pages   := $(shell find . -type f -name '*.adoc')
web_dir := ./_public

# Determine whether to use podman
#
# podman currently fails when executing in GitHub actions on Ubuntu LTS 20.04,
# so we never use podman if GITHUB_ACTIONS==true.
use_podman := $(shell command -v podman 2>&1 >/dev/null; p="$$?"; \
		if [ "$${GITHUB_ACTIONS}" != "true" ]; then echo "$$p"; else echo 1; fi)

ifeq ($(use_podman),0)
	engine_cmd  ?= podman
	engine_opts ?= --rm --tty --userns=keep-id
else
	engine_cmd  ?= docker
	engine_opts ?= --rm --tty --user "$$(id -u)"
endif

# renovate: datasource=github-releases depName=vshn/antora
antora_VERSION ?= 3.1.2.3
antora_cmd  ?= $(engine_cmd) run $(engine_opts) --volume "$${PWD}":/antora ghcr.io/vshn/antora:$(antora_VERSION)

# renovate: datasource=github-releases depName=vshn/antora-preview
preview_VERSION ?= 3.1.2.3
antora_opts ?= --cache-dir=.cache/antora
preview_cmd ?= $(engine_cmd) run --rm --publish 35729:35729 --publish 2020:2020 --volume "${PWD}":/preview/antora ghcr.io/vshn/antora-preview:$(preview_VERSION) --antora=docs --style=vshn

UNAME := $(shell uname)
ifeq ($(UNAME), Linux)
	OS = linux-x64
	OPEN = xdg-open
endif
ifeq ($(UNAME), Darwin)
	OS = darwin-x64
	OPEN = open
endif

.PHONY: docs-clean
clean:
	rm -rf $(web_dir) .cache

.PHONY: docs-open
docs-open: $(web_dir)/index.html
	-$(OPEN) $<

.PHONY: docs-html
docs-html:    $(web_dir)/index.html

.PHONY: docs-preview
docs-preview:
	$(preview_cmd)

$(web_dir)/index.html: playbook.yml $(pages)
	$(antora_cmd) $(antora_opts) $<