#
WEBFETCH		:= curl -H Pragma: -O -R -S --fail --show-error
SHA1SUM			:= sha1sum

# initial from http://oml.mytestbed.net/attachments/download/496/oml2-2.5.1.tar.gz
REPO :=	http://mirror.onelab.eu/third-party/

ALL += oml
oml-URL			:= $(REPO)/oml2-2.6.1.tar.gz
oml-SHA1SUM		:= 529b23cc1199cac1bcd6066f9df9d8063a76da23
oml			:= $(notdir $(oml-URL))
ALL += oml

all: $(ALL)
.PHONY: all

##############################
define download_target
$(1): $($(1))
.PHONY: $($(1))
$($(1)): 
	@if [ ! -e "$($(1))" ] ; then echo "$(WEBFETCH) $($(1)-URL)" ; $(WEBFETCH) $($(1)-URL) ; fi
	@if [ ! -e "$($(1))" ] ; then echo "Could not download source file: $($(1)) does not exist" ; exit 1 ; fi
	@if test "$$$$($(SHA1SUM) $($(1)) | awk '{print $$$$1}')" != "$($(1)-SHA1SUM)" ; then \
	    echo "sha1sum of the downloaded $($(1)) does not match the one from 'Makefile'" ; \
	    echo "Local copy: $$$$($(SHA1SUM) $($(1)))" ; \
	    echo "In Makefile: $($(1)-SHA1SUM)" ; \
	    false ; \
	else \
	    ls -l $($(1)) ; \
	fi
CLEAN += $($(1))
endef

$(eval $(call download_target,oml))

clean:
	rm -f $(CLEAN)
.PHONY: clean

#################### convenience, for debugging only
# make +foo : prints the value of $(foo)
# make ++foo : idem but verbose, i.e. foo=$(foo)
++%: varname=$(subst +,,$@)
++%:
	@echo "$(varname)=$($(varname))"
+%: varname=$(subst +,,$@)
+%:
	@echo "$($(varname))"