# Root makefile that can be used to build/run tests and examples for some
# or all databases:
# make           - build tests and examples for all the databases
# make test      - build and run tests and examples for all the databases
# make <db>      - build tests and examples for <db>
# make <db>-test - build and run tests and examples for <db>
#
db := oracle pgsql sqlite mysql

.PHONY: all test clean $(db) $(addsuffix -test,$(db)) $(addsuffix -clean,$(db))

all: $(db)
test: $(addsuffix -test,$(db))
test: $(addsuffix -clean,$(db))

define set_dirs
edir := $$(wildcard examples-$1-default)
tdir := $$(wildcard tests-$1-default)

ifeq ($$(edir),)
edir := examples-$1
endif

ifeq ($$(tdir),)
tdir := tests-$1
endif
endef

define build_rule
$1: edir := $$(edir)
$1: tdir := $$(tdir)

$1:
	@$$(MAKE) -C $$(edir)
	@$$(MAKE) -C $$(tdir)
endef

define test_rule
$1-test: edir := $$(edir)
$1-test: tdir := $$(tdir)

$1-test:
	@$$(MAKE) -C $$(edir) test
	@$$(MAKE) -C $$(tdir) test
endef

define clean_rule
$1-clean: edir := $$(edir)
$1-clean: tdir := $$(tdir)

$1-clean:
	@$$(MAKE) -C $$(edir) clean
	@$$(MAKE) -C $$(tdir) clean
endef

# Note: empty line at the end is important.
#
#
define rules
$(call set_dirs,$1)
$(call build_rule,$1)
$(call test_rule,$1)
$(call clean_rule,$1)

endef

$(eval $(foreach d,$(db),$(call rules,$d)))