DESTDIR ?=
JAR_DIR ?= /usr/share/java

ANT = ant
EXISTS = test -e
FAIL = exit 1
FIND = find
INSTALL = install
RM = rm -f
TOUCH = touch

all: PHONY output/lib/ow_util_ant_tasks.jar

output/lib/ow_util_ant_tasks.jar: $(shell $(FIND) src)
	$(ANT) jar && $(EXISTS) $@ || { $(RM) -r output; $(FAIL); }

install: PHONY $(DESTDIR)$(JAR_DIR)/ow_util_ant_tasks.jar

$(DESTDIR)$(JAR_DIR)/ow_util_ant_tasks.jar: output/lib/ow_util_ant_tasks.jar
	$(INSTALL) -Dm644 $< $@

clean: PHONY
	$(RM) -r output

.PHONY: PHONY
.DELETE_ON_ERROR:
.SECONDARY: