# Warm sccache: Pre-populate the sccache cache for downstream Rust jobs
#
# This job runs first and compiles the project to warm up the shared
# sccache cache, ensuring better cache hit rates for parallel Rust jobs.

name: Warm sccache

on:
  workflow_call:

# Explicit minimal permissions
permissions:
  contents: read

jobs:
  warm-cache:
    name: Warm sccache cache
    runs-on:
      group: DH-runners
    env:
      RUSTC_WRAPPER: "sccache"
      CARGO_INCREMENTAL: "0"
      CARGO_TERM_COLOR: always
      SCCACHE_GHA_ENABLED: "true"
    defaults:
      run:
        working-directory: ./operator
    steps:
      - uses: actions/checkout@v4
        with:
          submodules: recursive
          fetch-depth: 1

      - uses: ./.github/workflows/actions/setup-env
        with:
          cache-key: WARM
          install-deps: false

      - name: Set build flags
        run: echo "RUSTFLAGS=${{ env.RUSTFLAGS }} -C linker=clang -C link-arg=-fuse-ld=mold" >> $GITHUB_ENV

      # Compile with release mode and superset of features to warm the cache
      # This covers: build-operator (fast-runtime) and rust-lint (try-runtime, runtime-benchmarks)
      - name: Warm cache - release build with all features
        run: |
          echo "Building release with combined features to warm sccache..."
          SKIP_WASM_BUILD=1 cargo check --release --locked --features fast-runtime,try-runtime,runtime-benchmarks

      # Also warm the debug build cache for tests
      - name: Warm cache - debug build for tests
        run: |
          echo "Building debug mode to warm sccache for tests..."
          cargo check --locked

      - name: Show sccache stats
        run: sccache --show-stats