cleanups

check Erlang 18 compatibility

.travis.yml

@@ -1,5 +1,9 @@
 language: erlang
+sudo: false
 otp_release:
+# Test on all supported releases
+   - 18.0
+   - 17.5
    - 17.4
    - 17.3
    - 17.1
@@ -15,10 +19,9 @@ otp_release:
    - R15B
 
 script:
-  - rebar get-deps
-  - rebar compile 
+  - make
   - rebar eunit -v skip_deps=true
-  - mkdir plt
-  - ./travis-dialyzer.sh
+  - make plt
+  - make dialyze
 notifications:
   email: false

Makefile

@@ -1,21 +1,48 @@
 ERL=erl
 REBAR=./rebar
 GIT = git
-REBAR_VER = 2.5.1
+REBAR_VER = 2.6.0
+
+.PHONY: get-deps
 
 all: compile
 
 compile:
 	@$(REBAR) get-deps
 	@$(REBAR) compile
 
-clean:
-	@$(REBAR) clean
-
 rebar_src:
 	@rm -rf $(PWD)/rebar_src
 	@$(GIT) clone git://github.com/rebar/rebar.git rebar_src
 	@$(GIT) -C rebar_src checkout tags/$(REBAR_VER)
 	@cd $(PWD)/rebar_src/; ./bootstrap
 	@cp $(PWD)/rebar_src/rebar $(PWD)
 	@rm -rf $(PWD)/rebar_src
+
+get-deps:
+	@$(REBAR) get-deps
+
+## dialyzer
+PLT_FILE = ~/boss_db.plt
+PLT_APPS ?= kernel stdlib erts deps/*
+DIALYZER_OPTS ?= -Werror_handling -Wrace_conditions -Wunmatched_returns \
+		-Wunderspecs --verbose --fullpath -n
+
+.PHONY: dialyze
+dialyze: all
+	@[ -f $(PLT_FILE) ] || $(MAKE) plt
+	@dialyzer --plt $(PLT_FILE) $(DIALYZER_OPTS) ebin || [ $$? -eq 2 ];
+
+## In case you are missing a plt file for dialyzer,
+## you can run/adapt this command
+.PHONY: plt
+plt:
+	@echo "Building PLT, may take a few minutes"
+	@dialyzer --build_plt --output_plt $(PLT_FILE) --apps \
+		$(PLT_APPS) || [ $$? -eq 2 ];
+
+clean:
+	@$(REBAR) clean
+	rm -fv erl_crash.dump
+	rm -f $(PLT_FILE)
+