#!/bin/bash

lxc launch ubuntu-daily:xenial curtin-sru-xenial
cat <<EOF | lxc exec curtin-sru-xenial /bin/bash
echo "deb http://archive.ubuntu.com/ubuntu $(lsb_release -sc)-proposed main universe" | sudo tee /etc/apt/sources.list.d/proposed.list
cloud-init status --long --wait && apt update -q && apt-cache policy curtin && apt install -qy curtin
dpkg --list | grep -c probert
echo "done"
EOF

-- OUTPUT --
deb http://archive.ubuntu.com/ubuntu xenial-proposed main universe

status: done
time: Mon, 08 Jul 2019 19:00:10 +0000
detail:
DataSourceNoCloud [seed=/var/lib/cloud/seed/nocloud-net][dsmode=net]

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

Hit:1 http://archive.ubuntu.com/ubuntu xenial InRelease
Get:2 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [109 kB]
Get:3 http://security.ubuntu.com/ubuntu xenial-security InRelease [109 kB]
Get:4 http://archive.ubuntu.com/ubuntu xenial-backports InRelease [107 kB]
Get:5 http://archive.ubuntu.com/ubuntu xenial-proposed InRelease [260 kB]
Get:6 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages [7532 kB]
Get:7 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages [698 kB]
Get:8 http://archive.ubuntu.com/ubuntu xenial/universe Translation-en [4354 kB]
Get:9 http://archive.ubuntu.com/ubuntu xenial/multiverse amd64 Packages [144 kB]
Get:10 http://archive.ubuntu.com/ubuntu xenial/multiverse Translation-en [106 kB]
Get:11 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages [988 kB]
Get:12 http://archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages [754 kB]
Get:13 http://security.ubuntu.com/ubuntu xenial-security/universe amd64 Packages [446 kB]
Get:14 http://archive.ubuntu.com/ubuntu xenial-updates/universe Translation-en [315 kB]
Get:15 http://archive.ubuntu.com/ubuntu xenial-updates/multiverse amd64 Packages [16.7 kB]
Get:16 http://archive.ubuntu.com/ubuntu xenial-updates/multiverse Translation-en [8440 B]
Get:17 http://archive.ubuntu.com/ubuntu xenial-backports/main amd64 Packages [7280 B]
Get:18 http://archive.ubuntu.com/ubuntu xenial-backports/main Translation-en [4456 B]
Get:19 http://archive.ubuntu.com/ubuntu xenial-backports/universe amd64 Packages [7804 B]
Get:20 http://archive.ubuntu.com/ubuntu xenial-backports/universe Translation-en [4184 B]
Get:21 http://archive.ubuntu.com/ubuntu xenial-proposed/main amd64 Packages [35.9 kB]
Get:22 http://archive.ubuntu.com/ubuntu xenial-proposed/main Translation-en [15.7 kB]
Get:23 http://archive.ubuntu.com/ubuntu xenial-proposed/universe amd64 Packages [4368 B]
Get:24 http://archive.ubuntu.com/ubuntu xenial-proposed/universe Translation-en [4316 B]
Get:25 http://security.ubuntu.com/ubuntu xenial-security/universe Translation-en [181 kB]
Get:26 http://security.ubuntu.com/ubuntu xenial-security/multiverse amd64 Packages [5604 B]
Get:27 http://security.ubuntu.com/ubuntu xenial-security/multiverse Translation-en [2676 B]
Fetched 16.2 MB in 4s (4054 kB/s)
Reading package lists...
Building dependency tree...
Reading state information...
7 packages can be upgraded. Run 'apt list --upgradable' to see them.
curtin:
  Installed: (none)
  Candidate: 19.1-7-g37a7a0f4-0ubuntu1~16.04.1
  Version table:
     19.1-7-g37a7a0f4-0ubuntu1~16.04.1 500
        500 http://archive.ubuntu.com/ubuntu xenial-proposed/universe amd64 Packages
     18.2-10-g7afd77fa-0ubuntu1~16.04.1 500
        500 http://archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages
     0.1.0~bzr365-0ubuntu1 500
        500 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

Reading package lists...
Building dependency tree...
Reading state information...
The following package was automatically installed and is no longer required:
  libfreetype6
Use 'apt autoremove' to remove it.
The following additional packages will be installed:
  curtin-common python3-curtin
The following NEW packages will be installed:
  curtin curtin-common python3-curtin
0 upgraded, 3 newly installed, 0 to remove and 7 not upgraded.
Need to get 161 kB of archives.
After this operation, 785 kB of additional disk space will be used.
Get:1 http://archive.ubuntu.com/ubuntu xenial-proposed/main amd64 curtin-common all 19.1-7-g37a7a0f4-0ubuntu1~16.04.1 [19.8 kB]
Get:2 http://archive.ubuntu.com/ubuntu xenial-proposed/main amd64 python3-curtin all 19.1-7-g37a7a0f4-0ubuntu1~16.04.1 [138 kB]
Get:3 http://archive.ubuntu.com/ubuntu xenial-proposed/universe amd64 curtin all 19.1-7-g37a7a0f4-0ubuntu1~16.04.1 [2400 B]
dpkg-preconfigure: unable to re-open stdin: No such file or directory
Fetched 161 kB in 0s (358 kB/s)
Selecting previously unselected package curtin-common.
(Reading database ... 25741 files and directories currently installed.)
Preparing to unpack .../curtin-common_19.1-7-g37a7a0f4-0ubuntu1~16.04.1_all.deb ...
Unpacking curtin-common (19.1-7-g37a7a0f4-0ubuntu1~16.04.1) ...
Selecting previously unselected package python3-curtin.
Preparing to unpack .../python3-curtin_19.1-7-g37a7a0f4-0ubuntu1~16.04.1_all.deb ...
Unpacking python3-curtin (19.1-7-g37a7a0f4-0ubuntu1~16.04.1) ...
Selecting previously unselected package curtin.
Preparing to unpack .../curtin_19.1-7-g37a7a0f4-0ubuntu1~16.04.1_all.deb ...
Unpacking curtin (19.1-7-g37a7a0f4-0ubuntu1~16.04.1) ...
Setting up curtin-common (19.1-7-g37a7a0f4-0ubuntu1~16.04.1) ...
Setting up python3-curtin (19.1-7-g37a7a0f4-0ubuntu1~16.04.1) ...
Setting up curtin (19.1-7-g37a7a0f4-0ubuntu1~16.04.1) ...
0
done