rust.yml

name: Rust CI
on:
  workflow_call:
  workflow_dispatch:
  # Run periodically to check for breakage, since we seldom update the osiris repo.
  # This allows us to determine approximately when a breaking change was merged into
  # the penumbra repo, so we can fix it ahead of a testnet release.
  schedule:
    - cron: "25 18 * * *"
  pull_request: {}
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  lookup-testnet:
    name: Look up testnet
    runs-on: ubuntu-latest
    outputs:
      testnet_tag: ${{ steps.testnet_tag.outputs.testnet_tag }}
    steps:
      - id: testnet_tag
        run: >-
          printf "testnet_tag=%s" "$(curl -sSfL https://api.github.com/repos/penumbra-zone/penumbra/releases/latest | jq -r .tag_name)"
          >> "$GITHUB_OUTPUT"

  # Let's make sure we can still build against the currently active stable testnet.
  check-testnet:
    name: Check Testnet
    runs-on: buildjet-8vcpu-ubuntu-2004
    needs: lookup-testnet
    steps:
      - name: Checkout osiris
        uses: actions/checkout@v4

      - name: Check out penumbra repo
        uses: actions/checkout@v4
        with:
          repository: penumbra-zone/penumbra
          path: penumbra-repo
          lfs: true
          ref: ${{needs.lookup-testnet.outputs.testnet_tag}}

      - name: Move penumbra repo to relative path
        run: mv penumbra-repo ../penumbra

      - name: Install rust toolchain
        uses: dtolnay/rust-toolchain@stable

      - name: Configure rust cache
        uses: Swatinem/rust-cache@v2

      - name: Run cargo check
        run: cargo check --release

  build-preview:
    name: Build Preview
    runs-on: buildjet-16vcpu-ubuntu-2004
    steps:
      - name: Checkout osiris
        uses: actions/checkout@v4

      - name: Check out penumbra repo
        uses: actions/checkout@v4
        with:
          repository: penumbra-zone/penumbra
          path: penumbra-repo
          lfs: true
          ref: main

      - name: Move penumbra repo to relative path
        run: mv penumbra-repo ../penumbra

      - name: Install rust toolchain
        uses: dtolnay/rust-toolchain@stable

      - name: Configure rust cache
        uses: Swatinem/rust-cache@v2

      - name: Run cargo build release
        run: cargo build --release
        env:
          # The `-D warnings` option causes an error on warnings;
          # we must duplicate the rustflags from penumbra repo's `.cargo/config.toml`.
          RUSTFLAGS: "-D warnings --cfg tokio_unstable"

  fmt:
    name: Rustfmt
    runs-on: buildjet-8vcpu-ubuntu-2004
    steps:
      - name: Checkout osiris
        uses: actions/checkout@v4

      # N.B. `cargo fmt` does not require relpath dependencies to be present,
      # so we don't need to clone the penumbra repo here.

      - name: Install rust toolchain
        uses: dtolnay/rust-toolchain@stable

      - name: Configure rust cache
        uses: Swatinem/rust-cache@v2

      - name: Run cargo fmt
        run: cargo fmt --all -- --check