69 lines
2.5 KiB
Bash
Executable file
69 lines
2.5 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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if [ ${DIB_DEBUG_TRACE:-1} -gt 0 ]; then
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set -x
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fi
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set -eu
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set -o pipefail
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[ -n "$ARCH" ]
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[ -n "$TARGET_ROOT" ]
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shopt -s extglob
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DIB_RELEASE=${DIB_RELEASE:-trusty}
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DIB_CLOUD_IMAGES=${DIB_CLOUD_IMAGES:-https://cloud-images.ubuntu.com/$DIB_RELEASE/current}
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if [ $DIB_RELEASE != "trusty" ] ; then
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BASE_IMAGE_FILE=${BASE_IMAGE_FILE:-$DIB_RELEASE-server-cloudimg-$ARCH.squashfs}
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else
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BASE_IMAGE_FILE=${BASE_IMAGE_FILE:-$DIB_RELEASE-server-cloudimg-$ARCH-root.tar.gz}
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fi
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SHA256SUMS=${SHA256SUMS:-https://${DIB_CLOUD_IMAGES##http?(s)://}/SHA256SUMS}
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CACHED_FILE=$DIB_IMAGE_CACHE/$BASE_IMAGE_FILE
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CACHED_FILE_LOCK=$DIB_LOCKFILES/$BASE_IMAGE_FILE.lock
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CACHED_SUMS=$DIB_IMAGE_CACHE/SHA256SUMS.ubuntu.$DIB_RELEASE.$ARCH
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function get_ubuntu_tarball() {
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if [ -n "$DIB_LOCAL_IMAGE" ] ; then
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echo "Using local image without download"
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if [ ! -f "$DIB_LOCAL_IMAGE" ] ; then
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echo "Unable to find image $DIB_LOCAL_IMAGE locally! Check path and file name to source image"
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exit 1
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fi
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IMAGE_PATH=$DIB_LOCAL_IMAGE
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else
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if [ -n "$DIB_OFFLINE" -a -f "$CACHED_FILE" ] ; then
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echo "Not checking freshness of cached $CACHED_FILE."
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else
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echo "Fetching Base Image"
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$TMP_HOOKS_PATH/bin/cache-url $SHA256SUMS $CACHED_SUMS
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$TMP_HOOKS_PATH/bin/cache-url \
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$DIB_CLOUD_IMAGES/$BASE_IMAGE_FILE $CACHED_FILE
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pushd $DIB_IMAGE_CACHE
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if ! grep "$BASE_IMAGE_FILE" $CACHED_SUMS | sha256sum --check - ; then
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$TMP_HOOKS_PATH/bin/cache-url -f \
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$DIB_CLOUD_IMAGES/$BASE_IMAGE_FILE $CACHED_FILE
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grep "$BASE_IMAGE_FILE" $CACHED_SUMS | sha256sum --check -
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fi
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fi
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IMAGE_PATH=$DIB_IMAGE_CACHE/$BASE_IMAGE_FILE
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fi
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# Extract the base image (use --numeric-owner to avoid UID/GID mismatch between
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# image tarball and host OS e.g. when building Ubuntu image on an openSUSE host)
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if [ "$DIB_RELEASE" != "trusty" ] ; then
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sudo unsquashfs -f -d $TARGET_ROOT $IMAGE_PATH
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else
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sudo tar -C $TARGET_ROOT --numeric-owner -xzf $IMAGE_PATH
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fi
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}
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(
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echo "Getting $CACHED_FILE_LOCK: $(date)"
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# Wait up to 20 minutes for another process to download
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if ! flock -w 1200 9 ; then
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echo "Did not get $CACHED_FILE_LOCK: $(date)"
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exit 1
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fi
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get_ubuntu_tarball
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) 9> $CACHED_FILE_LOCK
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