diskimage-builder/elements/ubuntu/root.d/10-cache-ubuntu-tarball
Clint Byrum cc4b23aafa Namespace SHA256SUMS file to distro/release/arch
Its possible other images will want to use the same filename

Change-Id: Iae393bfc71205d39e2bc6e12f5524824607d6101
2013-02-27 20:30:14 -08:00

28 lines
987 B
Bash
Executable File

#!/bin/bash
# These are useful, or at worst not harmful, for all images we build.
set -e
[ -n "$ARCH" ]
[ -n "$TARGET_ROOT" ]
IMG_PATH=~/.cache/image-create
CLOUD_IMAGES=${CLOUD_IMAGES:-http://cloud-images.ubuntu.com/}
RELEASE=${RELEASE:-quantal}
BASE_IMAGE_FILE=${BASE_IMAGE_FILE:-$RELEASE-server-cloudimg-$ARCH-root.tar.gz}
SHA256SUMS=${SHA256SUMS:-https://cloud-images.ubuntu.com/$RELEASE/current/SHA256SUMS}
mkdir -p $IMG_PATH
# TODO: don't cache -current forever.
if [ ! -f $IMG_PATH/$BASE_IMAGE_FILE ] ; then
echo "Fetching Base Image"
wget $SHA256SUMS -O $IMG_PATH/SHA256SUMS.ubuntu.$RELEASE.$ARCH
wget $CLOUD_IMAGES/$RELEASE/current/$BASE_IMAGE_FILE -O $IMG_PATH/$BASE_IMAGE_FILE.tmp
pushd $IMG_PATH
awk "/$BASE_IMAGE_FILE/ { print \$0 \".tmp\" }" SHA256SUMS.ubuntu.$RELEASE.$ARCH | sha256sum --check -
popd
mv $IMG_PATH/$BASE_IMAGE_FILE.tmp $IMG_PATH/$BASE_IMAGE_FILE
fi
# Extract the base image
sudo tar -C $TARGET_ROOT -xzf $IMG_PATH/$BASE_IMAGE_FILE