#!/bin/bash

if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
    set -x
fi
set -eu
set -o pipefail

DIB_CLOUD_INIT_DATASOURCES=${DIB_CLOUD_INIT_DATASOURCES:-""}

# NOTE(TheJulia): If your looking at slightly more exotic configuration, the
# following links may be wortwhile to review. Specifically: ConfigDrive is just
# initial datasource configuration, and fallback network configuration basically
# always happens. Plus, cloud-init by default ignores other data in the
# configuration drive unless "openstack" is referenced. :\
# https://cloudinit.readthedocs.io/en/latest/reference/datasources/configdrive.html
# https://cloudinit.readthedocs.io/en/latest/reference/datasources/openstack.html#openstack-ironic-bare-metal

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
if [ -d /etc/cloud/cloud.cfg.d ]; then
    cat > /etc/cloud/cloud.cfg.d/91-dib-cloud-init-datasources.cfg <<EOF
datasource_list: [  $DIB_CLOUD_INIT_DATASOURCES, None ]
EOF
    # Newer cloud-init versions complain by default when they should
    # use the Ec2 datasource on a non-AWS cloud.  If the Ec2
    # datasource is desired, we need to tell cloud-init that we really
    # want this.  Otherwise there will be ugly warnings or worse.
    #
    if [[ $DIB_CLOUD_INIT_DATASOURCES =~ Ec2 ]]; then
        cat > /etc/cloud/cloud.cfg.d/92-ec2-datasource.cfg <<EOF
#cloud-config
datasource:
    Ec2:
        strict_id: false
EOF
    fi
    # If we are drawing configuration from configuration drive, we *very*
    # likely have network configuration there, so by default try that
    # instead of trying to do DHCP out of the gate.
    # https://cloudinit.readthedocs.io/en/latest/reference/network-config.html#disabling-network-activation
    if [[ $DIB_CLOUD_INIT_DATASOURCES =~ ConfigDrive ]]; then
        cat > /etc/cloud/cloud.cfg.d/93-dib-cloud-init-disable-datasource-network-activation.cfg <<EOF
disable_network_activation: true
EOF
    fi
fi