Radix cross Linux 3pp sources

#
# Project Home:
# ============
#   https://developers.hp.com/hp-linux-imaging-and-printing
#   https://developers.hp.com/hp-linux-imaging-and-printing/gethplip
#   https://launchpad.net/hplip
#   https://sourceforge.net/projects/hplip
#
# Downloads:
# =========
#   https://downloads.sourceforge.net/project/hplip/hplip/${VERSION}
#

url         = https://downloads.sourceforge.net/project/hplip/hplip

versions    = 3.13.10 3.14.10 3.15.9 3.15.11 3.16.5
versions   += 3.16.7 3.21.2 3.23.3

pkgname     = hplip
suffix      = tar.gz
sign_suffix = asc

tarballs    = $(addsuffix .$(suffix), $(addprefix $(pkgname)-, $(versions)))
signatures  = $(addsuffix .$(sign_suffix), $(tarballs))
sha1s       = $(addsuffix .sha1sum, $(tarballs))


all: $(tarballs) $(signatures) $(sha1s)

.PHONY: downloads_clean

$(tarballs):
	@echo -e "\n======= Downloading source tarballs =======\n"
	@for tarball in $(tarballs) ; do \
	  version=`echo $$tarball | sed 's/\([a-zA-Z0-9-]*\)\([0-9][.0-9]*[.0-9]*\)\(\..*\)/\2/'` ; \
	  wget -N $(url)/$$version/$$tarball ; \
	done

$(signatures): %.$(suffix).$(sign_suffix) : %.$(suffix)
	@for signature in $@ ; do \
	  echo -e "\n======= Downloading '$$signature' signature =======\n" ; \
	  version=`echo $$signature | sed 's/\([a-zA-Z0-9-]*\)\([0-9][.0-9]*[.0-9]*\)\(\..*\)/\2/'` ; \
	  wget -N $(url)/$$version/$$signature ; \
	  touch $$signature ; \
	done

$(sha1s): %.$(suffix).sha1sum : %.$(suffix)
	@for tarball in $< ; do \
	  echo -e "\n======= Calculation the '$$tarball' sha1sum =======\n" ; \
	  sha1sum --binary $$tarball > $$tarball.sha1sum ; \
	done

downloads_clean:
	@rm -rf $(tarballs) $(signatures) $(sha1s)