ci(fix): delete branch prereleases started in prior versions on merge to main (#15)

Co-authored-by: Michael Brooks <mbrooks@slack-corp.com>

Author: zimeg

.github/workflows/delete-pr-build-on-close.yml

@@ -18,8 +18,18 @@ jobs:
         shell: bash
         run: |
           # Figure out tag name from branch name. This is coupled to the tag name generation that exists in .circleci/config.yml's `create-github-release` job.
-          LATEST_RELEASE_TAG=$(gh release list --repo slackapi/slack-cli --json tagName,isLatest --jq ".[] | select(.isLatest == true) | .tagName" )
-          TAG_NAME="$LATEST_RELEASE_TAG-${{ github.event.ref }}"
-          echo "Identified pre-release tagname to 🔪: $TAG_NAME"
-          # Delete the pre-release
-          GH_DEBUG=1 gh release --repo slackapi/slack-cli delete $TAG_NAME -y --cleanup-tag
+          RELEASES=$(gh release list --repo="slackapi/slack-cli" --order="desc" --json="tagName" --exclude-drafts --exclude-pre-releases --limit=24 --jq ".[] | .tagName")
+          for TAGS in $RELEASES; do
+            TAG_NAME="${TAGS}-${{ github.event.ref }}"
+            echo "Identified pre-release tagname to 🔪: $TAG_NAME"
+
+            # Delete the pre-release
+            if GH_DEBUG=1 gh release --repo="slackapi/slack-cli" delete "$TAG_NAME" -y --cleanup-tag; then
+              echo "Successfully deleted $TAG_NAME"
+              exit 0
+            else
+              echo "Failed to find $TAG_NAME, trying next..."
+            fi
+          done
+          echo "No matching pre-releases tag was found for the branch $TAG_NAME in recent versions"
+          exit 1