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

ANT = ant
EGREP = grep -E
EXISTS = test -e
FAIL = exit 1
FIND = find
INSTALL = install
PRINTF = printf
RM = rm -f
TOUCH = touch

version = 3.1

dep_dir = $1 $(shell $(FIND) $1 2>/dev/null)
findjar = $(firstword $(shell IFS=:; $(PRINTF) '%s\n' $$CLASSPATH | $(EGREP) '/$1(-[0-9.-]*)?\.jar$$') /notfound.jar)
asm_jar = $(call findjar,asm)

all: PHONY dist

dist: $(call dep_dir,src xdocs) lib/asm-4.2.jar
	$(RM) -r $@ build
	$(ANT) dist || { $(RM) -r $@ build; $(FAIL); }
	$(EXISTS) $@
	$(TOUCH) $@

dist/%.jar: dist
	$(EXISTS) $@
	$(TOUCH) $@

lib/asm-4.2.jar: $(asm_jar)
	$(INSTALL) -Dm644 $< $@

install: PHONY dist $(foreach n,cglib cglib-docs cglib-nodep cglib-src,$(DESTDIR)$(JAR_DIR)/$n-$(version).jar)

$(DESTDIR)$(JAR_DIR)/%.jar: dist/%.jar
	$(INSTALL) -Dm644 $< $@

clean: PHONY
	$(RM) -r dist build lib/*.jar

.PHONY: PHONY
.DELETE_ON_ERROR:
.SECONDARY: