From 1b89084f33619bc55e2997cc6f1c6656975f25de Mon Sep 17 00:00:00 2001
From: Joseph Lenox <lenox.joseph@gmail.com>
Date: Sat, 4 Mar 2017 22:16:30 -0800
Subject: [PATCH] Rearranged comments and added guard to ensure only one
 parameter is given.

---
 package/osx/make_dmg.sh | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/package/osx/make_dmg.sh b/package/osx/make_dmg.sh
index b2f2c86d0..8f2b66922 100755
--- a/package/osx/make_dmg.sh
+++ b/package/osx/make_dmg.sh
@@ -1,10 +1,17 @@
 #!/bin/bash
 
 # Assembles an installation bundle from a built copy of Slic3r.
-# Required environment variables:
+# Requires PAR::Packer to be installed for the version of
+# perl copied.
 # Adapted from script written by bubnikv for Prusa3D.
+# Required environment variables:
 # SLIC3R_VERSION - x.x.x format
 
+if [ "$#" -ne 1 ]; then
+    echo "Usage: $(basename $0) dmg_name"
+    exit 1;
+fi
+
 WD=$(dirname $0)
 # Determine if this is a tagged (release) commit.
 # Change the build id accordingly.