Add support for relx.config.script back

It was removed accidentally when switching to Relx v4.

plugins/relx.mk

@@ -7,6 +7,7 @@ ifeq ($(filter relx,$(BUILD_DEPS) $(DEPS) $(REL_DEPS)),relx)
 # Configuration.
 
 RELX_CONFIG ?= $(CURDIR)/relx.config
+RELX_CONFIG_SCRIPT ?= $(CURDIR)/relx.config.script
 
 RELX_OUTPUT_DIR ?= _rel
 RELX_REL_EXT ?=
@@ -19,7 +20,7 @@ endif
 # Core targets.
 
 ifeq ($(IS_DEP),)
-ifneq ($(wildcard $(RELX_CONFIG)),)
+ifneq ($(wildcard $(RELX_CONFIG))$(wildcard $(RELX_CONFIG_SCRIPT)),)
 rel:: relx-rel
 
 relup:: relx-relup
@@ -30,8 +31,28 @@ distclean:: distclean-relx-rel
 
 # Plugin-specific targets.
 
+define relx_get_config.erl
+	(fun() ->
+		Config0 =
+			case file:consult("$(call core_native_path,$(RELX_CONFIG))") of
+				{ok, Terms} ->
+					Terms;
+				{error, _} ->
+					[]
+			end,
+		case filelib:is_file("$(call core_native_path,$(RELX_CONFIG_SCRIPT))") of
+			true ->
+				Bindings = erl_eval:add_binding('CONFIG', Config0, erl_eval:new_bindings()),
+				{ok, Config1} = file:script("$(call core_native_path,$(RELX_CONFIG_SCRIPT))", Bindings),
+				Config1;
+			false ->
+				Config0
+		end
+	end)()
+endef
+
 define relx_release.erl
-	{ok, Config} = file:consult("$(call core_native_path,$(RELX_CONFIG))"),
+	Config = $(call relx_get_config.erl),
 	{release, {Name, Vsn0}, _} = lists:keyfind(release, 1, Config),
 	Vsn = case Vsn0 of
 		{cmd, Cmd} -> os:cmd(Cmd);
@@ -46,7 +67,7 @@ define relx_release.erl
 endef
 
 define relx_tar.erl
-	{ok, Config} = file:consult("$(call core_native_path,$(RELX_CONFIG))"),
+	Config = $(call relx_get_config.erl),
 	{release, {Name, Vsn0}, _} = lists:keyfind(release, 1, Config),
 	Vsn = case Vsn0 of
 		{cmd, Cmd} -> os:cmd(Cmd);
@@ -61,7 +82,7 @@ define relx_tar.erl
 endef
 
 define relx_relup.erl
-	{ok, Config} = file:consult("$(call core_native_path,$(RELX_CONFIG))"),
+	Config = $(call relx_get_config.erl),
 	{release, {Name, Vsn0}, _} = lists:keyfind(release, 1, Config),
 	Vsn = case Vsn0 of
 		{cmd, Cmd} -> os:cmd(Cmd);
@@ -99,12 +120,12 @@ relx-post-rel::
 
 # Run target.
 
-ifeq ($(wildcard $(RELX_CONFIG)),)
+ifeq ($(wildcard $(RELX_CONFIG))$(wildcard $(RELX_CONFIG_SCRIPT)),)
 run::
 else
 
 define get_relx_release.erl
-	{ok, Config} = file:consult("$(call core_native_path,$(RELX_CONFIG))"),
+	Config = $(call relx_get_config.erl),
 	{release, {Name, Vsn0}, _} = lists:keyfind(release, 1, Config),
 	Vsn = case Vsn0 of
 		{cmd, Cmd} -> os:cmd(Cmd);

test/plugin_relx.mk

@@ -145,6 +145,99 @@ relx-post-rel: init
 	$i "Check that the output directory was removed entirely"
 	$t test ! -d $(APP)/_rel/
 
+relx-rel-with-script: init
+
+	$i "Bootstrap a new release named $(APP)"
+	$t mkdir $(APP)/
+	$t cp ../erlang.mk $(APP)/
+	$t $(MAKE) -C $(APP) -f erlang.mk bootstrap bootstrap-rel $v
+
+	$i "Create a relx.config.script file"
+	$t printf "%s\n" \
+		"{release, {App, _Ver}, Apps} = lists:keyfind(release, 1, CONFIG)," \
+		"lists:keyreplace(release, 1, CONFIG, {release, {App, \"ONE\"}, Apps})." \
+		> $(APP)/relx.config.script
+
+	$i "Build the release"
+	$t $(MAKE) -C $(APP) $v
+
+	$i "Check that the release was built"
+	$t test -d $(APP)/_rel
+	$t test -d $(APP)/_rel/$(APP)_release
+	$t test -d $(APP)/_rel/$(APP)_release/bin
+	$t test -d $(APP)/_rel/$(APP)_release/lib
+	$t test -d $(APP)/_rel/$(APP)_release/releases
+	$t test -d $(APP)/_rel/$(APP)_release/releases/ONE
+
+	$i "Clean the application"
+	$t $(MAKE) -C $(APP) clean $v
+
+	$i "Check that the release still exists"
+	$t test -d $(APP)/_rel
+	$t test -d $(APP)/_rel/$(APP)_release
+	$t test -d $(APP)/_rel/$(APP)_release/bin
+	$t test -d $(APP)/_rel/$(APP)_release/lib
+	$t test -d $(APP)/_rel/$(APP)_release/releases
+	$t test -d $(APP)/_rel/$(APP)_release/releases/ONE
+
+	$i "Distclean the application"
+	$t $(MAKE) -C $(APP) distclean $v
+
+	$i "Check that the output directory was removed entirely"
+	$t test ! -d $(APP)/_rel/
+
+define relx-rel-with-only-script-relx.config.script.erl
+endef
+
+relx-rel-with-script-only: init
+
+	$i "Bootstrap a new release named $(APP)"
+	$t mkdir $(APP)/
+	$t cp ../erlang.mk $(APP)/
+	$t $(MAKE) -C $(APP) -f erlang.mk bootstrap bootstrap-rel $v
+
+	$i "Delete relx.config and create a relx.config.script file"
+	$t rm -f $(APP)/relx.config
+	$t printf "%s\n" \
+		"CONFIG = [], %% Assert that config is empty." \
+		"[" \
+		"	{release, {$(APP)_release, \"ONE\"}, [$(APP), sasl, runtime_tools]}," \
+		"	{dev_mode, false}," \
+		"	{include_erts, true}," \
+		"	{extended_start_script, true}," \
+		"	{sys_config, \"config/sys.config\"}," \
+		"	{vm_args, \"config/vm.args\"}" \
+		"| CONFIG]." \
+		> $(APP)/relx.config.script
+
+	$i "Build the release"
+	$t $(MAKE) -C $(APP) $v
+
+	$i "Check that the release was built"
+	$t test -d $(APP)/_rel
+	$t test -d $(APP)/_rel/$(APP)_release
+	$t test -d $(APP)/_rel/$(APP)_release/bin
+	$t test -d $(APP)/_rel/$(APP)_release/lib
+	$t test -d $(APP)/_rel/$(APP)_release/releases
+	$t test -d $(APP)/_rel/$(APP)_release/releases/ONE
+
+	$i "Clean the application"
+	$t $(MAKE) -C $(APP) clean $v
+
+	$i "Check that the release still exists"
+	$t test -d $(APP)/_rel
+	$t test -d $(APP)/_rel/$(APP)_release
+	$t test -d $(APP)/_rel/$(APP)_release/bin
+	$t test -d $(APP)/_rel/$(APP)_release/lib
+	$t test -d $(APP)/_rel/$(APP)_release/releases
+	$t test -d $(APP)/_rel/$(APP)_release/releases/ONE
+
+	$i "Distclean the application"
+	$t $(MAKE) -C $(APP) distclean $v
+
+	$i "Check that the output directory was removed entirely"
+	$t test ! -d $(APP)/_rel/
+
 ifneq ($(PLATFORM),msys2)
 # This test is currently disabled on Windows because we are
 # running into too many issues preventing the test from