Better handle ERLANG_OTP and ERLANG_HIPE

A release that gets removed in a ci:: preceding the running
of CI rules would end up not rebuilding it due to how a
warning was silenced when using ERLANG_OTP.

core/kerl.mk

@@ -21,20 +21,20 @@ KERL_MAKEFLAGS ?=
 OTP_GIT ?= https://github.com/erlang/otp
 
 define kerl_otp_target
-ifeq ($(wildcard $(KERL_INSTALL_DIR)/$(1)),)
 $(KERL_INSTALL_DIR)/$(1): $(KERL)
-	MAKEFLAGS="$(KERL_MAKEFLAGS)" $(KERL) build git $(OTP_GIT) $(1) $(1)
-	$(KERL) install $(1) $(KERL_INSTALL_DIR)/$(1)
-endif
+	$(verbose) if [ ! -d $$@ ]; then \
+		MAKEFLAGS="$(KERL_MAKEFLAGS)" $(KERL) build git $(OTP_GIT) $(1) $(1); \
+		$(KERL) install $(1) $(KERL_INSTALL_DIR)/$(1); \
+	fi
 endef
 
 define kerl_hipe_target
-ifeq ($(wildcard $(KERL_INSTALL_DIR)/$1-native),)
 $(KERL_INSTALL_DIR)/$1-native: $(KERL)
-	KERL_CONFIGURE_OPTIONS=--enable-native-libs \
-		MAKEFLAGS="$(KERL_MAKEFLAGS)" $(KERL) build git $(OTP_GIT) $1 $1-native
-	$(KERL) install $1-native $(KERL_INSTALL_DIR)/$1-native
-endif
+	$(verbose) if [ ! -d $$@ ]; then \
+		KERL_CONFIGURE_OPTIONS=--enable-native-libs \
+			MAKEFLAGS="$(KERL_MAKEFLAGS)" $(KERL) build git $(OTP_GIT) $1 $1-native; \
+		$(KERL) install $1-native $(KERL_INSTALL_DIR)/$1-native; \
+	fi
 endef
 
 $(KERL): $(KERL_DIR)

plugins/ci.mk

@@ -46,8 +46,8 @@ $(foreach otp,$(CI_OTP),$(eval $(call ci_target,$(otp),$(otp),otp)))
 $(foreach otp,$(CI_HIPE),$(eval $(call ci_target,$(otp)-native,$(otp)-native,native)))
 $(foreach otp,$(CI_ERLLVM),$(eval $(call ci_target,$(otp)-erllvm,$(otp)-native,erllvm)))
 
-$(foreach otp,$(CI_OTP),$(eval $(call kerl_otp_target,$(otp))))
-$(foreach otp,$(sort $(CI_HIPE) $(CI_ERLLLVM)),$(eval $(call kerl_hipe_target,$(otp))))
+$(foreach otp,$(filter-out $(ERLANG_OTP),$(CI_OTP)),$(eval $(call kerl_otp_target,$(otp))))
+$(foreach otp,$(filter-out $(ERLANG_HIPE),$(sort $(CI_HIPE) $(CI_ERLLLVM))),$(eval $(call kerl_hipe_target,$(otp))))
 
 help::
 	$(verbose) printf "%s\n" "" \