From c20251fa40ce7dc59d1d7f875f2867ea410ebbc1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-S=C3=A9bastien=20P=C3=A9dron?=
 <jean-sebastien@rabbitmq.com>
Date: Tue, 8 Sep 2015 11:02:34 +0200
Subject: core.mk: Allow to take erlang.mk from an alternate Git repository

---
 core/core.mk | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'core')

diff --git a/core/core.mk b/core/core.mk
index f5ada0b..a41a240 100644
--- a/core/core.mk
+++ b/core/core.mk
@@ -173,13 +173,15 @@ core_ls = $(filter-out $(1),$(shell echo $(1)))
 
 # Automated update.
 
+ERLANG_MK_REPO ?= https://github.com/ninenines/erlang.mk
+ERLANG_MK_COMMIT ?=
 ERLANG_MK_BUILD_CONFIG ?= build.config
 ERLANG_MK_BUILD_DIR ?= .erlang.mk.build
 
 erlang-mk:
-	git clone https://github.com/ninenines/erlang.mk $(ERLANG_MK_BUILD_DIR)
+	git clone $(ERLANG_MK_REPO) $(ERLANG_MK_BUILD_DIR)
 	if [ -f $(ERLANG_MK_BUILD_CONFIG) ]; then cp $(ERLANG_MK_BUILD_CONFIG) $(ERLANG_MK_BUILD_DIR)/build.config; fi
-	cd $(ERLANG_MK_BUILD_DIR) && $(MAKE)
+	cd $(ERLANG_MK_BUILD_DIR) && $(if $(ERLANG_MK_COMMIT),git checkout $(ERLANG_MK_COMMIT) &&) $(MAKE)
 	cp $(ERLANG_MK_BUILD_DIR)/erlang.mk ./erlang.mk
 	rm -rf $(ERLANG_MK_BUILD_DIR)
 
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