/issues/3034
+      command: yarn install --pure-lockfile
+
+  save_build_cache: &save_build_cache
+    save_cache:
+      name: save yarn package cache
+      key: yarn-packages-{{ checksum "yarn.lock" }}
+      paths:
+        - ~/.cache/yarn
+
+  restore_next_build_cache: &restore_next_build_cache
+    restore_cache:
+      name: restore yarn package cache
+      keys:
+        - next-yarn-packages-{{ checksum "yarn.lock" }}
+
+  save_next_build_cache: &save_next_build_cache
+    save_cache:
+      name: save yarn package cache
+      key: next-yarn-packages-{{ checksum "yarn.lock" }}
+      paths:
+        - ~/.cache/yarn
+
+jobs:
+  test:
+    <<: *defaults
+    steps:
+      - checkout
+      - *restore_build_cache
+      - *run_yarn_install
+      - *save_build_cache
+      - run:
+          name: unit tests
+          command: yarn test-ci
+      # Make sure we can build a production package.
+      - run: yarn pack
+      # Set up a workspace to share data between this job and the `release-tag`
+      # one when we want to publish a new npm version.
+      - persist_to_workspace:
+          root: ~/addons-moz-compare
+          paths: .
+      - store_artifacts:
+          path: coverage
+
+  test-next:
+    <<: *defaults-next
+    steps:
+      - checkout
+      - *restore_next_build_cache
+      - *run_yarn_install
+      - *save_next_build_cache
+      - run: yarn test-ci
+
+  release-tag:
+    <<: *defaults
+    steps:
+      - attach_workspace:
+          at: ~/addons-moz-compare
+      - run:
+          name: authenticate with registry
+          # We don't want to expand the token in this file, npm will do it.
+          command: echo '//registry.npmjs.org/:_authToken=${NPM_TOKEN}' > ~/addons-moz-compare/.npmrc
+      - run:
+          name: publish package
+          command: npm publish
+
+workflows:
+  version: 2
+  default-workflow:
+    jobs:
+      - test:
+          filters: # required since `release-tag` has tag filters AND requires `test`
+            tags:
+              only: /.*/
+      - test-next
+      - release-tag:
+          requires:
+            - test
+          filters:
+            tags:
+              only: /.*/
+            branches:
+              ignore: /.*/

.gitignore

@@ -1 +1,3 @@
+coverage/
 node_modules/
+*.tgz

.npmignore

@@ -0,0 +1,3 @@
+.*
+coverage/
+tests/

.npmrc

@@ -0,0 +1,2 @@
+tag-version-prefix = ""
+message = ":arrow_up: release %s"

package.json

@@ -6,7 +6,8 @@
   "author": "Mozilla Add-ons Team",
   "license": "MPL-2.0",
   "scripts": {
-    "test": "jest"
+    "test": "jest",
+    "test-ci": "jest"
   },
   "devDependencies": {
     "jest": "^26.6.3"