Create temporary directory when generating relx

plugins/relx.mk

@@ -39,6 +39,7 @@ distclean:: distclean-relx-rel
 # Plugin-specific targets.
 
 $(RELX):
+	$(verbose) mkdir -p $(ERLANG_MK_TMP)
 	$(gen_verbose) $(call core_http_get,$(RELX),$(RELX_URL))
 	$(verbose) chmod +x $(RELX)
 

test/plugin_relx.mk

@@ -3,7 +3,7 @@
 # Sleeps when interacting with relx script are necessary after start and upgrade
 # as both of those interactions are not synchronized.
 
-RELX_CASES = rel relup start-stop tar vsn
+RELX_CASES = rel bare-rel relup start-stop tar vsn
 RELX_TARGETS = $(addprefix relx-,$(RELX_CASES))
 
 .PHONY: relx $(RELX_TARGETS)
@@ -54,6 +54,27 @@ relx-rel: build clean
 	$i "Check that the output directory was removed entirely"
 	$t test ! -d $(APP)/_rel/
 
+relx-bare-rel: build clean
+
+	$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 "Build the release"
+	$t $(MAKE) -C $(APP) rel $v
+
+	$i "Check that relx was downloaded"
+	$t test -f $(APP)/.erlang.mk/relx
+
+	$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/1
+
 relx-relup: build clean
 
 	$i "Bootstrap a new release named $(APP)"