Create release with template and release notes (#22622)

* Create release with template and release notes

* TMP: update from comments

* TMP: update release template with changelog sections

* TMP: use release hero input for GITHUB_USER template variable

* Rename LATEST -> PREVIOUS

* TMP: apply typo fix

.github/release-template.md

@@ -0,0 +1,28 @@
+This week's push hero is @{{GITHUB_USER}}
+
+Previous Release: [{{PREVIOUS_TAG}}]({{PREVIOUS_RELEASE_URL}})
+
+## Blockers:
+
+## Cherry-picks:
+
+<!-- Link to the actual commits, NOT merge commits. The commits need to appear
+in chronological order so that `git cherry-pick` will apply them correctly. -->
+
+## Before we push:
+
+## Before we start:
+
+## Before we promote:
+
+## After we're done:
+
+## Addons-Frontend Changelog:
+
+<!-- Link to the tag comparison of the target tag and the previous tag for addons-frontend
+https://github.com/mozilla/addons-frontend/compare/<PREVIOUS_TAG...<CURRENT_TAG>
+-->
+
+## Addons Server Changelog:
+
+<!-- This section will be automatically populated once the release notes are auto generated -->

.github/release.yml

@@ -0,0 +1,11 @@
+changelog:
+  categories:
+    - title: Notable things shipping
+      labels:
+        - '*'
+      exclude:
+        labels:
+          - dependencies
+    - title: Dependendabots
+      labels:
+        - dependencies

.github/workflows/draft_release.yml

@@ -0,0 +1,88 @@
+name: Draft Release
+
+on:
+  workflow_dispatch:
+    inputs:
+      push_hero:
+        description: The person responsible for facilitating the release.
+        required: true
+        type: choice
+        options:
+          - kevinmind
+          - diox
+          - eviljeff
+      tag:
+        description: 'Release date YYYY.MM.DD Also used to generate the tag name.'
+        required: true
+
+jobs:
+  draft_release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Create Release Draft
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        shell: bash
+        run: |
+          if [ -z "${{ github.event.inputs.tag }}" ]; then
+            echo "Tag is required"
+            exit 1
+          fi
+
+          if [ -z "${{ github.event.inputs.push_hero }}" ]; then
+            echo "Push hero is required"
+            exit 1
+          fi
+
+          # Format current date as YYYY.MM.DD
+
+          if [[ "${{ github.event_name}}" == 'workflow_dispatch' ]]; then
+            tag="${{ github.event.inputs.tag }}"
+          fi
+
+          # Validate the tag is formatted correctly YYYY.MM.DD or YYYY.MM.DD-X
+          # where X is a whole number greater than zero
+          if [[ ! $tag =~ ^[0-9]{4}\.[0-9]{2}\.[0-9]{2}(-[0-9]+)?$ ]]; then
+            echo "Invalid tag format. Must be YYYY.MM.DD or YYYY.MM.DD-X"
+            exit 1
+          fi
+
+          # Verify that a release with this tag does not already exist
+          if gh release view $tag &> /dev/null; then
+            echo "Release $tag-next already exists"
+            exit 1
+          fi
+
+          # Get the latest release tag
+          previous_release=$(
+            gh api \
+            -H "Accept: application/vnd.github+json" \
+            -H "X-GitHub-Api-Version: 2022-11-28" \
+            /repos/mozilla/addons-server/releases/latest
+          )
+
+          previous_tag=$(echo $previous_release | jq -r '.tag_name')
+          previous_release_url=$(echo $previous_release | jq -r '.html_url')
+
+          cat <<EOF
+          $previous_release
+          EOF
+
+          # Cat the file ../release-template.md
+          template=$(cat .github/release-template.md)
+
+          # Replace {{GITHUB_USER}} in template with ${{ github.event.inputs.push_hero }}
+          template=${template//\{\{GITHUB_USER\}\}/${{ github.event.inputs.push_hero }}}
+
+          # Replace {{PREVIOUS_TAG}} in template with $previous_tag
+          template=${template//\{\{PREVIOUS_TAG\}\}/$previous_tag}
+
+          # Replace {{PREVIOUS_RELEASE_URL}} in template with $previous_release_url
+          template=${template//\{\{PREVIOUS_RELEASE_URL\}\}/$previous_release_url}
+
+          gh release create $tag \
+            --title $tag \
+            --target master \
+            --notes "$template" \
+            --draft