generate db with makefile

Makefile

@@ -0,0 +1,27 @@
+help: ## Print the help message
+	@awk 'BEGIN {FS = ":.*?## "} /^[0-9a-zA-Z._-]+:.*?## / {printf "\033[36m%s\033[0m : %s\n", $$1, $$2}' $(MAKEFILE_LIST) | \
+		sort | \
+		column -s ':' -t
+
+articles != find * -type f -name "*.md"
+
+db.rec: $(articles)
+	for x in $^ ; do \
+	sed -n '2,/^---$$/ {/^---$$/d; p}' "$$x" |\
+	tr -d '"[]' ;\
+	printf "file: %s\n\n" "$$x" ;\
+	done > $@
+
+default += db.rec
+
+.git/info/exclude: $(default)
+	echo $^ | tr ' ' '\n' > $@
+
+default += .git/info/exclude
+
+.PHONY: database
+database: $(default) ## Make a database for recfiles
+
+.PHONY: clean
+clean:
+	$(RM) $(default)