KUSTOMIZE = docker run -v $(HOME)/.aws:/root/.aws:ro -v $(PWD):/host:ro -w /host badjware/kustomize-plugins:latest
KUSTOMIZEFLAGS = --enable_alpha_plugins

KUBECTL = kubectl
KUBECTLFLAGS = 
KUBECTLDIFFFLAGS = --server-side
KUBECTLAPPLYFLAGS = -l managed-by=kustomize --prune

SRC := $(shell find kustomize/ -type f)
OUTDIR = build

ifeq ($(environment),prod)
	# prod
	KUSTOMIZEDIR = kustomize/environment/prod
	KUSTOMIZEOUT = $(OUTDIR)/prod/out.yaml
else
	# dev
	environment = dev
	KUBECTLFLAGS += --kubeconfig kubectl/kubeconfig.yaml
	KUSTOMIZEDIR = kustomize/environment/dev
	KUSTOMIZEOUT = $(OUTDIR)/dev/out.yaml
endif

.PHONY: info clean diff apply

all: info $(KUSTOMIZEOUT)

info:
	@echo "Building for" $(environment)

clean:
	rm -r $(OUTDIR)

$(KUSTOMIZEOUT): $(SRC)
	@mkdir -p $(dir $(KUSTOMIZEOUT))
	$(KUSTOMIZE) build $(KUSTOMIZEFLAGS) $(KUSTOMIZEDIR) >$(KUSTOMIZEOUT) || rm $(KUSTOMIZEOUT)

diff: $(KUSTOMIZEOUT)
	$(KUBECTL) $(KUBECTLFLAGS) diff $(KUBECTLDIFFFLAGS) -f $(KUSTOMIZEOUT)

apply: $(KUSTOMIZEOUT)
	$(KUBECTL) $(KUBECTLFLAGS) apply $(KUBECTLAPPLYFLAGS) -f $(KUSTOMIZEOUT)