name: Parse rust-version from libservo
description: "Parse rust-version from libservo. Requires cargo-metadata."
outputs:
  rust_version:
    description: "Minimum rust-version defined by libservo"
    value: ${{ steps.parse_version.outputs.LIBSERVO_RUST_VERSION }}

runs:
  using: "composite"
  steps:
    - name: Parse libservo version
      id: parse_version
      shell: bash
      run:  |
        msrv=$(cargo metadata --no-deps --format-version 1 | jq -r '.packages[] | select(.name == "libservo") | .rust_version')
        if [[ "${msrv}" == "null" ]]; then
          echo "Failed to determine MSRV of libservo"
          exit 1
        fi
        echo "libservo has a minimum supported Rust version of ${msrv}."
        echo "LIBSERVO_RUST_VERSION=${msrv}" >> "$GITHUB_OUTPUT"