all:

DC_EXT                      ?= xz bzip2 gz zip
DC_COMPRESSED_ALL           ?= $(foreach ext,$(DC_EXT),$(wildcard *.$(ext)))
DC_UNCOMPRESSED_ALL         ?= $(foreach patt,$(DC_EXT),$(patsubst %.$(patt),%,$(wildcard *.$(patt))))

all: $(DC_UNCOMPRESSED_ALL)
clean: clean.uncompressed
clean.uncompressed:
	rm -f $(DC_UNCOMPRESSED_ALL)

%: %.xz
	xz -dk $<
%: %.gz
	gunzip -k $<
%: %.bzip2
	bunzip -k $<
%: %.zip
	unzip $<