#!/bin/sh
# Runs a command in a Linux virtual machine with this repository mounted
# at the same path: for the tests that need a Linux kernel, from a machine
# that is not one. Without arguments it runs scripts/kernel-tests.sh.
#
#   scripts/linux-vm.sh                      the kernel tests
#   scripts/linux-vm.sh cargo test           the whole test suite, on Linux
#   scripts/linux-vm.sh scripts/interop/lab.sh   the lab with FRR and BIRD
#   scripts/linux-vm.sh bash                 a shell
#
# The machine is made on first use with Lima (https://lima-vm.io; on macOS
# `brew install lima`): Ubuntu, with a Rust toolchain. It sees the
# repository read-only and builds into a directory of its own.
# `limactl stop ferrix` stops it and `limactl delete ferrix` removes it.
set -eu

vm=ferrix
repository="$(cd "$(dirname "$0")/.." && pwd)"
command -v limactl >/dev/null || { echo "limactl not found: install Lima first" >&2; exit 1; }

if ! limactl list --quiet | grep -qx "$vm"; then
    limactl start --name="$vm" --cpus=8 --memory=8 --disk=30 --tty=false template://ubuntu-lts
    limactl shell "$vm" bash -c '
        set -eu
        sudo apt-get update -qq
        sudo DEBIAN_FRONTEND=noninteractive apt-get install -y -qq build-essential iproute2 iputils-ping curl
        curl --proto "=https" --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --profile minimal -q
    '
elif [ "$(limactl list --format '{{.Status}}' "$vm")" != Running ]; then
    limactl start "$vm"
fi

[ $# -gt 0 ] || set -- scripts/kernel-tests.sh
limactl shell --workdir "$repository" "$vm" \
    bash -lc 'export CARGO_TARGET_DIR="$HOME/target"; exec "$@"' -- "$@"