create-release-branch.yml

name: Create Release Branch and PR

on:
  workflow_dispatch:

jobs:
  create-release-branch:
    runs-on: ubuntu-latest
    
    steps:
      - name: Check out the code
        uses: actions/checkout@v6
        with:
          ref: dev
          
      - name: Get release date and branch name
        run: |
          RELEASE_DATE=$(date +'%Y-%m-%d')
          echo "RELEASE_DATE=$RELEASE_DATE" >> $GITHUB_ENV
          echo "BRANCH_NAME=release/$RELEASE_DATE" >> $GITHUB_ENV

      - name: Create or update branch
        run: |
          git checkout -B $BRANCH_NAME
          git push --force --set-upstream origin $BRANCH_NAME

      - name: Create pull request using GitHub CLI
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          # Create PR if it doesn't already exist
          if ! gh pr view "$BRANCH_NAME" --json number &>/dev/null; then
            gh pr create \
              --base main \
              --head "$BRANCH_NAME" \
              --title "release: $RELEASE_DATE" \
              --body ":rocket: Automated release PR"
          fi

          # Always ensure labels are applied (handles 502 / retry scenarios)
          gh pr edit "$BRANCH_NAME" --add-label "release,auto-pr"

      - name: Comment build links on the PR
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          PUBLIC_URL_PREFIX: ${{ vars.EXPLORER_TEAM_S3_BUCKET_PUBLIC_URL }}
        run: |
          set -euo pipefail

          # Bot-created PRs trigger no workflows, so no build runs and no badge
          # comment gets posted. The release branch is cut from dev tip, whose
          # SHA was already built by the push to dev — reuse that run's
          # artifacts instead of rebuilding.
          PR_NUMBER=$(gh pr view "$BRANCH_NAME" --json number --jq '.number')
          EXISTING=$(gh api "repos/${GITHUB_REPOSITORY}/issues/${PR_NUMBER}/comments?per_page=100" \
            --jq '[.[] | select(.user.login == "github-actions[bot]") | select(.body | contains("img.shields.io/badge/Build"))] | .[0] // empty')

          # A "Build Not Found" comment is upgraded in place on re-run once the
          # build exists; only a success comment short-circuits.
          if [ -n "$EXISTING" ] && jq -e '.body | contains("Build-Success")' <<< "$EXISTING" > /dev/null; then
            echo "Build links comment already present, skipping."
            exit 0
          fi
          COMMENT_ID=$([ -n "$EXISTING" ] && jq -r '.id' <<< "$EXISTING" || echo "")

          post_comment() {
            if [ -n "$COMMENT_ID" ]; then
              gh api -X PATCH "repos/${GITHUB_REPOSITORY}/issues/comments/${COMMENT_ID}" -F body=@comment.md > /dev/null
            else
              gh pr comment "$BRANCH_NAME" --body-file comment.md
            fi
          }

          HEAD_SHA=$(git rev-parse HEAD)
          SHORT_SHA="${HEAD_SHA:0:7}"
          REPO_NAME="${GITHUB_REPOSITORY#*/}"

          # Scoped to the build workflow file — a repo-wide head_sha listing
          # gets crowded out by bot runs sharing the SHA and the build falls
          # past the first page.
          RUN_JSON=$(gh api "repos/${GITHUB_REPOSITORY}/actions/workflows/build-unitycloud.yml/runs?head_sha=${HEAD_SHA}&status=success&per_page=20" \
            --jq '[.workflow_runs[] | select(.event == "pull_request" or .event == "push")] | .[0]')

          if [ -z "$RUN_JSON" ] || [ "$RUN_JSON" = "null" ]; then
            {
              echo '![badge]  <img src="https://ui.decentraland.org/decentraland_256x256.png" width="30">'
              echo ""
              echo "No completed Unity Cloud Build found for \`${SHORT_SHA}\` — check the [build runs](${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/actions/workflows/build-unitycloud.yml) and re-run this workflow once one finishes."
              echo ""
              echo "[badge]: https://img.shields.io/badge/Build-Not%20Found-yellow?logo=github&style=for-the-badge"
            } > comment.md
            post_comment
            exit 0
          fi

          RUN_ID=$(jq -r '.id' <<< "$RUN_JSON")
          RUN_NUMBER=$(jq -r '.run_number' <<< "$RUN_JSON")
          SUITE_ID=$(jq -r '.check_suite_id' <<< "$RUN_JSON")
          RUN_EVENT=$(jq -r '.event' <<< "$RUN_JSON")
          RUN_BRANCH=$(jq -r '.head_branch' <<< "$RUN_JSON")
          BUILD_DATE=$(jq -r '.updated_at' <<< "$RUN_JSON")

          # Same event -> S3 prefix mapping as build-unitycloud.yml
          case "$RUN_EVENT" in
            pull_request) BUILD_PREFIX="pr" ;;
            push) BUILD_PREFIX="pu" ;;
            merge_group) BUILD_PREFIX="mg" ;;
            workflow_dispatch) BUILD_PREFIX="wd" ;;
            workflow_call) BUILD_PREFIX="wc" ;;
            schedule) BUILD_PREFIX="sc" ;;
            *) BUILD_PREFIX="gn" ;;
          esac

          S3_PATH="@dcl/${REPO_NAME}/branch/${RUN_BRANCH}/${BUILD_PREFIX}-${RUN_NUMBER}-${SHORT_SHA}"

          WINDOWS_ARTIFACT_ID=$(gh api "repos/${GITHUB_REPOSITORY}/actions/runs/${RUN_ID}/artifacts" \
            --jq '.artifacts[] | select(.name == "Decentraland_windows64") | .id' || true)
          MAC_ARTIFACT_ID=$(gh api "repos/${GITHUB_REPOSITORY}/actions/runs/${RUN_ID}/artifacts" \
            --jq '.artifacts[] | select(.name == "Decentraland_macos") | .id' || true)

          {
            echo '![badge]  <img src="https://ui.decentraland.org/decentraland_256x256.png" width="30">'
            echo ""
            echo "Windows and Mac build successful in Unity Cloud! Links reused from the existing \`${RUN_BRANCH}\` build of this commit."
            echo ""
            echo "| Name                | Link                    |"
            echo "| --------            | ----------------------- |"
            echo "| Commit              | ${HEAD_SHA} |"
            echo "| Logs                | ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/actions/runs/${RUN_ID} |"
            echo "| Download Windows    | ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/suites/${SUITE_ID}/artifacts/${WINDOWS_ARTIFACT_ID} |"
            echo "| Download Windows S3 | ${PUBLIC_URL_PREFIX}/${S3_PATH}/Decentraland_windows64.zip |"
            echo "| Download Mac        | ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/suites/${SUITE_ID}/artifacts/${MAC_ARTIFACT_ID} |"
            echo "| Download Mac S3     | ${PUBLIC_URL_PREFIX}/${S3_PATH}/Decentraland_macos.zip |"
            echo "| Built on            | ${BUILD_DATE} |"
            echo ""
            echo "[badge]: https://img.shields.io/badge/Build-Success!-3fb950?logo=github&style=for-the-badge"
          } > comment.md
          post_comment