[ostree] gnomeos-make-image.sh: Check for some dependencies before we run

[Colin Walters <walters src gnome org>]

commit 6f00173ff2c5bba45aca9ef3ace23d509b71d47c
Author: Colin Walters <walters verbum org>
Date:   Wed Oct 26 14:59:45 2011 -0400

    gnomeos-make-image.sh: Check for some dependencies before we run

 parallel-debian/gnomeos-make-image.sh |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/parallel-debian/gnomeos-make-image.sh b/parallel-debian/gnomeos-make-image.sh
index 1fc37ab..84fe38e 100755
--- a/parallel-debian/gnomeos-make-image.sh
+++ b/parallel-debian/gnomeos-make-image.sh
@@ -24,6 +24,15 @@ set -x
 SRCDIR=`dirname $0`
 WORKDIR=`pwd`
 
+DEPENDS="debootstrap qemu-img"
+
+for x in $DEPENDS; do
+    if ! command -v $x; then
+        echo "Couldn't find required dependency $x";
+        exit 1
+    fi
+done
+
 OSTREE=${OSTREE:-ostree}
 
 case `uname -p` in