Automated deployment (paritytech#70)

Created deploy script to automatically deploy new versions to GitHub
packages using Docker.

The deployment was copied from
[stale-pr-finder/.github/workflows/publish.yml](https://github.com/paritytech/stale-pr-finder/blob/main/.github/workflows/publish.yml)

Closes paritytech#55

.github/workflows/publish.yml

@@ -36,4 +36,93 @@ jobs:
         env:
           FILE_NAME: ".github/workflows/review-bot.yml"
 
-# Todo: Add the rest of the action https://github.com/paritytech/stale-pr-finder/blob/main/.github/workflows/publish.yml
+  test-versions:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3.3.0
+      - name: Extract package.json version
+        id: package_version
+        run: echo "VERSION=$(jq '.version' -r package.json)" >> $GITHUB_OUTPUT
+      - name: Extract action.yml version
+        uses: mikefarah/yq@master
+        id: action_image
+        with:
+          cmd: yq '.runs.image' 'action.yml'
+      - name: Parse action.yml version
+        id: action_version
+        run: |
+          echo "IMAGE_VERSION=$(echo $IMAGE_URL | cut -d: -f3)" >> $GITHUB_OUTPUT
+        env:
+          IMAGE_URL: ${{ steps.action_image.outputs.result }}
+      - name: Compare versions
+        run: |
+          echo "Verifying that $IMAGE_VERSION from action.yml is the same as $PACKAGE_VERSION from package.json"
+          [[ $IMAGE_VERSION == $PACKAGE_VERSION ]]
+        env:
+          IMAGE_VERSION: ${{ steps.action_version.outputs.IMAGE_VERSION }}
+          PACKAGE_VERSION: ${{ steps.package_version.outputs.VERSION }}
+
+  tag:
+    if: github.event_name == 'push'
+    needs: [test-image, test-versions]
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    outputs:
+      tagcreated: ${{ steps.autotag.outputs.tagcreated }}
+      tagname: ${{ steps.autotag.outputs.tagname }}
+    steps:
+      - uses: actions/checkout@v3.3.0
+        with:
+          fetch-depth: 0
+      - uses: butlerlogic/action-autotag@stable
+        id: autotag
+        with:
+          head_branch: master
+          tag_prefix: "v"
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: Changelog
+        uses: Bullrich/generate-release-changelog@2.0.2
+        id: Changelog
+        env:
+          REPO: ${{ github.repository }}
+      - name: Create Release
+        if: steps.autotag.outputs.tagname != ''
+        uses: actions/create-release@latest
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ steps.autotag.outputs.tagname }}
+          release_name: Release ${{ steps.autotag.outputs.tagname }}
+          body: |
+            ${{ steps.Changelog.outputs.changelog }}
+  publish:
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+    needs: [tag]
+    if: needs.tag.outputs.tagname != ''
+    steps:
+      - uses: actions/checkout@v3
+      - name: Build image
+        run: docker build . --file Dockerfile --tag $IMAGE_NAME
+      - name: Log into registry
+        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login docker.pkg.github.com -u ${{ github.actor }} --password-stdin
+      - name: Push image
+        run: |
+          IMAGE_ID=docker.pkg.github.com/${{ github.repository }}/$IMAGE_NAME
+          # Change all uppercase to lowercase
+          IMAGE_ID=$(echo $IMAGE_ID | tr '[A-Z]' '[a-z]')
+          # Strip git ref prefix from version
+          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
+          # Strip "v" prefix from tag name
+          [[ ! -z $TAG ]] && VERSION=$(echo $TAG | sed -e 's/^v//')
+          # Use Docker `latest` tag convention
+          [ "$VERSION" == "main" ] && VERSION=latest
+          echo IMAGE_ID=$IMAGE_ID
+          echo VERSION=$VERSION
+          docker tag $IMAGE_NAME $IMAGE_ID:$VERSION
+          docker push $IMAGE_ID:$VERSION
+        env:
+          TAG: ${{ needs.tag.outputs.tagname }}

README.md

@@ -363,5 +363,13 @@ We use `yarn` package manager and `node 18`.
 - Use `yarn test` to run tests on all the `*.test.ts` files.
 - Use `yarn lint` to run the linter.
 - Use `yarn fix` to fix all the auto fixable issues reported by the linter.
+
 ## Deployment
-Pending on https://github.com/paritytech/review-bot/issues/55
+To deploy a new version you need to update two files:
+- [`package.json`](./package.json): Update the version number.
+- [`action.yml`](./action.yml): Update the image number in `runs.image`.
+**Important**: Both versions must have the same number.
+
+When a commit is pushed to the main branch and the versions have changed, the system will automatically tag the commit and release a new package with such version.
+
+You can find all the available versions in the [release section](./releases).

action.yml

@@ -23,8 +23,7 @@ outputs:
     description: 'The name of the repo in owner/repo pattern'
   report:
     description: 'The report of the review'
-
 
 runs:
   using: 'docker'
-  image: 'Dockerfile'
+  image: 'docker://ghcr.io/paritytech/review-bot/action:0.0.1'