Merge #452: makeShell: use final system configuration in generate-secrets

1af84e8 makeShell: use actual system configuration in `generate-secrets` (Erik Arvstedt)

Pull request description:

ACKs for top commit:
  jonasnick:
    ACK 1af84e8

Tree-SHA512: d4d2808f627d45e152b2ae7224ccdadd93e727066086cf9dfe3c6ee674773da556e7c8a077794d6dc8f1df4f2a1a41c4f3abfbb3c7ebaca70d8152cd53295ab6

Author: jonasnick

helper/makeShell.nix

@@ -77,7 +77,11 @@ pkgs.stdenv.mkDerivation {
 
     generate-secrets() {(
       set -euo pipefail
-      genSecrets=$(nix-build --no-out-link -I nixos-config="${cfgDir}/configuration.nix" \
+      config="${cfgDir}/krops/krops-configuration.nix"
+      if [[ ! -e $config ]]; then
+        config="${cfgDir}/configuration.nix"
+      fi
+      genSecrets=$(nix-build --no-out-link -I nixos-config="$config" \
                    '<nixpkgs/nixos>' -A config.nix-bitcoin.generateSecretsScript)
       mkdir -p "${cfgDir}/secrets"
       (cd "${cfgDir}/secrets"; $genSecrets)