Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 73 insertions, 0 deletions

diff --git a/scripts/archive-source.sh b/scripts/archive-source.sh
new file mode 100755
index 000000000..c6169db69
--- /dev/null
+++ b/scripts/archive-source.sh
@@ -0,0 +1,73 @@
+#!/bin/bash
+#
+# Author: Fam Zheng <famz@redhat.com>
+#
+# Archive source tree, including submodules. This is created for test code to
+# export the source files, in order to be built in a different environment,
+# such as in a docker instance or VM.
+#
+# This code is licensed under the GPL version 2 or later.  See
+# the COPYING file in the top-level directory.
+
+error() {
+    printf %s\\n "$*" >&2
+    exit 1
+}
+
+if test $# -lt 1; then
+    error "Usage: $0 <output tarball>"
+fi
+
+tar_file=$(realpath "$1")
+sub_tdir=$(mktemp -d "${tar_file%.tar}.sub.XXXXXXXX")
+sub_file="${sub_tdir}/submodule.tar"
+
+# We want a predictable list of submodules for builds, that is
+# independent of what the developer currently has initialized
+# in their checkout, because the build environment is completely
+# different to the host OS.
+submodules="dtc slirp meson ui/keycodemapdb"
+submodules="$submodules tests/fp/berkeley-softfloat-3 tests/fp/berkeley-testfloat-3"
+sub_deinit=""
+
+function cleanup() {
+    local status=$?
+    rm -rf "$sub_tdir"
+    if test "$sub_deinit" != ""; then
+        git submodule deinit $sub_deinit
+    fi
+    exit $status
+}
+trap "cleanup" 0 1 2 3 15
+
+function tree_ish() {
+    local retval='HEAD'
+    if ! git diff-index --quiet --ignore-submodules=all HEAD -- &>/dev/null
+    then
+        retval=$(git stash create)
+    fi
+    echo "$retval"
+}
+
+git archive --format tar "$(tree_ish)" > "$tar_file"
+test $? -ne 0 && error "failed to archive qemu"
+for sm in $submodules; do
+    status="$(git submodule status "$sm")"
+    smhash="${status#[ +-]}"
+    smhash="${smhash%% *}"
+    case "$status" in
+        -*)
+            sub_deinit="$sub_deinit $sm"
+            git submodule update --init "$sm"
+            test $? -ne 0 && error "failed to update submodule $sm"
+            ;;
+        +*)
+            echo "WARNING: submodule $sm is out of sync"
+            ;;
+    esac
+    (cd $sm; git archive --format tar --prefix "$sm/" $(tree_ish)) > "$sub_file"
+    test $? -ne 0 && error "failed to archive submodule $sm ($smhash)"
+    tar --concatenate --file "$tar_file" "$sub_file"
+    test $? -ne 0 && error "failed append submodule $sm to $tar_file"
+done
+exit 0