4 files changed, 114 insertions, 15 deletions
diff --git a/core/core.mk b/core/core.mk
index 95b4c57..8622be2 100644
--- a/core/core.mk
+++ b/core/core.mk
@@ -38,16 +38,20 @@ ifneq ($(words $(MAKECMDGOALS)),1)
 .NOTPARALLEL:
 endif
 
-all::
-	@$(MAKE) --no-print-directory deps
+all:: deps
 	@$(MAKE) --no-print-directory app
-# @todo Plugin stuff creeping inside Core, not good.
-ifneq ($(wildcard $(RELX_CONFIG)),)
 	@$(MAKE) --no-print-directory rel
-endif
 
-clean::
+# Noop to avoid a Make warning when there's nothing to do.
+rel::
+	@echo -n
+
+clean:: clean-crashdump
+
+clean-crashdump:
+ifneq ($(wildcard erl_crash.dump),)
 	$(gen_verbose) rm -f erl_crash.dump
+endif
 
 distclean:: clean
 
diff --git a/core/deps.mk b/core/deps.mk
index 7d4b974..35fefb5 100644
--- a/core/deps.mk
+++ b/core/deps.mk
@@ -5,6 +5,9 @@
 
 # Configuration.
 
+AUTOPATCH ?= edown gen_leader gproc
+export AUTOPATCH
+
 DEPS_DIR ?= $(CURDIR)/deps
 export DEPS_DIR
 
@@ -42,6 +45,41 @@ distclean:: distclean-deps distclean-pkg
 
 # Deps related targets.
 
+define dep_autopatch
+	$(ERL) -eval " \
+DepDir = \"$(DEPS_DIR)/$(1)/\", \
+fun() -> \
+	{ok, Conf} = file:consult(DepDir ++ \"rebar.config\"), \
+	File = case lists:keyfind(deps, 1, Conf) of false -> []; {_, Deps} -> \
+		[begin {Method, Repo, Commit} = case Repos of \
+			{git, R} -> {git, R, master}; \
+			{M, R, {branch, C}} -> {M, R, C}; \
+			{M, R, {tag, C}} -> {M, R, C}; \
+			{M, R, C} -> {M, R, C} \
+		end, \
+		io_lib:format(\"DEPS += ~s\ndep_~s = ~s ~s ~s~n\", [Name, Name, Method, Repo, Commit]) \
+		end || {Name, _, Repos} <- Deps] \
+	end, \
+	ok = file:write_file(\"$(DEPS_DIR)/$(1)/Makefile\", [\"ERLC_OPTS = +debug_info\n\n\", File, \"\ninclude erlang.mk\"]) \
+end(), \
+AppSrcOut = \"$(DEPS_DIR)/$(1)/src/$(1).app.src\", \
+AppSrcIn = case filelib:is_regular(AppSrcOut) of false -> \"$(DEPS_DIR)/$(1)/ebin/$(1).app\"; true -> AppSrcOut end, \
+fun() -> \
+	{ok, [{application, $(1), L}]} = file:consult(AppSrcIn), \
+	L2 = case lists:keyfind(modules, 1, L) of {_, _} -> L; false -> [{modules, []}|L] end, \
+	L3 = case lists:keyfind(vsn, 1, L2) of {vsn, git} -> lists:keyreplace(vsn, 1, L2, {vsn, \"git\"}); _ -> L2 end, \
+	ok = file:write_file(AppSrcOut, io_lib:format(\"~p.~n\", [{application, $(1), L3}])) \
+end(), \
+case AppSrcOut of AppSrcIn -> ok; _ -> ok = file:delete(AppSrcIn) end, \
+halt()."
+endef
+
+ifeq ($(V),0)
+define dep_autopatch_verbose
+	@echo " PATCH " $(1);
+endef
+endif
+
 define dep_fetch
 	if [ "$$$$VS" = "git" ]; then \
 		git clone -n -- $$$$REPO $(DEPS_DIR)/$(1); \
@@ -73,6 +111,15 @@ else
 	COMMIT=$(word 3,$(dep_$(1))); \
 	$(call dep_fetch,$(1))
 endif
+ifneq ($(filter $(1),$(AUTOPATCH)),)
+	$(call dep_autopatch_verbose,$(1)) if [ -f $(DEPS_DIR)/$(1)/rebar.config ]; then \
+		$(call dep_autopatch,$(1)); \
+		cd $(DEPS_DIR)/$(1)/ && ln -s ../../erlang.mk; \
+	elif [ ! -f $(DEPS_DIR)/$(1)/Makefile ]; then \
+		echo "ERLC_OPTS = +debug_info\ninclude erlang.mk" > $(DEPS_DIR)/$(1)/Makefile; \
+		cd $(DEPS_DIR)/$(1)/ && ln -s ../../erlang.mk; \
+	fi
+endif
 endef
 
 $(foreach dep,$(DEPS),$(eval $(call dep_target,$(dep))))
diff --git a/core/erlc.mk b/core/erlc.mk
index 8d720aa..e391da8 100644
--- a/core/erlc.mk
+++ b/core/erlc.mk
@@ -31,9 +31,15 @@ xyrl_verbose = $(xyrl_verbose_$(V))
 mib_verbose_0 = @echo " MIB   " $(filter %.bin %.mib,$(?F));
 mib_verbose = $(mib_verbose_$(V))
 
-# Core targets.
+# Targets.
 
-app:: erlc-include ebin/$(PROJECT).app
+ifeq ($(wildcard ebin/test),)
+app:: app-build
+else
+app:: clean app-build
+endif
+
+app-build: erlc-include ebin/$(PROJECT).app
 	$(eval MODULES := $(shell find ebin -type f -name \*.beam \
 		| sed "s/ebin\//'/;s/\.beam/',/" | sed '$$s/.$$//'))
 	@if [ -z "$$(grep -E '^[^%]*{modules,' src/$(PROJECT).app.src)" ]; then \
@@ -46,6 +52,11 @@ app:: erlc-include ebin/$(PROJECT).app
 		| sed "s/{id,[[:space:]]*\"git\"}/{id, \"$(GITDESCRIBE)\"}/" \
 		> ebin/$(PROJECT).app
 
+erlc-include:
+	-@if [ -d ebin/ ]; then \
+		find include/ src/ -type f -name \*.hrl -newer ebin -exec touch $(shell find src/ -type f -name "*.erl") \; 2>/dev/null || printf ''; \
+	fi
+
 define compile_erl
 	$(erlc_verbose) erlc -v $(ERLC_OPTS) -o ebin/ \
 		-pa ebin/ -I include/ $(filter-out $(ERLC_EXCLUDE_PATHS),\
@@ -85,13 +96,6 @@ endif
 
 clean:: clean-app
 
-# Extra targets.
-
-erlc-include:
-	-@if [ -d ebin/ ]; then \
-		find include/ src/ -type f -name \*.hrl -newer ebin -exec touch $(shell find src/ -type f -name "*.erl") \; 2>/dev/null || printf ''; \
-	fi
-
 clean-app:
 	$(gen_verbose) rm -rf ebin/ priv/mibs/ \
 		$(addprefix include/,$(addsuffix .hrl,$(notdir $(basename $(wildcard mibs/*.mib)))))
diff --git a/core/test.mk b/core/test.mk
new file mode 100644
index 0000000..d3f49c2
--- /dev/null
+++ b/core/test.mk
@@ -0,0 +1,44 @@
+# Copyright (c) 2015, Loïc Hoguin <[email protected]>
+# This file is part of erlang.mk and subject to the terms of the ISC License.
+
+.PHONY: test-deps test-dir test-build clean-test-dir
+
+# Configuration.
+
+TEST_DIR ?= test
+
+ALL_TEST_DEPS_DIRS = $(addprefix $(DEPS_DIR)/,$(TEST_DEPS))
+
+TEST_ERLC_OPTS ?= +debug_info +warn_export_vars +warn_shadow_vars +warn_obsolete_guard
+TEST_ERLC_OPTS += -DTEST=1
+
+# Targets.
+
+$(foreach dep,$(TEST_DEPS),$(eval $(call dep_target,$(dep))))
+
+test-deps: $(ALL_TEST_DEPS_DIRS)
+	@for dep in $(ALL_TEST_DEPS_DIRS) ; do $(MAKE) -C $$dep; done
+
+ifneq ($(strip $(TEST_DIR)),)
+test-dir:
+	$(gen_verbose) erlc -v $(TEST_ERLC_OPTS) -I include/ -o $(TEST_DIR) \
+		$(wildcard $(TEST_DIR)/*.erl $(TEST_DIR)/*/*.erl) -pa ebin/
+endif
+
+ifeq ($(wildcard ebin/test),)
+test-build: ERLC_OPTS=$(TEST_ERLC_OPTS)
+test-build: clean deps test-deps
+	@$(MAKE) --no-print-directory app-build test-dir ERLC_OPTS="$(TEST_ERLC_OPTS)"
+	$(gen_verbose) touch ebin/test
+else
+test-build: ERLC_OPTS=$(TEST_ERLC_OPTS)
+test-build: deps test-deps
+	@$(MAKE) --no-print-directory app-build test-dir ERLC_OPTS="$(TEST_ERLC_OPTS)"
+endif
+
+clean:: clean-test-dir
+
+clean-test-dir:
+ifneq ($(wildcard $(TEST_DIR)/*.beam),)
+	$(gen_verbose) rm -f $(TEST_DIR)/*.beam
+endif