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#!/usr/bin/env bash
set -euo pipefail
top=$(dirname "$(realpath "$0")")
configPath="$top/hosts/$HOSTNAME/default.nix"
if [ ! -f $configPath ]; then
echo "aborting: $configPath doesn't exist"
exit 1
fi
nixpkgsPath=$(
cd "$top" &&
nix-instantiate --eval --raw \
--argstr host "$HOSTNAME" \
--expr '
{ host }:
let
toml = builtins.readFile ./hosts/${host}/metadata.toml;
channel = (builtins.fromTOML toml).channel;
in
(import ./npins).${channel}.outPath
'
)
# FIXME: change into host directory for host-specific garbage collector roots
cd "$top"
# nixos-rebuild always reads Nixpkgs from the NIX_PATH,
# so we need to set it explicitly to our pinned version
exec nixos-rebuild "$@" -I nixpkgs="$nixpkgsPath" -I nixos-config="$configPath" -I top="$top"
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