From 749a7d0e4f9da13f238062ae0417e68128c589fd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=B4me=20Petazzoni?= <jp@enix.org>
Date: Fri, 9 Aug 2013 17:43:02 -0700
Subject: [PATCH] Add a check to make sure that make.sh only runs within a
 container.

---
 make.sh | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/make.sh b/make.sh
index 411271895b..63bb31bdb5 100755
--- a/make.sh
+++ b/make.sh
@@ -21,6 +21,16 @@
 set -e
 set -x
 
+# We're a nice, sexy, little shell script, and people might try to run us;
+# but really, they shouldn't. We want to be in a container!
+RESOLVCONF=$(readlink --canonicalize /etc/resolv.conf)
+grep -q "$RESOLVCONF" /proc/mounts || {
+	echo "# I will only run within a container."
+	echo "# Try this instead:"
+	echo "docker build ."
+	exit 1
+}
+
 VERSION=$(cat ./VERSION)
 GIT_COMMIT=$(git rev-parse --short HEAD)
 GIT_CHANGES=$(test -n "$(git status --porcelain)" && echo "+CHANGES" || true)