PoC partial upgrade ArchLinux Dockerfile

Dockerfile

# https://gist.github.com/iTrooz/251d085c5fb2d852533c37edcd5f3d08
# PoC a ArchLinux partial upgrade and its damage
# Working as of 2022/12/26, might not work on the future due to ArchLinux repositories changes

# Image from 2022/06/26
FROM archlinux:base-devel-20220626.0.64095

# Try to upgrade all packages, but then cancel
# this also works by running `pacman -Sy`
RUN echo "n" | pacman -Syu || true
# Explanation : we just updated the package database without upgrading packages. You shouldn't
# do this unless you know what you are doing

# simulate we install a package that depend on openssl>=3
# (ArchLinux bumped openssl from 1.1 to 3 somewhere in 2022/07 )
RUN yes | pacman -S "openssl>=3"
# Explanation : this force openssl to update to the latest version (would also work without '>=3'
# but this is how a dependent package would force upgrade to openssl 3)
# but pacman, being not updated, is still linked to openssl 1.1

# Try to run pacman
CMD ["pacman", "--help"]
# Explanation : pacman is still linked to openssl 1.1 but we just updated it to openssl 3.
# Thereforce, the old libraries are not here anymore, and pacman fails with something like :
# pacman: error while loading shared libraries: libcrypto.so.1.1: cannot open shared object file: No such file or directory
# (libcrypto.so is provided by openssl)