cache-factory.yml

# This workflow _produces_ caches which are used to speed up pull request builds.
# The caches are split by Rust version (stable vs MSRV per crate) because those caches cannot share any artifacts.

name: Cache factory

on:
  push:
    branches:
      - master # Caches are only created on master branch.

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  gather_msrv_versions:
    runs-on: ubuntu-latest
    outputs:
      versions: ${{ steps.find-rust-versions.outputs.versions }}
    steps:
      - uses: actions/checkout@v3

      - id: find-rust-versions
        run: |
          RUST_VERSIONS=$(cargo metadata --format-version=1 --no-deps | jq -c '.packages | map(.rust_version) | unique | del(..|nulls)')
          echo "versions=${RUST_VERSIONS}" >> $GITHUB_OUTPUT

  make_msrv_cache:
    runs-on: ubuntu-latest
    needs: gather_msrv_versions
    strategy:
      fail-fast: false
      matrix:
        rust: ${{ fromJSON(needs.gather_msrv_versions.outputs.versions) }}
    steps:
      - uses: actions/checkout@v3

      - uses: dtolnay/rust-toolchain@master
        with:
          toolchain: ${{ matrix.rust }}

      - uses: Swatinem/rust-cache@6fd3edff6979b79f87531400ad694fb7f2c84b1f # v2.2.1
        with:
          shared-key: msrv-cache

      - name: Compile all crates which have MSRV ${{ matrix.rust }}
        run: |
          cargo metadata --format-version=1 --no-deps | \
          jq -r '.packages[] | select(.rust_version == "${{ matrix.rust }}") | "+\(.rust_version) build --all-features --package \(.name)"' |
          xargs --verbose -L 1 cargo

  make_stable_rust_cache:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3

      - uses: dtolnay/rust-toolchain@stable

      - uses: Swatinem/rust-cache@6fd3edff6979b79f87531400ad694fb7f2c84b1f # v2.2.1
        with:
          shared-key: stable-cache

      - name: Compile workspace with stable Rust
        run: cargo test --all-features --all-targets --workspace --no-run