#!/bin/sh -e

. /usr/share/debconf/confmodule

hasEc2Md() {

local d=/var/lib/cloud i=/var/lib/cloud/instance/ f=""

local flist="${i}/datasource ${i}/obj.pkl ${d}/cache/obj.pkl"

# search current instance data source information

for f in ${flist}; do

[ -f "${f}" ] || continue

grep -q DataSourceEc2 "${f}" 2>/dev/null && return 0

done

# there was no data above found that would have been indicated

# by a upgrade. lets just see if we can't find the metadata

# service. if wget is not present (it is not 'essential')

# then we will quietly return 1

local url="http://169.254.169.254/2009-04-04/meta-data/instance-id"

i=""

if command -v wget >/dev/null 2>&1; then

local tout="--connect-timeout 5 --read-timeout 5 --tries 1"

i=$(wget "${url}" ${tout} -O - 2>/dev/null) || :

elif command -v curl >/dev/null 2>&1; then

i=$(curl "${url}" --max-time 1) || :

fi

# if instance-id starts with 'i-' then in all likelyhood its good

[ "${i#i-}" != "${i}" ] && return 0

return 1

}

if [ ! -f /etc/cloud/distro.cfg ] &&

[ ! -f /etc/cloud/cloud.cfg.d/90_dpkg.cfg ] &&

{ db_fget cloud-init/datasources seen || : ; } &&

[ "${RET}" = "false" ]; then

db_get cloud-init/datasources

def="${RET}"

# if this is the first time this we've run, then try

# to detect if we would have access to DataSourceEc2

case " ${def}," in

*\ Ec2,*) :;;

*) hasEc2Md &&

db_set cloud-init/datasources "${def:+${def}, }Ec2";;

esac

fi

db_input low cloud-init/datasources || true

db_go

exit 0