60a1405eef
This also switches to using curl which some people may not have installed. However, curl is far superior for this type of download. Change-Id: I7ac5a84b30eb8daad320c082f976931c41a24669
46 lines
1.4 KiB
Bash
Executable File
46 lines
1.4 KiB
Bash
Executable File
#!/bin/bash
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# These are useful, or at worst not harmful, for all images we build.
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set -e
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[ -n "$ARCH" ]
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[ -n "$TARGET_ROOT" ]
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shopt -s extglob
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IMG_PATH=~/.cache/image-create
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DIB_CLOUD_IMAGES=${DIB_CLOUD_IMAGES:-http://cloud-images.ubuntu.com/}
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DIB_RELEASE=${DIB_RELEASE:-quantal}
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BASE_IMAGE_FILE=${BASE_IMAGE_FILE:-$DIB_RELEASE-server-cloudimg-$ARCH-root.tar.gz}
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SHA256SUMS=${SHA256SUMS:-https://${DIB_CLOUD_IMAGES##http?(s)://}/$DIB_RELEASE/current/SHA256SUMS}
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cache_url()
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{
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local url=$1
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local dest=$2
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local tmp=$(mktemp $(dirname $dest)/.download.XXXXXXXX)
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rcode=$(curl -o $tmp -z $dest -w '%{http_code}' $url)
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if [ "$rcode" == "200" ] ; then
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echo "Server copy has changed. Using server version of $url"
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mv $tmp $dest
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elif [ "$rcode" == "304" ] ; then
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echo "Server copy has not changed. Using locally cached $url"
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rm -f $tmp
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else
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echo "Server returned an unexpected response code. [$rcode]"
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rm -f $tmp
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return 1
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fi
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}
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mkdir -p $IMG_PATH
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echo "Fetching Base Image"
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cache_url $SHA256SUMS $IMG_PATH/SHA256SUMS.ubuntu.$DIB_RELEASE.$ARCH
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cache_url $DIB_CLOUD_IMAGES/$DIB_RELEASE/current/$BASE_IMAGE_FILE $IMG_PATH/$BASE_IMAGE_FILE
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pushd $IMG_PATH
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grep "$BASE_IMAGE_FILE" SHA256SUMS.ubuntu.$DIB_RELEASE.$ARCH | sha256sum --check -
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popd
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# Extract the base image
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sudo tar -C $TARGET_ROOT -xzf $IMG_PATH/$BASE_IMAGE_FILE
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sudo rmdir $TARGET_ROOT/lost+found
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