add diagrams

docs/diagrams/Makefile

@@ -0,0 +1,27 @@
+SHELL := /usr/bin/env bash
+
+.PHONY: diagrams clean_diagrams
+
+usage:
+	@echo "usage: make <command> [OPTIONS]"
+	@echo
+	@echo "Available commands:"
+	@echo "  diagrams       -- Create the diagrams from .dot files"
+	@echo "  clean_diagrams -- Delete the diagram images"
+
+DOT_INPUTS := $(wildcard ./*.dot)
+DOT_SVGS := $(patsubst %.dot,%.svg,$(DOT_INPUTS))
+DOT_PNGS := $(patsubst %.dot,%.png,$(DOT_INPUTS))
+
+diagrams: $(DOT_SVGS) $(DOT_PNGS)
+	@echo $(DOT_SVGS)
+
+clean_diagrams:
+	rm $(DOT_SVGS)
+	rm $(DOT_PNGS)
+
+%.png: %.svg
+	convert $< $@
+
+%.svg: %.dot
+	dot -Tsvg $< -o $@