Import vagrant-libvirt's create_box.sh script

It's not included in vagrant-libvirt 0.1.2-1 anymore.

refs #17872

vagrant/definitions/tails-builder/create_box.sh

+#!/usr/bin/env bash
+#set -xu
+
+# Imported from https://github.com/vagrant-libvirt/vagrant-libvirt
+# at commit dda5d4e1c467017c773639f0cc3df3a78898ae0b:
+#
+# Copyright (c) 2013 Lukas Stanek
+# 
+# MIT License
+# 
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+# 
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+# 
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+error() {
+    local msg="${1}"
+    echo "==> ERROR: ${msg}"
+    exit 1
+}
+
+usage() {
+    echo "Usage: ${0} IMAGE [BOX] [Vagrantfile.add]"
+    echo
+    echo "Package a qcow2 image into a vagrant-libvirt reusable box"
+}
+
+# Print the image's backing file
+backing(){
+    local img=${1}
+    qemu-img info "$img" | grep 'backing file:' | cut -d ':' -f2
+}
+
+# Rebase the image
+rebase(){
+    local img=${1}
+    qemu-img rebase -p -b "" "$img"
+    [[ "$?" -ne 0 ]] && error "Error during rebase"
+}
+
+# Is absolute path
+isabspath(){
+    local path=${1}
+    [[ "$path" =~ ^/.* ]]
+}
+
+if [ -z "$1" ] || [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
+    usage
+    exit 1
+fi
+
+IMG=$(readlink -e "$1")
+[[ "$?" -ne 0 ]] && error "'$1': No such image"
+
+IMG_DIR=$(dirname "$IMG")
+IMG_BASENAME=$(basename "$IMG")
+
+BOX=${2:-}
+# If no box name is supplied infer one from image name
+if [[ -z "$BOX" ]]; then
+    BOX_NAME=${IMG_BASENAME%.*}
+    BOX=$BOX_NAME.box
+else
+    BOX_NAME=$(basename "${BOX%.*}")
+fi
+
+[[ -f "$BOX" ]] && error "'$BOX': Already exists"
+
+CWD=$(pwd)
+TMP_DIR="$CWD/_tmp_package"
+TMP_IMG="$TMP_DIR/box.img"
+
+mkdir -p "$TMP_DIR"
+
+[[ ! -r "$IMG" ]] && error "'$IMG': Permission denied"
+
+if [ -n "$3" ] && [ -r "$3" ]; then
+  VAGRANTFILE_ADD="$(cat $3)"
+fi
+
+# We move / copy (when the image has master) the image to the tempdir
+# ensure that it's moved back / removed again
+if [[ -n $(backing "$IMG") ]]; then
+    echo "==> Image has backing image, copying image and rebasing ..."
+    trap "rm -rf $TMP_DIR" EXIT
+    cp "$IMG" "$TMP_IMG"
+    rebase "$TMP_IMG"
+else
+    if fuser -s "$IMG"; then
+        error "Image '$IMG_BASENAME' is used by another process"
+    fi
+
+    # move the image to get a speed-up and use less space on disk
+    trap 'mv "$TMP_IMG" "$IMG"; rm -rf "$TMP_DIR"' EXIT
+    mv "$IMG" "$TMP_IMG"
+fi
+
+cd "$TMP_DIR"
+
+#Using the awk int function here to truncate the virtual image size to an
+#integer since the fog-libvirt library does not seem to properly handle
+#floating point.
+IMG_SIZE=$(qemu-img info --output=json "$TMP_IMG" | awk '/virtual-size/{s=int($2)/(1024^3); print (s == int(s)) ? s : int(s)+1 }')
+
+echo "{$IMG_SIZE}"
+
+cat > metadata.json <<EOF
+{
+    "provider": "libvirt",
+    "format": "qcow2",
+    "virtual_size": ${IMG_SIZE}
+}
+EOF
+
+cat > Vagrantfile <<EOF
+Vagrant.configure("2") do |config|
+
+  config.vm.provider :libvirt do |libvirt|
+
+    libvirt.driver = "kvm"
+    libvirt.host = ""
+    libvirt.connect_via_ssh = false
+    libvirt.storage_pool_name = "default"
+
+  end
+
+${VAGRANTFILE_ADD:-}
+end
+EOF
+
+echo "==> Creating box, tarring and gzipping"
+
+if type pigz >/dev/null 2>/dev/null; then
+  GZ="pigz"
+else
+  GZ="gzip"
+fi
+tar cv -S --totals ./metadata.json ./Vagrantfile ./box.img | $GZ -c > "$BOX"
+
+# if box is in tmpdir move it to CWD before removing tmpdir
+if ! isabspath "$BOX"; then
+    mv "$BOX" "$CWD"
+fi
+
+echo "==> ${BOX} created"
+echo "==> You can now add the box:"
+echo "==>   'vagrant box add ${BOX} --name ${BOX_NAME}'"