name: Rust

on:
    pull_request:

jobs:
    clippy & fmt:
        runs-on: alpine
        container: rust:alpine
        env:
            CARGO_HOME: ${{ github.workspace }}/.cargo

        steps:
            - name: Install node for actions
              run: |
                  apk add --no-cache nodejs git

            - name: Install rust components
              run: |
                  rustup component add clippy rustfmt
                  cargo clippy --version
                  rustfmt --version

            - name: Checkout
              uses: actions/checkout@v4

            - name: Cache cargo packages
              uses: actions/cache@v4
              with:
                  path: |
                      .cargo/registry
                      .cargo/git
                      target
                  key: rust-build-${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
                  restore-keys: |
                      rust-${{ runner.os }}-cargo-

            - name: Clippy (with compile check)
              run: |
                  manifests=$(find . \( -name .cargo -o -name .git -o -name target \) -prune -o -name Cargo.toml -print)
                  if [ -z "$manifests" ]; then
                    if [ -n "$(find . \( -name .cargo -o -name target \) -prune -o -name '*.rs' -print -quit)" ]; then
                      echo "Rust files found but no Cargo.toml"
                      exit 1
                    fi
                    echo "No Rust project found"
                    exit 0
                  fi
                  status=0
                  for manifest in $manifests; do
                    if (cd "$(dirname "$manifest")" && cargo clippy --all-targets --locked -- -D warnings); then
                      echo "$manifest: Clippy passed"
                    else
                      echo "$manifest: Clippy failed"
                      status=1
                    fi
                  done
                  exit $status

            - name: Format check
              run: |
                  manifests=$(find . \( -name .cargo -o -name .git -o -name target \) -prune -o -name Cargo.toml -print)
                  if [ -z "$manifests" ]; then
                    if [ -n "$(find . \( -name .cargo -o -name target \) -prune -o -name '*.rs' -print -quit)" ]; then
                      echo "Rust files found but no Cargo.toml"
                      exit 1
                    fi
                    echo "No Rust project found"
                    exit 0
                  fi
                  status=0
                  for manifest in $manifests; do
                    if (cd "$(dirname "$manifest")" && cargo fmt --check); then
                      echo "$manifest: formatting OK"
                    else
                      echo "$manifest: needs formatting"
                      status=1
                    fi
                  done
                  exit $status