Add prepare_bundle_image script to construct the builtin cpio archive.

Change-Id: I4730bdb34f71523ee1e2db9fe11c4507ab060991

prepare_bundle_image.sh

diff --git a/prepare_bundle_image.sh b/prepare_bundle_image.sh
new file mode 100755
index 0000000..2cbd4ac
--- /dev/null
+++ b/prepare_bundle_image.sh
@@ -0,0 +1,80 @@
+#! /bin/bash
+
+# Script for preparing a cpio archive of builtin applications and/or models.
+# Usage: prepare_bundle_image [-n] -o target.cpio
+#                   [-m input_model...] [-a input_app...]
+# where
+#   -o target cpio archive filena,me
+#   -m identifies subsequent arguments as models
+#   -a identifies subsequent arguments as applications
+# also
+#   -n do a dry-run where commands are just echo'd to the terminal
+
+# TODO(sleffler): redo with getopt
+
+if [[ -z "${ROOTDIR}" ]]; then
+    echo "No ROOTDIR, source build/setup.sh first"
+    exit 1
+fi
+if [[ -z "${KATA_RUST_VERSION}" ]]; then
+    echo "No KATA_RUST_VERSION, source build/setup.sh first"
+    exit 1
+fi
+if [[ -z "${CARGO_HOME}" ]]; then
+    echo "No CARGO_HOME, source build/setup.sh first"
+    exit 1
+fi
+
+TMP_DIR="${OUT}/tmp"
+if [[ ! -d "${TMP_DIR}" ]]; then
+    echo "No tmp directory found at ${TMP_DIR}"
+    exit 2
+fi
+
+CARGO="${CARGO_HOME}/bin/cargo +${KATA_RUST_VERSION}"
+CPIO_OPTS='-H newc -L --no-absolute-filenames --reproducible --owner=root:root'
+
+function prepare_bundle_image {
+    cd "${ROOTDIR}/kata/tools/seL4/misc/prepare_bundle_image" && \
+        ${CARGO} run -q  --target-dir "${OUT}/host/prepare_bundle_image" -- "$@"
+}
+
+dry_run='false'
+if [[ "$1" == '-n' ]]; then
+    dry_run='true'
+    shift
+fi
+if [[ "$1" != '-o' ]]; then
+    echo "Missing -o option to specify output cpio archive"
+    exit 3
+fi
+OUTPUT_CPIO="$2"
+shift 2
+
+APPS='-a'
+MODELS='-m'
+file_type=
+for arg; do
+    case "${arg}" in
+    -a) file_type='app';;
+    -m) file_type='model';;
+     *) case "${file_type}" in
+        app)
+            ln -sf "${arg}" "${TMP_DIR}" && \
+                APPS="${APPS} ${TMP_DIR}/$(basename ${arg})"
+            ;;
+        model)
+            ln -sf "${arg}" "${TMP_DIR}" && \
+                MODELS="${MODELS} ${TMP_DIR}/$(basename ${arg})"
+            ;;
+        *) echo 'Missing -m or -a option to identify file type'; exit -1;;
+        esac
+    esac
+done
+
+if [[ "${dry_run}" == 'true' ]]; then
+    # TODO(sleffler): would be nice to print what prepare_bundle_image would do
+    echo "prepare_bundle_image ${MODELS} ${APPS} | cpio -o -D ${TMP_DIR} ${CPIO_OPTS} -O ${OUTPUT_CPIO}"
+else
+    prepare_bundle_image ${MODELS} ${APPS} | cpio -o -D ${TMP_DIR} ${CPIO_OPTS} -O "${OUTPUT_CPIO}"
+fi