DESTDIR ?=

ANT        = ant
EXISTS     = test -e
FAIL       = exit 1
FIND       = find
RM         = rm -f
XMLSTARLET = xml

export MODELLO_CLASSPATH := $(shell modello-classpath)
export PMDG_CLASSPATH    := $(shell plexus-metadata-generator-classpath)
export M2_HOME            = $(DESTDIR)/opt/maven

dep_dir    = $1 $(shell $(FIND) $1 2>/dev/null)
dep_optdir = $(shell $(FIND) $1 2>/dev/null)

pom_get = $(shell $(XMLSTARLET) sel -T -t $(foreach xpath,$1, -v '$(subst /,/_:,$(xpath))' -n) pom.xml)

version := $(call pom_get,/project/version)
maven_assembly = apache-maven/target/apache-maven-$(version)-bin.zip

install: PHONY
	$(ANT) -Dskip.pull=true extract-assembly || { $(RM) -r bootstrap/target; $(FAIL); }
	$(EXISTS) '$@'
	$(TOUCH) '$@'

####

# install: extract-assembly
# all: apache-maven/target/apache-maven-$(version)-bin.zip

# bootstrap/target/generated-sources: $(call dep_dir,$(wildcard */src/main/mdo))
# 	$(ANT) -Dskip.pull=true generate-sources || { $(RM) -r '$@'; $(FAIL); }
# 	$(TOUCH) '$@'

# bootstrap/target/classes: $(call dep_dir,bootstrap/target/generated-sources $(wildcard */src/main/java))
# 	$(ANT) -Dskip.pull=true compile-boot || { $(RM) -r '$@'; $(FAIL); }
# 	$(TOUCH) '$@'

# bootstrap/target/classes/META-INF/plexus/components.xml: \
#     $(call dep_dir,maven-compat/src/main/java) \
#     $(call dep_dir,maven-core/src/main/resources/META-INF/plexus) \
#     bootstrap/target/classes $(shell $(FIND) bootstrap/target/classes -name '*.class' -o -type d)
# 	$(ANT) -Dskip.pull=true process-classes
# 	$(EXISTS) '$@'
# 	$(TOUCH) '$@'

# modules = $(call pom_get,/project/modules/module)
# apache-maven/target/apache-maven-$(version)-bin.zip: \
#     bootstrap/target/classes/META-INF/plexus/components.xml \
#     $(foreach module,. $(modules),$(module)/pom.xml $(call dep_dir,$(module)/src))
# 	$(ANT) -Dskip.pull=true maven-assembly
# 	$(EXISTS) '$@'
# 	$(TOUCH) '$@'

.PHONY: PHONY
.SECONDARY:
.DELETE_ON_ERROR: