WIP: update codegen in CI

Signed-off-by: Jason Hall <jason@chainguard.dev>

.github/workflows/codegen.yaml

@@ -0,0 +1,32 @@
+name: Update codegen
+
+on:
+  pull_request:
+    branches: [main]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+      - run: |
+          sudo apt-get update
+          sudo apt-get install -y clang llvm libbpf-dev linux-headers-generic
+
+      - run: |
+          sudo bpftool btf dump file /sys/kernel/btf/vmlinux format c > pkg/ebpf/bpf/vmlinux.h
+          go generate ./pkg/ebpf/bpf
+
+      # Check for changes. Commit and push them.
+      - run: |
+          git config --global user.name "github-actions[bot]"
+          git config --global user.email "github-actions[bot]@users.noreply.github.com"
+          if [ -n "$(git status --porcelain)" ]; then
+            git add .
+            git commit -m "Update generated code"
+            git push
+          else
+            echo "No changes to commit"
+          fi