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# Copyright (c) 2013-2016, Loïc Hoguin <[email protected]>
# This file is part of erlang.mk and subject to the terms of the ISC License.

.PHONY: plt distclean-plt dialyze

# Configuration.

DIALYZER_PLT ?= $(CURDIR)/.$(PROJECT).plt
export DIALYZER_PLT

PLT_APPS ?=
DIALYZER_DIRS ?= --src -r $(wildcard src) $(ALL_APPS_DIRS)
DIALYZER_OPTS ?= -Werror_handling -Wrace_conditions -Wunmatched_returns # -Wunderspecs

# Core targets.

check:: dialyze

distclean:: distclean-plt

help::
	$(verbose) printf "%s\n" "" \
		"Dialyzer targets:" \
		"  plt         Build a PLT file for this project" \
		"  dialyze     Analyze the project using Dialyzer"

# Plugin-specific targets.

define filter_opts.erl
	Opts = init:get_plain_arguments(),
	{Filtered, _} = lists:foldl(fun
		(O,                         {Os, true}) -> {[O|Os], false};
		(O = "-D",                  {Os, _})    -> {[O|Os], true};
		(O = [\\$$-, \\$$D, _ | _], {Os, _})    -> {[O|Os], false};
		(O = "-I",                  {Os, _})    -> {[O|Os], true};
		(O = [\\$$-, \\$$I, _ | _], {Os, _})    -> {[O|Os], false};
		(O = "-pa",                 {Os, _})    -> {[O|Os], true};
		(_,                         Acc)        -> Acc
	end, {[], false}, Opts),
	io:format("~s~n", [string:join(lists:reverse(Filtered), " ")]),
	halt().
endef

$(DIALYZER_PLT): deps app
	$(eval DEPS_LOG := $(shell test -f $(ERLANG_MK_TMP)/deps.log && \
		while read p; do test -d $$p/ebin && echo $$p/ebin; done <$(ERLANG_MK_TMP)/deps.log))
	$(verbose) dialyzer --build_plt --apps erts kernel stdlib \
		$(PLT_APPS) $(OTP_DEPS) $(LOCAL_DEPS) $(DEPS_LOG)

plt: $(DIALYZER_PLT)

distclean-plt:
	$(gen_verbose) rm -f $(DIALYZER_PLT)

ifneq ($(wildcard $(DIALYZER_PLT)),)
dialyze:
else
dialyze: $(DIALYZER_PLT)
endif
	$(verbose) dialyzer --no_native `$(ERL) -eval "$(subst $(newline),,$(call escape_dquotes,$(call filter_opts.erl)))" -extra $(ERLC_OPTS)` $(DIALYZER_DIRS) $(DIALYZER_OPTS)