PWD = $(shell pwd)
ifndef JANA_VERSION
       JANA_VERSION = 0.7.2
endif
JANA_DIR = jana_$(JANA_VERSION)
TARFILE = jana_$(JANA_VERSION).tgz
export JANA_HOME = $(PWD)/$(JANA_DIR)

all: prod_link

prod_link: sconstruct
	test -L prod || ln -s $(JANA_DIR) prod # will not overwrite existing link

# uncomment one of the following two lines to choose checkout of
# source code or retrieval of a tar file
ifdef JANA_VERSION
sconstruct: $(JANA_HOME)/.untar_done # tar file
else
sconstruct: $(JANA_HOME)/.checkout_done # checkout
endif
	cd $(JANA_HOME); scons

$(JANA_HOME)/.checkout_done:
	svn co https://phys12svn.jlab.org/repos/JANA
	date > $@

$(JANA_HOME)/.untar_done: $(TARFILE)
	tar zxvf $(TARFILE)
	date > $@

$(TARFILE):
	@echo making $@
	wget http://www.jlab.org/JANA/releases/$(TARFILE)