create-pr-comment.yaml

name: Create PR comment with PR urls
on:
  workflow_call:
    inputs:
      auto_merge:
        description: "Specifies whether deployment PRs use auto-merge in the gitops-deployments repository"
        required: true
        type: boolean
      updated_prod_cluster_names:
        description: "List of updated production cluster names, needed only for auto-merge PRs"
        required: true
        type: string
      deployment_pr_url:
        description: "URL of the deployment PR in the gitops-deployments repository, needed only for manual-merge PRs"
        required: true
        type: string
      triggering_pr_number:
        description: "Number of the PR triggering the workflow where the comment is created"
        required: true
        type: string

jobs:
  create-comment-with-pr-urls:
    runs-on:
      group: infra1-runners-arc
      labels: runners-small
    steps:
      - name: Checkout gitops-deployments
        uses: actions/checkout@v5
        with:
          repository: gooddata/gitops-deployments
          token: ${{ secrets.TOKEN_GITHUB_YENKINS }}

      - name: Download PR URLs
        if: ${{ inputs.AUTO_MERGE == true }}
        uses: actions/download-artifact@v5
        with:
          path: pr_urls
          pattern: "*_pr_url"
          merge-multiple: 'true'

      - name: Prepare comment with PR URLs
        id: prepare-pr-comment
        run: |
          if [[ "${{ inputs.AUTO_MERGE }}" == "true" ]]; then
            updated_clusters=$(echo '${{ inputs.updated_prod_cluster_names }}' | jq -r '.[]')
            updated_lookup=" $(echo $updated_clusters) "
            repo_name=$(basename "$GITHUB_REPOSITORY")

            comment_file=pr_comment.md
            echo ':exclamation: **THIS PULL REQUEST WILL BE DELIVERED AUTOMATICALLY BY AUTO-MERGE** :exclamation:' >> "$comment_file"
            echo ':exclamation: *REVERT all these gitops-deployments PRs bellow to rollback this change* :exclamation:' >> "$comment_file"

            schedule=$(yq ".repoList.$repo_name" tools/auto_merge/config.yaml -o json 2>/dev/null) 
            if [ "$schedule" = "null" ] || [ -z "$schedule" ]; then
              echo "No specific schedule found for $repo_name, using default clusterMergingSchedule"
              schedule=$(yq -e ".clusterMergingSchedule" tools/auto_merge/config.yaml -o json)
            fi

            echo "$schedule" | jq -c 'to_entries | sort_by(.key)[]' | while read -r entry; do
              minute=$(echo "$entry" | jq -r '.key')
              for cluster in $(echo "$entry" | jq -r '.value[]'); do
                # Check if cluster is in updated clusters
                if [[ "$updated_lookup" == *" $cluster "* ]]; then
                  pr_url_file="pr_urls/${cluster}_pr_url.txt"
                  pr_url=$(cat "$pr_url_file")
                  echo "* Next **${minute}** mins to **${cluster}** cluster :arrow_right:: ${pr_url}" >> "$comment_file"
                fi
              done
            done

            echo ':warning:  Feel free to manually merge those PRs above before the scheduled time to deliver them sooner' >> "$comment_file"
            echo ':point_right:  Merging progress will be informed in [#cd-pipelines-release-prod](https://app.slack.com/client/T02G0PHRH/C0504DF292T) slack channel' >> "$comment_file"

            echo "pr_comment<<EOF" >> $GITHUB_OUTPUT
            cat "$comment_file" >> $GITHUB_OUTPUT
            echo "EOF" >> $GITHUB_OUTPUT
          else
            pr_url=${{ inputs.deployment_pr_url }}

            pr_comment=":exclamation: **THIS PULL REQUEST WILL NEED TO BE DELIVERED MANUALLY** :exclamation:
            :exclamation: *REVERT following gitops-deployments PR bellow to rollback this change* :exclamation:
            * PR for **all clusters** :arrow_right:: ${pr_url}

            :warning:  Pushing another change before rolling out this change might cause confliction in [gitops-deployments](https://github.com/gooddata/gitops-deployments) repo
            :point_right:  Merging progress will be informed in [#cd-pipelines-release-prod](https://app.slack.com/client/T02G0PHRH/C0504DF292T) slack channel"

            echo "pr_comment<<EOF" >> $GITHUB_OUTPUT
            echo "$pr_comment" >> $GITHUB_OUTPUT
            echo "EOF" >> $GITHUB_OUTPUT
          fi

      - name: Comment PR
        uses: actions/github-script@v7
        with:
          script: |
            const prNumber = ${{ inputs.triggering_pr_number }};
            const comment = '${{ toJson(steps.prepare-pr-comment.outputs.pr_comment) }}';
            await github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: prNumber,
              body: comment
            });