diskimage-builder/elements/cloud-init-datasources/install.d/05-set-cloud-init-sources

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#!/bin/bash
set -eu
set -o pipefail
DIB_CLOUD_INIT_DATASOURCES=${DIB_CLOUD_INIT_DATASOURCES:-""}
if [ -z "$DIB_CLOUD_INIT_DATASOURCES" ] ; then
echo "DIB_CLOUD_INIT_DATASOURCES must be set to a comma-separated list "
echo "of cloud-init data sources you wish to use, ie 'Ec2, NoCloud, ConfigDrive'"
exit 1
fi
# DatasourceNone doesn't exist in Ubuntu 12.04 (Precise)
# which uses cloud-init version 0.6.3
if [ "$(lsb_release -cs)" = 'precise' ] ; then
cat > /etc/cloud/cloud.cfg.d/91-dib-cloud-init-datasources.cfg <<EOF
datasource_list: [ $DIB_CLOUD_INIT_DATASOURCES ]
EOF
else
cat > /etc/cloud/cloud.cfg.d/91-dib-cloud-init-datasources.cfg <<EOF
datasource_list: [ $DIB_CLOUD_INIT_DATASOURCES, None ]
EOF
fi