rust.yml

name: Rust

on:
  push:
    branches: [ "main" ]
  pull_request:
    branches: [ "main" ]

env:
  CARGO_TERM_COLOR: always

jobs:
  build:
    runs-on: ubuntu-24.04

    steps:
    - uses: actions/checkout@v4

    - name: Install dependencies
      run: |
        sudo apt-get update
        sudo apt-get install -y \
          clang \
          llvm \
          libelf-dev \
          linux-tools-common \
          linux-tools-generic \
          libbpf-dev \
          linux-headers-$(uname -r)

    - name: Setup bpftool
      run: |
        # Link bpftool from linux-tools
        sudo ln -sf /usr/lib/linux-tools/*/bpftool /usr/local/bin/bpftool || true
        bpftool version

    - name: Generate vmlinux.h if BTF not available
      run: |
        # Check if BTF is available on the runner
        if [ ! -f /sys/kernel/btf/vmlinux ]; then
          echo "BTF not available, downloading pre-generated vmlinux.h..."
          mkdir -p src/bpf
          # Use vmlinux.h from libbpf-bootstrap (covers common kernel structures)
          curl -sL https://raw.githubusercontent.com/libbpf/libbpf-bootstrap/master/vmlinux/vmlinux_608.h -o src/bpf/vmlinux.h
          echo "Downloaded vmlinux.h"
        else
          echo "BTF available at /sys/kernel/btf/vmlinux"
        fi

    - name: Setup Rust
      uses: dtolnay/rust-toolchain@stable

    - name: Build
      run: |
        # If vmlinux.h was pre-generated, skip btf_dump in build.rs
        if [ -f src/bpf/vmlinux.h ]; then
          export SKIP_BTF_DUMP=1
        fi
        cargo build --verbose

    - name: Run tests
      run: cargo test --verbose