diskimage-builder/diskimage_builder/elements/debian-minimal/pre-install.d/02-debian-apt-update
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
# Copyright (c) 2014 Hewlett-Packard Development Company, L.P.
# Copyright (c) 2016 Andreas Florath (andreas@florath.net)
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
#
# See the License for the specific language governing permissions and
# limitations under the License.
#
# The filename needs to be 02-...: because the install-package script
# is installed in the dpkg/pre-install/01-dpkg and that has to be executed
# first.
if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
set -x
fi
set -eu
set -o pipefail
# Writes the apt sources files.
# The description is passed in via line coded elements.
# (The approach using associative arrays for configuration faild,
# because it looks that there is no way to handle defaults in
# this case - and additionally we run with '-u'.)
function apt_sources_write {
local APT_SOURCES_CONF="$1"
mkdir -p /etc/apt/sources.list.d
echo "${APT_SOURCES_CONF}" \
| while read line; do
local name=$(echo ${line} | cut -d ":" -f 1)
local value=$(echo ${line} | cut -d ":" -f 2-)
echo "$value" >>/etc/apt/sources.list.d/${name}.list
done
}
apt_sources_write "${DIB_APT_SOURCES_CONF}"
# Need to update to retrieve the signed Release file
apt-get update
apt-get clean
install-packages -u