Allow collecting Lua filters into folder or tar archive

Author: tarleb

.gitignore

@@ -0,0 +1,2 @@
+# Build artifacts in main and subdirs
+.build

Makefile

@@ -1,14 +1,39 @@
 FILTERS=$(wildcard $(shell find * -type d | grep -v '[/\\]'))
+FILTER_FILES=$(shell find * -name "*.lua" -type f)
 LUA_FILTERS_TEST_IMAGE = pandoc/lua-filters-test
 
-.PHONY: test docker-test docker-test-image
+.PHONY: test show-args docker-test docker-test-image archive
 
 test:
 	bash runtests.sh $(FILTERS)
 
+archive: .build/lua-filters.tar.gz
+
+show-vars:
+	@printf "FILTERS: %s\n" $(FILTERS)
+	@printf "FILTER_FILES: %s\n" $(FILTER_FILES)
+
 docker-test:
 	docker run --rm --volume "$(PWD):/data" $(LUA_FILTERS_TEST_IMAGE) \
 	    make test
 
 docker-test-image: .tools/Dockerfile
 	docker build --tag $(LUA_FILTERS_TEST_IMAGE) --file $< .
+
+# Build a single collection of Lua filters
+.PHONY: collection
+collection: .build/lua-filters
+
+.build/lua-filters: $(FILTER_FILES)
+	mkdir -p .build/lua-filters
+	cp -a $(FILTER_FILES) .build/lua-filters
+	cp -a LICENSE .build/lua-filters
+	@printf "Filters collected in '%s'\n" "$@"
+
+.build/lua-filters.tar.gz: .build/lua-filters
+	tar -czf $@ -C .build lua-filters
+	@printf "Archive written to '%s'\n" "$@"
+
+clean:
+	rm -rf .build
+	$(foreach f,$(FILTERS),make -C $(f) clean;)