fedora: improve error handling

Make sure that all partitions got unmounted.

qubeize_image

@@ -48,13 +48,13 @@ export IMG=qubeized_images/$NAME-root.img
 echo "--> Copying $CLEANIMG to $IMG..."
 cp $CLEANIMG $IMG || exit 1
 
-echo "--> Mouting $IMG"
+echo "--> Mounting $IMG"
 
 mkdir -p mnt
 mount -o loop $IMG mnt || exit 1
 export INSTALLDIR=mnt
 
-$SCRIPTSDIR/04_install_qubes.sh || exit 1
+$SCRIPTSDIR/04_install_qubes.sh || { umount $INSTALLDIR; exit 1; }
 
 echo "--> Copying the Apps Menu shortcuts..."
 export APPSORIG=qubeized_images/$NAME-apps.orig

scripts_fedora/04_install_qubes.sh

@@ -2,12 +2,14 @@
 echo "--> Preparing environment..."
 mount -t proc proc $PWD/mnt/proc
 
+trap "umount $PWD/mnt/proc" EXIT
+
+export YUM0=$PWD/yum_repo_qubes
 if [ "$TEMPLATE_FLAVOR" == "minimal" ]; then
     YUM_OPTS="$YUM_OPTS --group_package_types=mandatory"
 fi
 
 echo "--> Installing RPMs..."
-export YUM0=$PWD/yum_repo_qubes
 yum install -c $PWD/yum.conf $YUM_OPTS -y --installroot=$(pwd)/mnt @qubes-vm || RETCODE=1
 
 rpm --root=$PWD/mnt --import $PWD/mnt/etc/pki/rpm-gpg/RPM-GPG-KEY-qubes-*
@@ -17,6 +19,4 @@ if [ "$TEMPLATE_FLAVOR" != "minimal" ]; then
     $SCRIPTSDIR/add_3rd_party_software.sh || RETCODE=1
 fi
 
-umount $PWD/mnt/proc
-
 exit $RETCODE