Ruby-toplevel.mk

versions := *
override versions := $(patsubst %/,%,$(dir $(wildcard $(addsuffix /Makefile,$(versions)) $(addsuffix /src/Makefile,$(versions)))))
goals := all $(filter-out %/all $(shell sed '/^[a-zA-Z_][-a-zA-Z0-9_]*:/!d;s/:.*//;s:.*:& %/&:' $(MAKEFILE_LIST)),$(MAKECMDGOALS))
unexport versions goals
svn_versions := $(dir $(wildcard $(addsuffix /.svn,$(versions))))
git_versions := $(dir $(wildcard $(addsuffix /.git,$(versions))))

define dive
+$(MAKE) -C $(@D) $(if $(filter --,$(MAKEFLAGS))$(filter $(firstword $(MAKEFLAGS)),$(subst =,,$(firstword $(MAKEFLAGS)))),-)$(MAKEFLAGS) $(@F)
endef
define no-need-install
! { [ -e $(@D)/miniruby ] && $(@D)/miniruby -e 'exit RUBY_REVISION > `ruby-#{RUBY_VERSION} -e "p RUBY_REVISION"`.to_i'; }
endef

$(foreach goal,$(goals),$(eval $(value goal): $$(versions:=/$(value goal))))
$(foreach subdir,$(versions),$(eval $(value subdir)/%:; $$(call dive)))

up: up-remote up-local
	$(if $(wildcard .svn),svn up)
#$(foreach subdir,$(versions),$(eval $(value subdir)/up:; svn up --accept postpone $$(@D)))

$(foreach target,remote local,\
$(eval up-$(value target): $(addsuffix /up-$(value target),$(versions)))\
)

$(foreach target,remote local,\
$(foreach subdir,$(versions),\
$(eval $(value subdir)/up-$(value target):; +$(MAKE) -$(MAKEFLAGS) -C $$(@D) UPDATE_PREREQ= up-$(value target))\
))

resolved:
	@PWD= resolve-conflict $(versions)

stat: status
status:
	$(if $(svn_versions),! svn $@ $(svn_versions) | grep '^C')
	$(if $(git_versions),@for dir in $(git_versions); do (echo $$dir; cd $$dir && exec git $@); done)

edit:
	$(EDITOR) `svn stat $(versions) | sed -n 's/^C//p'`

sudo-install: stable/sudo-install trunk/sudo-install
stable/sudo-install trunk/sudo-install:
	@$(call no-need-install) || $(call dive)