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# Copyright (c) 2014, Enrique Fernandez <[email protected]>
# This file is contributed to erlang.mk and subject to the terms of the ISC License.

.PHONY: help-eunit build-eunit eunit distclean-eunit

# Configuration

EUNIT_ERLC_OPTS ?= +debug_info +warn_export_vars +warn_shadow_vars +warn_obsolete_guard -DTEST=1 -DEXTRA=1

EUNIT_DIR ?=
EUNIT_DIRS = $(sort $(EUNIT_DIR) ebin)

ifeq ($(strip $(EUNIT_DIR)),)
TAGGED_EUNIT_TESTS = {dir,"ebin"}
else
# All modules in EUNIT_DIR
EUNIT_DIR_MODS = $(notdir $(basename $(shell find $(EUNIT_DIR) -type f -name *.beam)))
# All modules in 'ebin'
EUNIT_EBIN_MODS = $(notdir $(basename $(shell find ebin -type f -name *.beam)))
# Only those modules in EUNIT_DIR with no matching module in 'ebin'.
# This is done to avoid some tests being executed twice.
EUNIT_MODS = $(filter-out $(patsubst %,%_tests,$(EUNIT_EBIN_MODS)),$(EUNIT_DIR_MODS))
TAGGED_EUNIT_TESTS = {dir,"ebin"} $(foreach mod,$(EUNIT_MODS),$(shell echo $(mod) | sed -e 's/\(.*\)/{module,\1}/g'))
endif

EUNIT_OPTS ?= verbose

# Utility functions

define str-join
	$(shell echo '$(strip $(1))' | sed -e "s/ /,/g")
endef

# Core targets.

help:: help-eunit

tests:: eunit

clean:: clean-eunit

# Plugin-specific targets.

EUNIT_RUN = erl \
	-no_auto_compile \
	-noshell \
	-pa $(realpath $(EUNIT_DIR)) $(DEPS_DIR)/*/ebin \
	-pz $(realpath ebin) \
	-eval 'case eunit:test([$(call str-join,$(TAGGED_EUNIT_TESTS))], [$(EUNIT_OPTS)]) of ok -> erlang:halt(0); error -> erlang:halt(1) end.'

help-eunit:
	@printf "%s\n" "" \
		"EUnit targets:" \
		"  eunit       Run all the EUnit tests for this project"

ifeq ($(strip $(EUNIT_DIR)),)
build-eunit:
else ifeq ($(strip $(EUNIT_DIR)),ebin)
build-eunit:
else
build-eunit:
	$(gen_verbose) erlc -v $(EUNIT_ERLC_OPTS) -I include/ -o $(EUNIT_DIR) \
		$(wildcard $(EUNIT_DIR)/*.erl $(EUNIT_DIR)/*/*.erl) -pa ebin/
endif

eunit: ERLC_OPTS = $(EUNIT_ERLC_OPTS)
eunit: clean deps app build-eunit
	$(gen_verbose) $(EUNIT_RUN)

clean-eunit:
	$(gen_verbose) $(foreach dir,$(EUNIT_DIRS),rm -rf $(dir)/*.beam)