Add replace-di-banner.sh example hook to replace the graphical d-i banner.

examples/hooks/replace-di-banner.sh

@@ -0,0 +1,27 @@
+#!/bin/sh
+
+# This is an binary hook for live-helper(7) to overwrite the banner
+# in the graphical Debian Installer. To enable it, coppy or symlink
+# this hook into your config/binary_local-hooks directory and add a
+# replacement banner.png at:
+# 
+#  config/binary_local-includes/binary/install/banner.png
+#
+# The file should be a PNG image of dimensions 800 x 75.
+
+set -e
+
+TARGET_INITRD="binary/install/gtk/initrd.gz"
+REPACK_TMPDIR="unpacked-initrd"
+
+# cpio does not have a "extract to directory", so we must change directory
+mkdir -p ${REPACK_TMPDIR}
+cd ${REPACK_TMPDIR}
+gzip -d < ../${TARGET_INITRD} | cpio -i --make-directories --no-absolute-filenames
+
+# Overwrite banner
+mv ../binary/install/banner.png ./usr/share/graphics/logo_debian.png
+
+find | cpio -H newc -o | gzip -9 > ../${TARGET_INITRD}
+cd ..
+rm -rf ${REPACK_TMPDIR}