EPOCH_TEST_COMMIT := 78e6667ae2d67aad100b28ee9580b41b7a24e667
OUTPUT_DIRNAME    ?= output
DOC_FILENAME      ?= oci-runtime-spec
DOCKER            ?= $(shell command -v docker 2>/dev/null)
PANDOC            ?= $(shell command -v pandoc 2>/dev/null)
PANDOC_IMAGE      ?= ghcr.io/opencontainers/pandoc:2.9.2.1-9.fc34.x86_64@sha256:590c5c7aaa6e8e7a4debae7e9102c837daa0c8a76f8f5b5c9831ea5f755e3e95
ifeq "$(strip $(PANDOC))" ''
	ifneq "$(strip $(DOCKER))" ''
		PANDOC = $(DOCKER) run \
			--security-opt label=disable \
			--rm \
			-v $(shell pwd)/:/input/:ro \
			-v $(shell pwd)/$(OUTPUT_DIRNAME)/:/$(OUTPUT_DIRNAME)/ \
			-u $(shell id -u) \
			$(PANDOC_IMAGE)
		PANDOC_SRC := /input/
		PANDOC_DST := /
	endif
endif

# These docs are in an order that determines how they show up in the PDF/HTML docs.
DOC_FILES := \
	version.md \
	spec.md \
	principles.md \
	bundle.md \
	runtime.md \
	runtime-linux.md \
	config.md \
	config-linux.md \
	config-solaris.md \
	features.md \
	features-linux.md \
	glossary.md

default: docs

docs: $(OUTPUT_DIRNAME)/$(DOC_FILENAME).pdf $(OUTPUT_DIRNAME)/$(DOC_FILENAME).html

ifeq "$(strip $(PANDOC))" ''
$(OUTPUT_DIRNAME)/$(DOC_FILENAME).pdf $(OUTPUT_DIRNAME)/$(DOC_FILENAME).html:
	$(error cannot build $@ without either pandoc or docker)
else
$(OUTPUT_DIRNAME)/$(DOC_FILENAME).pdf: $(DOC_FILES)
	mkdir -p $(OUTPUT_DIRNAME)/ && \
	$(PANDOC) -f markdown_github -t latex -o $(PANDOC_DST)$@ $(patsubst %,$(PANDOC_SRC)%,$(DOC_FILES))

$(OUTPUT_DIRNAME)/$(DOC_FILENAME).html: $(DOC_FILES)
	mkdir -p $(OUTPUT_DIRNAME)/ && \
	$(PANDOC) -f markdown_github -t html5 -o $(PANDOC_DST)$@ $(patsubst %,$(PANDOC_SRC)%,$(DOC_FILES))
endif

version.md: ./specs-go/version.go
	go run ./.tool/version-doc.go > $@

HOST_GOLANG_VERSION	= $(shell go version | cut -d ' ' -f3 | cut -c 3-)
# this variable is used like a function. First arg is the minimum version, Second arg is the version to be checked.
ALLOWED_GO_VERSION	= $(shell test '$(shell /bin/echo -e "$(1)\n$(2)" | sort -V | head -n1)' = '$(1)' && echo 'true')

test: .govet .golint .gitvalidation

.govet:
	go vet -x ./...

# When this is running in GitHub, it will only check the GitHub commit range
.gitvalidation:
	@which git-validation > /dev/null 2>/dev/null || (echo "ERROR: git-validation not found. Consider 'make install.tools' target" && false)
ifdef GITHUB_SHA
	git-validation -q -run DCO,short-subject,dangling-whitespace -range $(GITHUB_SHA)..HEAD
else
	git-validation -v -run DCO,short-subject,dangling-whitespace -range $(EPOCH_TEST_COMMIT)..HEAD
endif

install.tools: .install.gitvalidation

.install.gitvalidation:
	go install github.com/vbatts/git-validation@v1.2.0

clean:
	rm -rf $(OUTPUT_DIRNAME) *~
	rm -f version.md