# SPDX-License-Identifier: LGPL-3.0-or-later
#
# SPDX-FileCopyrightText: 2023 Glenn Y. Rolland <glenux@glenux.net>
# Copyright © 2023 Glenn Y. Rolland <glenux@glenux.net>

##
## PLANTUML MODULE
##

##
## External variables (API)
##
PLANTUML_SUFFIX ?= uml
PLANTUML_SRC_DIR ?=
PLANTUML_DEST_DIR ?=
PLANTUML_PLANTUML_COMMAND ?= podman run -i plantuml/plantuml plantuml
PLANTUML_RSVGCONVERT_COMMAND ?= rsvg-convert
PLANTUML_GHOSTSCRIPT_COMMAND ?= gs

##
## Internal variables (lazy recursive evaluation)
##

## Find .uml files
PLANTUML_UML = $(shell find $(PLANTUML_SRC_DIR) \( -name '*.uml' ! -name '_*' \))
PLANTUML_UML_PNG = $(patsubst $(PLANTUML_SRC_DIR)/%.uml,$(PLANTUML_DEST_DIR)/%.uml.png,$(PLANTUML_UML))
PLANTUML_UML_SVG = $(patsubst $(PLANTUML_SRC_DIR)/%.uml,$(PLANTUML_DEST_DIR)/%.uml.svg,$(PLANTUML_UML))
PLANTUML_UML_PDF = $(patsubst $(PLANTUML_SRC_DIR)/%.uml,$(PLANTUML_DEST_DIR)/%.uml.pdf,$(PLANTUML_UML))

##
## Prerequisistes (system packages)
##
GRAPHVIZ_APT_PACKAGES := plantuml librsvg2-bin ghostscript

##
## Rules
##

$(PLANTUML_DEST_DIR):
	mkdir -p $(PLANTUML_DEST_DIR)

$(PLANTUML_DEST_DIR)/%.uml.png: $(PLANTUML_SRC_DIR)/%.uml | $(PLANTUML_DEST_DIR)
	$(PLANTUML_PLANTUML_COMMAND) -pipe -tpng < $< > $@

$(PLANTUML_DEST_DIR)/%.uml.svg: $(PLANTUML_SRC_DIR)/%.uml | $(PLANTUML_DEST_DIR)
	$(PLANTUML_PLANTUML_COMMAND) -pipe -tsvg < $< > $@

$(PLANTUML_DEST_DIR)/%.uml.pdf: $(PLANTUML_DEST_DIR)/%.uml.svg | $(PLANTUML_DEST_DIR)
	$(PLANTUML_RSVGCONVERT_COMMAND) -f ps $< | $(PLANTUML_GHOSTSCRIPT_COMMAND) -sDEVICE=pdfwrite -sOutputFile=$@ -f -


.PHONY: plantuml-uml-svg
plantuml-uml-svg: $(PLANTUML_UML_SVG)

.PHONY: plantuml-uml-png
plantuml-uml-png: $(PLANTUML_UML_PNG)

.PHONY: plantuml-uml-pdf
plantuml-uml-pdf: $(PLANTUML_UML_PDF)

.PHONY: plantuml-svg
plantuml-svg: plantuml-uml-svg

.PHONY: plantuml-png
plantuml-png: plantuml-uml-png

.PHONY: plantuml-pdf
plantuml-pdf: plantuml-uml-pdf

.PHONY: plantuml-clean-svg
plantuml-clean-svg:
	rm -f $(PLANTUML_UML_SVG)

.PHONY: plantuml-clean-png
plantuml-clean-png:
	rm -f $(PLANTUML_UML_PNG)

.PHONY: plantuml-clean-pdf
plantuml-clean-pdf:
	rm -f $(PLANTUML_UML_PDF)

.PHONY: plantuml-clean
plantuml-clean: plantuml-clean-pdf plantuml-clean-svg

.PHONY: plantuml-info
plantuml-info:
	@echo "PLANTUML:"
	@echo "  External variables:"
	@echo "    PLANTUML_SUFFIX: $(PLANTUML_SUFFIX)"
	@echo "    PLANTUML_DEST_DIR: $(PLANTUML_DEST_DIR)"
	@echo "    PLANTUML_SRC_DIR: $(PLANTUML_SRC_DIR)"
	@echo "    PLANTUML_PLANTUML_COMMAND: $(PLANTUML_PLANTUML_COMMAND)"
	@echo "    PLANTUML_RSVGCONVERT_COMMAND: $(PLANTUML_RSVGCONVERT_COMMAND)"
	@echo "    PLANTUML_GHOSTSCRIPT_COMMAND: $(PLANTUML_GHOSTSCRIPT_COMMAND)"
	@echo "  Internal variables"
	@echo "    PLANTUML_UML: $(PLANTUML_UML)"
	@echo "    PLANTUML_UML_PDF: $(PLANTUML_UML_PDF)"
	@echo "    PLANTUML_UML_PNG: $(PLANTUML_UML_PNG)"
	@echo "    PLANTUML_UML_SVG: $(PLANTUML_UML_SVG)"