diskimage-builder/diskimage_builder/elements/opensuse/root.d/10-opensuse-cloud-image
Ian Wienand 97c01e48ed Move elements & lib relative to diskimage_builder package
Currently we have all our elements and library files in a top-level
directory and install them into
<root>/share/diskimage-builder/[elements|lib] (where root is either /
or the root of a virtualenv).

The problem with this is that editable/development installs (pip -e)
do *not* install data_files.  Thus we have no canonical location to
look for elements -- leading to the various odd things we do such as a
whole bunch of guessing at the top of disk-image-create and having a
special test-loader in tests/test_elements.py so we can run python
unit tests on those elements that have it.

data_files is really the wrong thing to use for what are essentially
assets of the program.  data_files install works well for things like
config-files, init.d files or dropping documentation files.

By moving the elements under the diskimage_builder package, we always
know where they are relative to where we import from.  In fact,
pkg_resources has an api for this which we wrap in the new
diskimage_builder/paths.py helper [1].

We use this helper to find the correct path in the couple of places we
need to find the base-elements dir, and for the paths to import the
library shell functions.

Elements such as svc-map and pkg-map include python unit-tests, which
we do not need tests/test_elements.py to special-case load any more.
They just get found automatically by the normal subunit loader.

I have a follow-on change (I69ca3d26fede0506a6353c077c69f735c8d84d28)
to move disk-image-create to a regular python entry-point.

Unfortunately, this has to move to work with setuptools.  You'd think
a symlink under diskimage_builder/[elements|lib] would work, but it
doesn't.

[1] this API handles stuff like getting files out of .zip archive
modules, which we don't do.  Essentially for us it's returning
__file__.

Change-Id: I5e3e3c97f385b1a4ff2031a161a55b231895df5b
2016-11-01 17:27:41 -07:00

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#!/bin/bash
if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
set -x
fi
set -eu
set -o pipefail
[ -n "$ARCH" ]
[ -n "$TARGET_ROOT" ]
if [ 'amd64' = "$ARCH" ] ; then
ARCH="x86_64"
fi
if ! [ 'x86_64' = "$ARCH" ] ; then
echo "Only x86_64 images are currently available but ARCH is set to $ARCH."
exit 1
fi
# Set some image defaults
case ${DIB_RELEASE} in
# Old openSUSE releases
13*)
OPENSUSE_IMAGE_BASEDIR=openSUSE
OPENSUSE_IMAGE_FILE=openSUSE-${DIB_RELEASE}-OS
;;
# New Leap releases
42*)
OPENSUSE_IMAGE_BASEDIR=Leap
OPENSUSE_IMAGE_FILE=openSUSE-Leap-${DIB_RELEASE}-OpenStack
;;
# We handle unknown cases in environment.d/10-opensuse-distro-name.bash
esac
# NOTE(toabctl): if something changes here on the buildservice side, please
# first ask in #opensuse-cloud on freenode before you change the format here!
DIB_CLOUD_IMAGES=${DIB_CLOUD_IMAGES:-http://download.opensuse.org/repositories/Cloud:/Images:/${OPENSUSE_IMAGE_BASEDIR}_${DIB_RELEASE}/images/}
BASE_IMAGE_FILE=${BASE_IMAGE_FILE:-${OPENSUSE_IMAGE_FILE}-rootfs.${ARCH}.tbz}
SHA256SUMS_FILE=${SHA256SUMS_FILE:-${BASE_IMAGE_FILE}.sha256}
CACHED_FILE=$DIB_IMAGE_CACHE/$BASE_IMAGE_FILE
CACHED_SHA256SUMS_FILE=$DIB_IMAGE_CACHE/SHA256SUMS.$BASE_IMAGE_FILE
# FIXME: either check the checksums into git or verify the signature
# on the checksums. We should not be trusting checksums we download
# over HTTP
if [ -n "$DIB_OFFLINE" -a -f "$CACHED_FILE" ] ; then
echo "Not checking freshness of cached $CACHED_FILE."
else
echo "Fetching Base Image"
$TMP_HOOKS_PATH/bin/cache-url $DIB_CLOUD_IMAGES/$SHA256SUMS_FILE $CACHED_SHA256SUMS_FILE
$TMP_HOOKS_PATH/bin/cache-url $DIB_CLOUD_IMAGES/$BASE_IMAGE_FILE $CACHED_FILE
pushd $DIB_IMAGE_CACHE
# Calculate sha256sum of downloaded image and check against content from sha256 file
SHA256SUM=$(sha256sum ${BASE_IMAGE_FILE} | cut -d " " -f1)
grep -q $SHA256SUM SHA256SUMS.$BASE_IMAGE_FILE
popd
fi
# Extract the base image (use --numeric-owner to avoid UID/GID mismatch between
# image tarball and host OS)
sudo tar -C $TARGET_ROOT --numeric-owner -xjf $CACHED_FILE