Makefile

IMAGE    := micro-containers
WASM_IMG := micro-containers-wasm
PORT     := 8080

.PHONY: build build-wasm \
        run-distroless run-gvisor run-kata run-firecracker run-wasm \
        bench bench-md bench-fast \
        check health sizes clean

# ── Build ──────────────────────────────────────────────────────────────────

build:
	docker build -t $(IMAGE) .

build-wasm:
	docker build -f runtimes/wasm/Dockerfile -t $(WASM_IMG) .

# ── Run (each target opens the server on :PORT) ────────────────────────────

run-distroless: build
	IMAGE=$(IMAGE) PORT=$(PORT) bash runtimes/distroless/run.sh

run-gvisor: build
	IMAGE=$(IMAGE) PORT=$(PORT) bash runtimes/gvisor/run.sh

run-kata: build
	IMAGE=$(IMAGE) PORT=$(PORT) bash runtimes/kata/run.sh

run-firecracker: build
	IMAGE=$(IMAGE) PORT=$(PORT) bash runtimes/firecracker/run.sh

run-wasm: build-wasm
	WASM_IMAGE=$(WASM_IMG) bash runtimes/wasm/run.sh

# ── Benchmark (verify + capture performance) ──────────────────────────────

# Full benchmark: builds images, runs all available runtimes, writes bench/results.json
bench:
	go run -buildvcs=false ./bench/

# Same but also prints a Markdown table (paste directly into the article)
bench-md:
	go run -buildvcs=false ./bench/ -md

# Quick smoke-test: 20 samples, 5 warmup (builds images if needed)
bench-fast:
	go run -buildvcs=false ./bench/ -samples=20 -warmup=5

# ── Introspection ──────────────────────────────────────────────────────────

# Check which runtimes are available on this machine
check:
	@echo "=== Runtime availability ==="; \
	docker version --format 'Docker {{.Server.Version}}' 2>/dev/null \
	  && echo "  runc:             OK (default)" \
	  || echo "  Docker:           NOT FOUND"; \
	docker info 2>/dev/null | grep -q '"runsc"' \
	  && echo "  gVisor (runsc):   OK" \
	  || echo "  gVisor (runsc):   not registered  → runtimes/gvisor/install.sh"; \
	docker info 2>/dev/null | grep -q '"kata-runtime"' \
	  && echo "  Kata (QEMU):      OK" \
	  || echo "  Kata (QEMU):      not registered  → runtimes/kata/install.sh"; \
	docker info 2>/dev/null | grep -q '"kata-fc"' \
	  && echo "  Kata (FC):        OK" \
	  || echo "  Kata (FC):        not registered  → runtimes/firecracker/install.sh"; \
	[ -c /dev/kvm ] \
	  && echo "  KVM (/dev/kvm):   OK" \
	  || echo "  KVM (/dev/kvm):   NOT available   (required for Kata/Firecracker)"; \
	command -v wasmtime &>/dev/null \
	  && echo "  wasmtime:         OK ($(wasmtime --version))" \
	  || echo "  wasmtime:         not found       → runtimes/wasm/install.sh"; \
	command -v wasmedge &>/dev/null \
	  && echo "  wasmedge:         OK" \
	  || echo "  wasmedge:         not found"

# Probe the running container
health:
	@curl -sf http://localhost:$(PORT)/health | python3 -m json.tool \
	  || echo "Nothing listening on :$(PORT)"

# ── Sizes ─────────────────────────────────────────────────────────────────

sizes: build build-wasm
	@echo "=== Image sizes ==="; \
	docker images --format "{{.Repository}}:{{.Tag}}\t{{.Size}}" \
	  | grep -E "$(IMAGE)|$(WASM_IMG)"

# ── Cleanup ───────────────────────────────────────────────────────────────

clean:
	docker rmi -f $(IMAGE) $(WASM_IMG) 2>/dev/null || true