include build-aux/tools.mk
include build-aux/var.mk

#
# Utility rules

# Assume that any rule ending with '.clean' is phony.
.PHONY: %.clean

# Also provide a basic *.clean implementation... well, it'd be.  But
# because of what I'm convinced is a bug in Make, it is confusing this
# %.clean rule with the %.docker.clean rule.  So I named this one
# `%.rm`.  But I'd have liked to name it `%.clean`.
%.rm:
	rm -f $*
.PHONY: %.rm
%.rm-r:
	rm -rf $*
.PHONY: %.rm-r

# For files that should only-maybe update when the rule runs, put ".stamp" on
# the left-side of the ":", and just go ahead and update it within the rule.
#
# ".stamp" should NEVER appear in a dependency list (that is, it
# should never be on the right-side of the ":"), save for in this rule
# itself.
%: %.stamp $(tools/copy-ifchanged)
	@$(tools/copy-ifchanged) $< $@
docker/%: docker/.%.stamp $(tools/copy-ifchanged)
	$(tools/copy-ifchanged) $< $@

# Load ocibuild files in to dockerd.
_ocibuild-images  = base
_ocibuild-images += kat-client
_ocibuild-images += kat-server
$(foreach img,$(_ocibuild-images),docker/.$(img).docker.stamp): docker/.%.docker.stamp: docker/%.img.tar
	docker load < $<
	docker inspect $$(bsdtar xfO $< manifest.json|jq -r '.[0].RepoTags[0]') --format='{{.Id}}' > $@
clean: $(foreach img,$(_ocibuild-images),docker/$(img).img.tar.clean)

%.img.tar.clean: %.docker.clean
	rm -f $*.img.tar $(*D)/.$(*F).img.tar.stamp $(*D)/$(*F).*.layer.tar

#
# Specific rules

# For images we can either write rules for
#  - `docker/.NAME.img.tar.stamp` for ocibuild-oriented images, or
#  - `docker/.NAME.docker.stamp` for `docker build`-oriented images.
#
# Note that there are a few images used by the test suite that are
# defined in check.mk, rather than here.

# base: Base OS; none of our specific stuff.  Used for auxiliar test images
# that don't need Emissary-specific stuff.
docker/.base.img.tar.stamp: FORCE $(tools/crane) docker/base-python/Dockerfile
	$(tools/crane) pull $(shell gawk '$$1 == "FROM" { print $$2; quit; }' < docker/base-python/Dockerfile) $@ || test -e $@
clobber: docker/base.img.tar.clean

# base-python: Base OS, plus some Emissary-specific setup of
# low-level/expensive pieces of the Python environment.  This does NOT
# include the packages installed by `requirements.txt`.
#
# At the moment, it also includes some other stuff too (kubectl...),
# but including those things at such an early stage should be
# understood to be debt from a previous build system, and not
# something we're actually happy with.
#
# In the long-run, this will likely always be a `docker build` rather
# than an `ocibuild`, in order to do truly base-OS-specific setup
# (`apk add`, libc-specific compilation...).
docker/.base-python.docker.stamp: FORCE docker/base-python/Dockerfile docker/base-python.docker.gen
	docker/base-python.docker.gen >$@
clobber: docker/base-python.docker.clean

# base-pip: base-python, but with requirements.txt installed.
#
# Mixed feelings about this one; it kinda wants to not be a separate
# image and just be part of the main emissary Dockerfile.  But that
# would create problems for generate.mk's `pip freeze` step.  Perhaps
# it will get to go away with `ocibuild`.
#
# TODO(lukeshu): Figure out a `py-list-deps`-based workflow for
# updating requirements-dev.txt.
#python/requirements-dev.txt: $(tools/py-list-deps) $(tools/write-ifchanged) FORCE
#	$(tools/py-list-deps) --include-dev python/ | $(tools/write-ifchanged) $@
python/requirements.in: $(tools/py-list-deps) $(tools/write-ifchanged) FORCE
	set -o pipefail; $(tools/py-list-deps) --no-include-dev python/ | $(tools/write-ifchanged) $@
clean: python/requirements.in.rm
python/.requirements.txt.stamp: python/requirements.in docker/base-python.docker.tag.local
# The --interactive is so that stdin gets passed through; otherwise Docker closes stdin.
	set -ex -o pipefail; { \
	  docker run --platform="$(BUILD_ARCH)" --rm --interactive "$$(cat docker/base-python.docker)" sh -c 'tar xf - && pip-compile --allow-unsafe -q >&2 && cat requirements.txt' \
	    < <(bsdtar -cf - -C $(@D) requirements.in requirements.txt) \
	    > $@; }
clean: python/.requirements.txt.stamp.rm
python/requirements.txt: python/%: python/.%.stamp $(tools/copy-ifchanged)
	$(tools/copy-ifchanged) $< $@
.PRECIOUS: python/requirements.txt
docker/base-pip/requirements.txt: python/requirements.txt $(tools/copy-ifchanged)
	$(tools/copy-ifchanged) $< $@
clean: docker/base-pip/requirements.txt.rm
docker/.base-pip.docker.stamp: docker/.%.docker.stamp: docker/%/Dockerfile docker/%/requirements.txt docker/base-python.docker.tag.local
	docker build --platform="$(BUILD_ARCH)" --build-arg=from="$$(sed -n 2p docker/base-python.docker.tag.local)" --iidfile=$@ $(<D)
clobber: docker/base-pip.docker.clean

# The Helm chart
build-output/chart-%.d: \
  $(shell find charts/emissary-ingress) \
  $(var.)DEV_REGISTRY $(var.)RELEASE_REGISTRY \
  $(tools/chart-doc-gen)
ifeq ($(CI),)
	rm -rf $@
else
	@if test -d $@; then \
	  echo 'This should not happen in CI: $@ should not need to change' >&2; \
	  echo 'Files triggering the change are: $?' >&2; \
	  exit 1; \
	fi
endif
	mkdir -p $(@D)
	cp -a $< $@
	@PS4=; set -ex -o pipefail; { \
	  if [[ '$(word 1,$(subst _, ,$*))' =~ ^[0-9]+\.[0-9]+\.[0-9]+(-rc\.[0-9]+|-ea)?$$ ]]; then \
	    registry=$(RELEASE_REGISTRY); \
	  else \
	    registry=$(DEV_REGISTRY); \
	  fi; \
	  for file in Chart.yaml values.yaml; do \
	    sed \
	      -e 's/@version@/$(word 1,$(subst _, ,$*))/g' \
	      -e 's/@chartVersion@/$(word 2,$(subst _, ,$*))/g' \
	      -e "s,@imageRepo@,$${registry}/emissary,g" \
	      <'$<'/"$${file}.in" \
	      >'$@'/"$${file}"; \
	  done; \
	}
	$(tools/chart-doc-gen) -d $</doc.yaml -t $</readme.tpl -v $@/values.yaml >$@/README.md
build-output/chart-%.tgz: build-output/chart-%.d
	helm package --destination=$< $<
	mv $</emissary-ingress-$(word 2,$(subst _, ,$*)).tgz $@

# Convenience aliases for the Helm chart
chart_dir = build-output/chart-$(patsubst v%,%,$(VERSION))_$(patsubst v%,%,$(CHART_VERSION)).d
chart_tgz = $(patsubst %.d,%.tgz,$(chart_dir))
chart: $(chart_tgz)
PHONY: chart

_major_version = $(firstword $(subst ., ,$(patsubst v%,%,$(VERSION))))
_chart_major_version = $(firstword $(subst ., ,$(patsubst v%,%,$(CHART_VERSION))))
boguschart_dir = build-output/chart-$(_major_version).0.0-bogus_$(_chart_major_version).0.0-bogus.d
boguschart_tgz = $(patsubst %.d,%.tgz,$(boguschart_dir))

# YAML manifests
build-output/yaml-%: $(shell find $(CURDIR)/manifests/emissary -type d -o -name '*.yaml.in') $(var.)DEV_REGISTRY $(var.)RELEASE_REGISTRY
ifeq ($(CI),)
	rm -rf $@
else
	@if test -d $@; then \
	  echo 'This should not happen in CI: $@ should not need to change' >&2; \
	  echo 'Files triggering the change are: $?' >&2; \
	  exit 1; \
	fi
endif
	mkdir -p $@
	$(foreach src,$(filter %.yaml.in,$^),$(foreach dst,$(patsubst $(CURDIR)/manifests/emissary/%.yaml.in,$@/%.yaml,$(src)),\
	  { \
	    if [[ '$*' =~ ^[0-9]+\.[0-9]+\.[0-9]+(-rc\.[0-9]+|-ea)?$$ ]]; then \
	      registry=$(RELEASE_REGISTRY); \
	    else \
	      registry=$(DEV_REGISTRY); \
	    fi; \
	    sed -e 's/\$$version\$$/$*/g' -e 's,\$$imageRepo\$$,'"$${registry}"'/emissary,g' <$(src) >$(dst); \
	  }$(NL)))

build-output/docs-yaml-%: $(shell find docs/yaml)
ifeq ($(CI),)
	rm -rf $@
else
	@if test -d $@; then \
	  echo 'This should not happen in CI: $@ should not need to change' >&2; \
	  echo 'Files triggering the change are: $?' >&2; \
	  exit 1; \
	fi
endif
	$(foreach src,$(filter %.yaml,$^),$(foreach dst,$(patsubst docs/yaml/%,$@/%,$(src)),\
	  mkdir -p $(dir $(dst))$(NL)\
	  sed -e 's/\$$version\$$/$*/g' -e 's/\$$quoteVersion$$/0.4.1/g' <$(src) >$(dst)$(NL)))

#
# Destructive rules

clobber: clean

clean: build-output.rm-r

python.clean releng.clean: %.clean: python/ambassador.egg-info.rm-r
	find $* -name __pycache__ -exec rm -rf -- {} +
clean: python.clean releng.clean

cmd.clean pkg.clean: %.clean:
	find $* -name '*.yaml.o' -delete
clean: cmd.clean pkg.clean