initrd.sh: improved error handling

1 files changed, 7 insertions, 3 deletions

diff --git a/src/initrd.sh b/src/initrd.sh
index 3c692f8..5bf19cf 100755
--- a/src/initrd.sh
+++ b/src/initrd.sh
@@ -16,8 +16,14 @@ get_kernel_version()
         (read _ a; echo ${a#linux-image-})
 }
 
+pkgs_file=rootfs/_build/${rootfs:-samizdat}.pkgs.txt
+
+[ -f "$pkgs_file" ] || exit
+
 kernel_version=$(get_kernel_version rootfs/_build/${rootfs:-samizdat}.pkgs.txt)
 
+[ "$kernel_version" ] || exit
+
 debian_initrd=/boot/initrd.img-${kernel_version}
 
 find_deps() {
@@ -40,14 +46,12 @@ rebuild()
     /usr/sbin/mkinitramfs -d "$conf_dir" -o "$initrd" "${kernel_version}" || force_rebuild
 }
 
-[ "$kernel_version" ]
-
 if [ ! -e "$initrd" -o ! -e "$vmlinuz" ]; then
     rebuild
 else
     found=$(find_deps -newer "$initrd" -print -quit)
     if [ "$found" ]; then
-        echo "initrd.sh: rebuild forced: found modified source: $found"
+        echo "initrd.sh: rebuild forced: found modified source: $found" >&2
         rebuild
     fi
 fi