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nixos/modules/common/aliases.nix
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beatzaplentyandClaude Sonnet 5 0cd8f15b48 Add buildImage shell function for building lxc-* tarballs with host keys
lxc-* hosts need NIXOS_HOST_KEYS_DIR + --impure to bake in a pre-seeded
SSH host key, otherwise sops-nix's .sops.yaml recipient never matches
and every secret permanently fails to decrypt on first boot. That
invocation is easy to forget, so wrap it as `buildImage <flake-target>`
alongside the existing Switch-nix/Test-nix helpers.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2026-07-20 17:12:16 +10:00

51 lines
1.8 KiB
Nix

{ config, pkgs, lib, vars, ... }:
let
# Flake attribute names are now <platform>-<buildtype> (e.g. proxmox-docker)
# and no longer match networking.hostName, since a host's hostname stays
# fixed while the platform backing it can change. Each nixosConfiguration
# stamps its own active target name into /etc/flake-target at build time.
mySwitchCmd = ''
sudo nixos-rebuild switch \
--no-write-lock-file \
--refresh \
--flake git+https://${vars.lanDomain}/beatzaplenty/nixos.git#$(cat /etc/flake-target)
'';
myTestCmd = ''
sudo nixos-rebuild test \
--no-write-lock-file \
--refresh \
--flake git+https://${vars.lanDomain}/beatzaplenty/nixos.git#$(cat /etc/flake-target)
'';
# lxc-* hosts pre-seed their SSH host key at build time (see
# modules/platforms/lxc.nix) so sops-nix's .sops.yaml recipient matches on
# first boot -- without it, secrets permanently fail to decrypt (see that
# file's comment for the confirmed failure). That requires --impure plus
# NIXOS_HOST_KEYS_DIR pointing at the repo's host-keys/ dir, same pattern
# docs/auto-installer.md uses for the installer ISO. A function, not a
# shellAlias, since the target name has to interpolate into the middle of
# the flake attribute path, not just append after it. Must be run from the
# repo root, same as every other host-keys/ command in this repo.
buildImageFn = ''
buildImage() {
if [ -z "$1" ]; then
echo "usage: buildImage <flake-target> (e.g. lxc-docker)" >&2
return 1
fi
NIXOS_HOST_KEYS_DIR="$(pwd)/host-keys" nix build --impure \
".#nixosConfigurations.$1.config.system.build.tarball"
}
'';
in
{
programs.bash = {
enable = true;
shellAliases = {
"Switch-nix" = mySwitchCmd;
"Test-nix" = myTestCmd;
};
initExtra = buildImageFn;
};
}