c3h-nixfiles/deploy.sh

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#!/usr/bin/env bash
set -eo pipefail
cd "$(dirname "$0")"
if ! command -v nix-build &> /dev/null
then
echo "Nix installation could not be found. Please follow the instructions linked below."
echo "https://nixos.org/manual/nix/unstable/installation/installing-binary.html"
exit
fi
mode="${1:-switch}"
host="${2:-nuc}"
target="${3:-c3h@$host.c3h}"
if ! [ -d "hosts/$host" ]
then
echo "Host $host does not exist. Choose from:"
ls hosts
exit
fi
echo "deploying $host to $target"
sleep 1
set -x
system_drv=$(
nix-instantiate "<nixpkgs/nixos>" -A config.system.build.toplevel \
-I "$(nix-build nix/sources-dir.nix --no-out-link)" \
-I "nixos-config=$PWD/hosts/$host/configuration.nix"
)
nix-copy-closure --to $target $system_drv
system=$(ssh $target "nix-store --realise $system_drv")
ssh $target "sudo nix-env -p /nix/var/nix/profiles/system -i $system && sudo /nix/var/nix/profiles/system/bin/switch-to-configuration $mode"