oizys/check.sh

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#!/usr/bin/env bash
set -euo pipefail
rm -f result
unset NIX_PATH
echo
echo ":: Updating the 'nixpkgs' input in flake.nix"; set -x
nix flake update --update-input nixpkgs &>/dev/null
set +x
echo
echo ":: Using 'nixos-rebuild' to build the 'mysystem' toplevel"; set -x
nixos-rebuild build --flake '.#mysystem'
set +x
flake_path="$(readlink -f ./result)"
# extract rev from flake.lock so we can figure out the nixpkgs rev used
rev="$(cat flake.lock| jq -r '.nodes.nixpkgs.locked.rev')"
echo
echo ":: Using rev=${rev} for <nixpkgs> (extracted from flake.nix)"; set +x
rm -f result
nixpkgs="https://github.com/nixos/nixpkgs/archive/${rev}.tar.gz"
nixosconfig="$(pwd)/configuration.nix"
echo
echo ":: Setting NIX_PATH to the same values flakes is using"; set -x
NIX_PATH="nixpkgs=${nixpkgs}:nixos-config=${nixosconfig}" \
nix-build '<nixpkgs/nixos>' -A config.system.build.toplevel
set +x
# nixos-rebuild build
classic_path="$(readlink -f ./result)"
set +x
echo
echo "flake: ${flake_path}"
echo "clssc: ${classic_path}"
if [[ "${flake_path}" != "${classic_path}" ]]; then
exit -1
fi