cleanup-snapshot.yml

name: Clean up PR snapshot

on:
  pull_request:
    types: [closed]

jobs:
  cleanup-snapshot:
    name: Delete PR snapshot from GitHub Packages
    runs-on: ubuntu-latest
    # Only run when the PR was actually merged, not just closed.
    if: github.event.pull_request.merged == true
    permissions:
      contents: read
      packages: write

    steps:
      - name: Checkout
        uses: actions/checkout@v6

      - name: Get base version
        id: get-version
        run: |
          BASE_VERSION=$(grep -iE "version([ ]*)=" gradle.properties | cut -f 2 -d "=" | tr -d '[:space:]')
          # Strip any existing -SNAPSHOT suffix so we can re-apply it cleanly
          BASE_VERSION="${BASE_VERSION%-SNAPSHOT}"
          echo "base_version=${BASE_VERSION}" >> $GITHUB_OUTPUT

      - name: Delete PR snapshot from GitHub Packages
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          set -euo pipefail

          PACKAGE_NAME="com.uploadcare.uploadcare"
          SNAPSHOT_VERSION="${{ steps.get-version.outputs.base_version }}-PR-${{ github.event.pull_request.number }}-SNAPSHOT"
          echo "Looking for package version: ${SNAPSHOT_VERSION}"

          # Fetch ALL versions so we can detect whether the snapshot is the last remaining version.
          ALL_VERSION_IDS=$(gh api \
            --paginate \
            -H "Accept: application/vnd.github+json" \
            "/orgs/${{ github.repository_owner }}/packages/maven/${PACKAGE_NAME}/versions" \
            --jq ".[].id" 2>/dev/null || true)

          # Retrieve the numeric ID(s) of any published version matching this snapshot.
          VERSION_IDS=$(gh api \
            --paginate \
            -H "Accept: application/vnd.github+json" \
            "/orgs/${{ github.repository_owner }}/packages/maven/${PACKAGE_NAME}/versions" \
            --jq ".[] | select(.name == \"${SNAPSHOT_VERSION}\") | .id" 2>/dev/null || true)

          if [ -z "${VERSION_IDS}" ]; then
            echo "No published version found for ${SNAPSHOT_VERSION} — nothing to delete."
            exit 0
          fi

          TOTAL_VERSIONS=$(printf "%s\n" "${ALL_VERSION_IDS}" | sed '/^$/d' | wc -l | tr -d ' ')
          echo "Total versions in package ${PACKAGE_NAME}: ${TOTAL_VERSIONS}"

          # GitHub Packages does not allow deleting the LAST version of a package (HTTP 400).
          # If this is the last remaining version, delete the whole package instead.
          if [ "${TOTAL_VERSIONS}" -le 1 ]; then
            echo "Snapshot is the last version; deleting the whole package ${PACKAGE_NAME} …"
            gh api --method DELETE \
              -H "Accept: application/vnd.github+json" \
              "/orgs/${{ github.repository_owner }}/packages/maven/${PACKAGE_NAME}"
            echo "Deleted package ${PACKAGE_NAME}."
            exit 0
          fi

          while IFS= read -r VERSION_ID; do
            [ -z "${VERSION_ID}" ] && continue
            echo "Deleting version ID ${VERSION_ID} (${SNAPSHOT_VERSION}) …"
            gh api --method DELETE \
              -H "Accept: application/vnd.github+json" \
              "/orgs/${{ github.repository_owner }}/packages/maven/${PACKAGE_NAME}/versions/${VERSION_ID}"
            echo "Deleted version ID ${VERSION_ID}."
          done <<< "${VERSION_IDS}"

          echo "Done cleaning up ${SNAPSHOT_VERSION}."