# infra/build-machines/Makefile
# Usage: make remote-build PROJECT=~/projects/my-haskell-app [VM=haskell-build]

VM      ?= haskell-build
PROJECT ?= .
RDIR    := /build/$(notdir $(realpath $(PROJECT)))

# Sync project source to VM (exclude build artefacts)
.PHONY: sync
sync:
	rsync -av --delete \
	  --exclude='.git' \
	  --exclude='dist-newstyle' \
	  --exclude='.stack-work' \
	  --exclude='*.o' --exclude='*.hi' \
	  $(PROJECT)/ $(VM):$(RDIR)/

# Run cabal build on VM after sync
.PHONY: remote-build
remote-build: sync
	ssh $(VM) "cd $(RDIR) && source ~/.ghcup/env && cabal build all 2>&1"

# Run tests on VM
.PHONY: remote-test
remote-test: sync
	ssh $(VM) "cd $(RDIR) && source ~/.ghcup/env && cabal test all 2>&1"

# Open a GHCi session on the VM
.PHONY: remote-ghci
remote-ghci: sync
	ssh -t $(VM) "cd $(RDIR) && source ~/.ghcup/env && cabal repl"

# Sync build artefacts back (for local IDE inspection)
.PHONY: fetch-artifacts
fetch-artifacts:
	rsync -av $(VM):$(RDIR)/dist-newstyle/ $(PROJECT)/dist-newstyle/

# Check which VMs are reachable
.PHONY: bridge-status
bridge-status:
	@echo "Scanning build-machine tunnel ports..."
	@for port in 12221 12222 12223 12224 12225; do \
	  result=$$(ssh -q -p $$port -o ConnectTimeout=2 \
	    -o StrictHostKeyChecking=no build@localhost \
	    "echo $$port OK: $$(hostname) — GHC: $$(~/.ghcup/bin/ghc --numeric-version)" \
	    2>/dev/null) ; \
	  if [ -n "$$result" ]; then echo "  $$result"; \
	  else echo "  port $$port: no tunnel"; fi; \
	done

# Show VM system info
.PHONY: vm-info
vm-info:
	ssh $(VM) "uname -a; source ~/.ghcup/env && ghc --version && cabal --version"

# Install SSH config for the build VM (idempotent)
.PHONY: install-ssh-config
install-ssh-config:
	@if grep -q '# Haskell Build VM — tunnel via workstation' ~/.ssh/config 2>/dev/null; then \
	  echo "SSH config already present — skipping"; \
	else \
	  echo "" >> ~/.ssh/config; \
	  cat ssh-config.template >> ~/.ssh/config; \
	  echo "Appended build-machine SSH config to ~/.ssh/config"; \
	fi