# vim: noexpandtab:tabstop=4:shiftwidth=4

# Taken and adapted from https://github.com/riscv/riscv-isa-manual/blob/main/Makefile
# Adapted to run in Gitea Actions: https://gitea.com/gitea/act_runner/issues/189#issuecomment-812870

DOCS := central-execution-engine-spec

DOCKER_IMG_BASE := git.elyanpoujol.fr/elyan
DOCKER_IMG      := $(DOCKER_IMG_BASE)/docker-asciidoctor-wavedrom:latest 

ENV := LANG=C.utf8

OPTIONS := -D build \
           --trace \
           --failure-level=ERROR

REQUIRES := --require=asciidoctor-diagram

DOCKER_IS_ROOTLESS = \
    $(shell ! ps ux | grep -v grep | grep dockerd-rootless >/dev/null ; echo $$?)

VOLUME_LOCAL := -v $(PWD):$(PWD)
VOLUME_CI := --volumes-from=$(JOB_CONTAINER_NAME)

ifeq "$(CI)" "true"
    VOLUME := VOLUME_CI
    $(info Running in a CI environment)
else ifneq "$(DOCKER_IS_ROOTLESS)" "1"
    # Rooted Docker requires this flag so that the files it creates are
    # owned by the current user instead of root. Rootless docker does not
    # require it, and Podman doesn't either since it is always rootless.
    DOCKER_USER_ARG := --user $(shell id -u)
    SUDO_PREFIX := sudo
    VOLUME := $(VOLUME_LOCAL)
    $(info Running locally)
else
    VOLUME := $(VOLUME_LOCAL)
    $(info Running locally in rootless mode)
endif

SRC_DIR    := src
BUILD_DIR  := build
DOCKER_DIR := docker

ALL_SRC  := $(shell find $(SRC_DIR) -type f -name '*.adoc' -print)
DOCS_PDF := $(addprefix $(BUILD_DIR)/, $(addsuffix .pdf, $(DOCS)))

.PHONY: all build build-in-docker image clean

all: build

build:
	$(SUDO_PREFIX) docker run --rm $(VOLUME) $(DOCKER_USER_ARG) $(DOCKER_IMG) /bin/sh -c "cd $(PWD) && make build-in-docker"

build-in-docker: $(DOCS_PDF)

$(BUILD_DIR)/%.pdf: $(SRC_DIR)/%.adoc $(ALL_SRC)
	@echo "Building documentation in docker container..."
	rm -rf $@.workdir
	mkdir -p $@.workdir
	cp -r src $@.workdir
	$(ENV) cd $@.workdir && asciidoctor-pdf $(OPTIONS) $(REQUIRES) $<
	mv $@.workdir/$@ $@
	rm -rf $@.workdir
	@echo "Build completed."

image:
	$(SUDO_PREFIX) docker build -t $(DOCKER_IMG) $(DOCKER_DIR)

clean:
	@echo "Cleaning up generated files..."
	rm -rf $(BUILD_DIR)
	@echo "Cleanup completed."