#!/bin/sh
# Install packages, falling through to the next Ubuntu mirror when one is
# unreachable. See docker/Dockerfile.e2e.
set -e

# Every rewrite starts from the pristine list, so a mirror that just failed does
# not become the pattern the next rewrite has to match.
[ -f /etc/apt/sources.list.orig ] || cp /etc/apt/sources.list /etc/apt/sources.list.orig

for mirror in azure.archive.ubuntu.com archive.ubuntu.com; do
	# Any archive host, so this works whether the pristine list came from the
	# base image (archive.ubuntu.com) or a CI runner (azure.archive.ubuntu.com).
	sed "s|http://[a-z0-9.]*archive\.ubuntu\.com/ubuntu|http://$mirror/ubuntu|g; s|http://security\.ubuntu\.com/ubuntu|http://$mirror/ubuntu|g" \
		/etc/apt/sources.list.orig > /etc/apt/sources.list
	if apt-get -o Acquire::Retries=3 -o Acquire::http::Timeout=15 update && \
		DEBIAN_FRONTEND=noninteractive apt-get -o Acquire::Retries=3 -o Acquire::http::Timeout=15 install -y \
			--no-install-recommends --no-install-suggests "$@"; then
		apt-get clean
		rm -rf /var/lib/apt/lists/*
		exit 0
	fi
	echo "apt: $mirror unreachable, trying the next mirror" >&2
done

exit 1