subtracks/.github/workflows/release.yml

name: Release

on:
  push:
    tags:
      - "v*"

concurrency:
  group: release
  cancel-in-progress: false

permissions:
  contents: read

jobs:
  build:
    runs-on: ubuntu-26.04
    timeout-minutes: 60
    permissions:
      contents: read
    outputs:
      version-code: ${{ steps.build.outputs.version-code }}
    steps:
      - uses: actions/checkout@v7
        with:
          persist-credentials: false
      - name: Check tag matches versionName
        run: |
          version=$(grep -oP 'versionName = "\K[^"]+' app/build.gradle.kts)
          case "$GITHUB_REF_NAME" in
            "v$version" | "v$version"-*) ;;
            *)
              echo "tag $GITHUB_REF_NAME does not match versionName $version" >&2
              exit 1
              ;;
          esac
      - id: build
        uses: ./.github/actions/build
        with:
          gradle-args: ":app:assembleRelease :app:bundleRelease --no-daemon"
          sign: "true"
          keystore-base64: ${{ secrets.SUBTRACKS_KEYSTORE_BASE64 }}
          keyproperties-base64: ${{ secrets.SUBTRACKS_KEYPROPERTIES_BASE64 }}
          keystore-password: ${{ secrets.SUBTRACKS_UPLOAD_STORE_PASSWORD }}
          key-password: ${{ secrets.SUBTRACKS_UPLOAD_KEY_PASSWORD }}
      - name: Export release certificate
        env:
          KEYSTORE_BASE64: ${{ secrets.SUBTRACKS_KEYSTORE_BASE64 }}
          KEYPROPERTIES_BASE64: ${{ secrets.SUBTRACKS_KEYPROPERTIES_BASE64 }}
          KEYSTORE_PASSWORD: ${{ secrets.SUBTRACKS_UPLOAD_STORE_PASSWORD }}
        run: |
          umask 077
          trap 'rm -f "$RUNNER_TEMP/keystore"' EXIT
          echo "$KEYSTORE_BASE64" | base64 -d > "$RUNNER_TEMP/keystore"
          alias=$(printf '%s' "$KEYPROPERTIES_BASE64" | base64 -d | sed -n 's/^keyAlias=//p' | tr -d '\r')
          nix develop --command keytool -exportcert -rfc -keystore "$RUNNER_TEMP/keystore" -alias "$alias" -storepass "$KEYSTORE_PASSWORD" -file app/build/outputs/release-certificate.pem
      - uses: actions/upload-artifact@v7
        with:
          name: release
          path: app/build/outputs

  publish:
    needs: build
    runs-on: ubuntu-26.04
    timeout-minutes: 60
    permissions:
      contents: write
    steps:
      - uses: actions/checkout@v7
        with:
          persist-credentials: false
      - uses: actions/download-artifact@v8
        with:
          name: release
          path: dist
      - uses: ./.github/actions/nix
      - name: Detect stable tag
        id: stable
        run: |
          if [[ "$GITHUB_REF_NAME" =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
            echo "value=true" >> "$GITHUB_OUTPUT"
          else
            echo "value=false" >> "$GITHUB_OUTPUT"
          fi
      - name: Check release notes exist
        run: test -f "metadata/en-US/changelogs/${{ needs.build.outputs.version-code }}.txt"
      - name: Write Play service account
        if: steps.stable.outputs.value == 'true'
        env:
          PLAY_SERVICE_ACCOUNT_JSON: ${{ secrets.PLAY_SERVICE_ACCOUNT_JSON }}
        run: |
          umask 077
          printf '%s' "$PLAY_SERVICE_ACCOUNT_JSON" > "$RUNNER_TEMP/play.json"
      - name: Upload to Google Play
        if: steps.stable.outputs.value == 'true'
        run: |
          nix develop .#release --command fastlane supply \
            --aab dist/bundle/release/app-release.aab \
            --package_name com.subtracks \
            --track "${{ vars.PLAY_TRACK || 'internal' }}" \
            --json_key "$RUNNER_TEMP/play.json" \
            --mapping dist/mapping/release/mapping.txt
      - name: Remove Play service account
        if: always()
        run: rm -f "$RUNNER_TEMP/play.json"
      - name: Checksums and signature
        id: checksums
        run: |
          cp dist/apk/release/app-release.apk subtracks.apk
          cp dist/bundle/release/app-release.aab subtracks.aab
          gzip -n -9 -c dist/mapping/release/mapping.txt > mapping.txt.gz
          sha256sum subtracks.apk subtracks.aab > SHA256SUMS
          echo "Artifact SHA-256:"
          sha256sum subtracks.apk subtracks.aab
          echo "APK signature:"
          certs=$(nix develop --command bash -c '"$ANDROID_HOME/build-tools/37.0.0/apksigner" verify --print-certs subtracks.apk')
          printf '%s\n' "$certs"
          fingerprint=$(printf '%s\n' "$certs" | sed -n 's/.*certificate SHA-256 digest: //p' | head -1 | tr '[:lower:]' '[:upper:]' | sed 's/\(..\)/\1:/g; s/:$//')
          echo "fingerprint=$fingerprint" >> "$GITHUB_OUTPUT"
      - name: Compose release notes
        run: |
          {
            cat "metadata/en-US/changelogs/${{ needs.build.outputs.version-code }}.txt"
            echo
            echo '---'
            echo
            echo "APK SHA-256: \`$(grep 'subtracks\.apk$' SHA256SUMS | cut -d ' ' -f1)\`"
            echo
            echo "AAB SHA-256: \`$(grep 'subtracks\.aab$' SHA256SUMS | cut -d ' ' -f1)\`"
            echo
            echo "Signing certificate SHA-256: \`${{ steps.checksums.outputs.fingerprint }}\`"
            echo
            echo 'The signing certificate is attached as `release-certificate.pem`.'
            if [ "${{ steps.stable.outputs.value }}" = "true" ]; then
              echo 'The `.aab` is the exact bundle uploaded to Google Play; the `.apk` is the universal APK for sideloading.'
            else
              echo 'The `.aab` is the built app bundle (this pre-release was not uploaded to Google Play); the `.apk` is the universal APK for sideloading.'
            fi
          } > release-notes.md
      - name: Create GitHub release
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          args=(--verify-tag --title "$GITHUB_REF_NAME" --notes-file release-notes.md)
          if [ "${{ steps.stable.outputs.value }}" != "true" ]; then
            args+=(--prerelease)
          fi
          gh release create "$GITHUB_REF_NAME" subtracks.apk subtracks.aab SHA256SUMS dist/release-certificate.pem mapping.txt.gz "${args[@]}"