CD - Push release to github releases on tags to master (#30)

* CD - Push release to github releases on tags to master

* Explicitly create artifacts folder

* Add a feature/circleci filter to test circle ci config changes

* Ship to github releaes on tag push

* Add documentation for maintainers, add CHANGLOG, update contribution docs

Author: lakshmi-kannan

.circleci/config.yml

@@ -2,18 +2,6 @@
 #
 # Check https://circleci.com/docs/2.0/language-javascript/ for more details
 #
-aliases:
-  # Workflow filters
-  - &filter-not-release-or-master
-    tags:
-      ignore: /^v[0-9]+(\.[0-9]+){2}(-.+|[^-.]*)$/
-    branches:
-      ignore:
-        - master
-  - &filter-only-master
-    branches:
-      only: master
-
 version: 2
 jobs:
   build:
@@ -27,6 +15,11 @@ jobs:
           - dependency-cache-{{ checksum "yarn.lock" }}
           # fallback to using the latest cache if no exact match is found
           - dependency-cache-
+      - run:
+          name: Setup Environment Variables
+          command: |
+            echo "export GIT_SHA1=$(echo ${CIRCLE_SHA1} | cut -c -7)" >> $BASH_ENV
+            source $BASH_ENV
       - run:
           name: yarn install
           command: 'yarn install --pure-lockfile --no-progress'
@@ -35,6 +28,54 @@ jobs:
             - node_modules
           key: dependency-cache-{{ checksum "yarn.lock" }}
       - run: yarn lint
-      - run: yarn build
+      - run: yarn test
+      - run:
+          name: Create directories for Artifacts
+          command: mkdir -p ~/artifacts/scalyr_plugin/target/
+      - run: 
+          name: Build artifacts
+          command: |
+            yarn build
+            cp -rf dist/ ~/artifacts/scalyr_plugin/
+            echo Plugin git sha is ${GIT_SHA1}
+            cd ~/artifacts/scalyr_plugin/ && tar -czvf scalyr_grafana_plugin_${GIT_SHA1}.tar.gz dist/ && mv scalyr_grafana_plugin_${GIT_SHA1}.tar.gz target/
+      - persist_to_workspace:
+          root: ~/artifacts/scalyr_plugin/target/
+          paths:
+            - scalyr_grafana_plugin_*.tar.gz
+      - store_artifacts:
+          path: ~/artifacts/scalyr_plugin/target/
+          destination: scalyr_grafana_plugin
+  
+  deploy-to-github-releases:
+    docker: 
+      - image: circleci/golang:1.12
+    steps:
+      - attach_workspace:
+          at: ~/artifacts/scalyr_plugin/
+      - run:
+          name: "Publish Release on GitHub"
+          command: |
+            go get github.com/tcnksm/ghr
+            VERSION=${CIRCLE_TAG}
+            echo Releasing version $VERSION
+            ghr -t ${GITHUB_TOKEN} -u ${CIRCLE_PROJECT_USERNAME} -r ${CIRCLE_PROJECT_REPONAME} -c ${CIRCLE_SHA1} -delete ${VERSION} /home/circleci/artifacts/scalyr_plugin/
+
+workflows:
+  version: 2
+  build-and-deploy:
+    jobs:
+      - build:
+          filters:
+            tags:
+              only: /.*/
 
-# TODO: Ship dist/ folder to github releases and tag them
+      - deploy-to-github-releases:
+          requires:
+            - build
+          filters:
+            branches:
+              ignore: /.*/
+            tags:
+              # See https://discuss.circleci.com/t/filter-job-by-tag-not-working-regexp-possibly-unsupported/28484
+              only: /^(\d|[1-9]\d*)\.(\d|[1-9]\d*)\.(\d|[1-9]\d*)(-(0|[1-9A-Za-z-][0-9A-Za-z-]*|[0-9]*[A-Za-z-][0-9A-Za-z-]*)(\.(0|[1-9A-Za-z-][0-9A-Za-z-]*|[0-9]*[A-Za-z-][0-9A-Za-z-]*))*)?(\+[0-9A-Za-z-]+(\.[0-9A-Za-z-]+)*)?$/

CHANGELOG.md

@@ -0,0 +1,7 @@
+# Changelog
+
+## In Development
+
+## 1.0.0
+
+Initial release

HOW_TO_CONTRIBUTE.md

@@ -9,6 +9,9 @@ We welcome and appreciate contributions of any kind (code, tests, documentation,
     and use appropriate labels to indicate the kind of issue.
 * Please fork this repo and create a branch to make your changes
 * Please include the issues you are fixing in the commits
+* Please add an entry in [CHANGELOG.md](./CHANGELOG.md) in `In Development` section along with 
+  github issue number and author information. For example:
+  `Power queries now support blah (#1234) (Alice Wonderland)`
 
 ## Plugin development
 

MAINTAINERS.md

@@ -0,0 +1,17 @@
+# Maintainers Documentation
+
+## Release checklist
+
+* Please make sure CHANGELOG reflects the new version to be released
+  (Usually, that's changing the `In Development` items to be reflected under
+   new version and leaving `In Development` empty)
+* Set the new version to be released in plugin.json and package.json
+* Please push a tag using git commands
+
+    ```bash
+    git tag -a 0.1.0 -m "0.1.0 - Shiny new features and bug fixes"
+    git push upstream 0.1.0
+    ```
+
+* Circle CI builds the tag and ships to github releases
+* Please ensure the released tar.gz contains the `dist` folder