[ostree] image: Use rev-parse, not HEAD

[Colin Walters <walters src gnome org>]

commit cb04d99b7656900cf0ab9bcee34e02b228e5976b
Author: Colin Walters <walters verbum org>
Date:   Thu Oct 27 15:44:21 2011 -0400

    image: Use rev-parse, not HEAD

 parallel-debian/gnomeos-make-image.sh |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/parallel-debian/gnomeos-make-image.sh b/parallel-debian/gnomeos-make-image.sh
index 190c77c..a159143 100755
--- a/parallel-debian/gnomeos-make-image.sh
+++ b/parallel-debian/gnomeos-make-image.sh
@@ -148,10 +148,11 @@ if ! test -d ${OBJ}; then
         (cd ostree/gnomeos-origin; $OSTREE commit -s 'Add chroot_break' --repo=../repo --add=sbin/chroot_break)
 
         (cd ostree;
-            rev=`cat repo/HEAD`
-            $OSTREE checkout --repo=repo HEAD gnomeos-${rev}
+            rev=$($OSTREE rev-parse --repo=repo master)
+            $OSTREE checkout --repo=repo ${rev} gnomeos-${rev}
             $OSTREE run-triggers --repo=repo gnomeos-${rev}
-            ln -s gnomeos-${rev} current)
+            ln -s gnomeos-${rev} current
+            rm -rf gnomeos-origin)
     )
     if test -d ${OBJ}; then
         mv ${OBJ} ${OBJ}.old