From 8c437e518b33ba88edcf0d2c0be0cf6a4d135b8c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Reinhard=20N=C3=A4gele?= <reinhard.naegele@codecentric.de>
Date: Fri, 28 Apr 2017 13:30:38 +0200
Subject: [PATCH] Update Makefile to require Mercurial

---
 Makefile | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Makefile b/Makefile
index 5ef44b222..d9d869a3b 100644
--- a/Makefile
+++ b/Makefile
@@ -104,6 +104,7 @@ coverage:
 HAS_GLIDE := $(shell command -v glide;)
 HAS_GOX := $(shell command -v gox;)
 HAS_GIT := $(shell command -v git;)
+HAS_HG := $(shell command -v hg;)
 
 .PHONY: bootstrap
 bootstrap:
@@ -116,6 +117,9 @@ endif
 
 ifndef HAS_GIT
 	$(error You must install Git)
+endif
+ifndef HAS_HG
+	$(error You must install Mercurial)
 endif
 	glide install --strip-vendor
 	go build -o bin/protoc-gen-go ./vendor/github.com/golang/protobuf/protoc-gen-go