name: Release to OBS

on:
  workflow_call:
  workflow_dispatch:

permissions:
  contents: read

jobs:
  release-obs:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
        with:
          fetch-depth: 0

      - name: Get version
        id: version
        run: |
          # Extract version by removing 'v' prefix if it exists, fallback to Cargo.toml
          if [[ $GITHUB_REF == refs/tags/* ]]; then
            VERSION=${GITHUB_REF#refs/tags/v}
          else
            # Read the binary's [package] version, not [workspace.package] (the
            # latter is the 0.x library version and comes first in Cargo.toml).
            VERSION=$(awk -F'"' '/^\[package\]/{p=1} p && /^version = /{print $2; exit}' Cargo.toml)
          fi
          echo "version=$VERSION" >> $GITHUB_OUTPUT
          echo "Version: $VERSION"

      - name: Setup Linux dependencies
        uses: ./.github/actions/setup-linux-deps

      - name: Install Rust
        uses: dtolnay/rust-toolchain@stable # unpinned: maintained branch by Rust team member
        with:
          toolchain: stable

      - name: Install OBS dependencies
        run: |
          sudo apt-get update
          sudo apt-get install -y osc obs-build build-essential

      - name: Configure OBS credentials
        run: |
          cat <<EOF > ~/.oscrc
          [general]
          apiurl = https://api.opensuse.org
          
          [https://api.opensuse.org]
          user = ${{ secrets.OBS_USER }}
          pass = ${{ secrets.OBS_PASS }}
          EOF
          chmod 600 ~/.oscrc

      - name: Download source tarball
        run: |
          VERSION="${{ steps.version.outputs.version }}"
          PACKAGE_NAME="rustnet"
          
          # Output filename must match Source0's basename (v%{version}.tar.gz)
          # so the offline OBS build can resolve it; the internal dir prefix
          # stays rustnet-%{version}/ to match %autosetup -n.
          RELEASE_TAG="v${VERSION}"
          if git rev-parse "$RELEASE_TAG" >/dev/null 2>&1; then
            echo "✓ Found release tag: $RELEASE_TAG"
            git archive --format=tar --prefix="${PACKAGE_NAME}-${VERSION}/" "$RELEASE_TAG" | gzip > "v${VERSION}.tar.gz"
          else
            echo "⚠ Release tag $RELEASE_TAG not found, using HEAD"
            git archive --format=tar --prefix="${PACKAGE_NAME}-${VERSION}/" HEAD | gzip > "v${VERSION}.tar.gz"
          fi

      - name: Vendor dependencies
        run: |
          VERSION="${{ steps.version.outputs.version }}"
          PACKAGE_NAME="rustnet"
          RELEASE_TAG="v${VERSION}"
          
          mkdir -p build-vendor
          if git rev-parse "$RELEASE_TAG" >/dev/null 2>&1; then
            git archive --format=tar "$RELEASE_TAG" | tar -x -C build-vendor
          else
            git archive --format=tar HEAD | tar -x -C build-vendor
          fi
          
          cd build-vendor
          # Capture the source-replacement config that cargo prints. The OBS
          # build has no network, so it needs this at .cargo/config.toml to
          # resolve crates from the vendored directory instead of crates.io.
          mkdir -p .cargo
          cargo vendor vendor > .cargo/config.toml

          # Clean up static libs to reduce size
          find vendor -name "*.a" -delete
          find vendor -name "*.lib" -delete

          # Bundle .cargo/config.toml alongside vendor/ so `%autosetup -a 1`
          # drops both into the source tree for the offline build.
          tar --use-compress-program="zstd -T0 -10" -cf ../vendor.tar.zst .cargo vendor
          cd ..
          rm -rf build-vendor

      - name: Prepare and push to OBS
        run: |
          VERSION="${{ steps.version.outputs.version }}"
          OBS_PROJECT="${{ secrets.OBS_PROJECT }}"
          OBS_PACKAGE="rustnet"
          
          if [ -z "$OBS_PROJECT" ]; then
            echo "::error::OBS_PROJECT secret is not set!"
            exit 1
          fi
          
          # Checkout OBS project
          osc checkout "$OBS_PROJECT" "$OBS_PACKAGE"
          cd "$OBS_PROJECT/$OBS_PACKAGE"
          
          # Clean old files
          rm -f *.tar.gz *.tar.zst *.spec
          
          # Copy new files
          cp ../../v${VERSION}.tar.gz .
          cp ../../vendor.tar.zst .
          cp ../../rpm/rustnet.spec .
          
          # Update version in spec file
          sed -i "s/^Version:.*/Version: $VERSION/" rustnet.spec

          # Prepend a changelog entry. OBS has no rpmautospec, so the spec's
          # %changelog is empty on SUSE and the changelog lives here instead.
          STAMP="$(LC_ALL=C date -u '+%a %b %e %T %Z %Y')"
          {
            printf -- '-------------------------------------------------------------------\n'
            printf '%s - %s@opensuse.org\n\n' "$STAMP" "${{ secrets.OBS_USER }}"
            printf -- '- Update to version %s\n\n' "$VERSION"
            [ -f rustnet.changes ] && cat rustnet.changes
          } > rustnet.changes.new
          mv rustnet.changes.new rustnet.changes

          # Add new files, remove deleted ones
          osc addremove
          
          # Commit to OBS
          osc commit -m "Update to version $VERSION"