nixos/sogo: prefer 'install' over 'chmod'/'chown'

  cfg = config.services.sogo;

  preStart = pkgs.writeShellScriptBin "sogo-prestart" ''

    touch /etc/sogo/sogo.conf

    chown sogo:sogo /etc/sogo/sogo.conf

    chmod 640 /etc/sogo/sogo.conf

    ${if (cfg.configReplaces != {}) then ''

      # Insert secrets

      ${concatStringsSep "\n" (mapAttrsToList (k: v: ''export ${k}="$(cat "${v}" | tr -d '\n')"'') cfg.configReplaces)}

      ${pkgs.perl}/bin/perl -p ${concatStringsSep " " (mapAttrsToList (k: v: '' -e 's/${k}/''${ENV{"${k}"}}/g;' '') cfg.configReplaces)} /etc/sogo/sogo.conf.raw > /etc/sogo/sogo.conf

      ${pkgs.perl}/bin/perl -p ${concatStringsSep " " (mapAttrsToList (k: v: '' -e 's/${k}/''${ENV{"${k}"}}/g;' '') cfg.configReplaces)} /etc/sogo/sogo.conf.raw | install -m 640 -o sogo -g sogo /dev/stdin /etc/sogo/sogo.conf

    '' else ''

      cp /etc/sogo/sogo.conf.raw /etc/sogo/sogo.conf

      install -m 640 -o sogo -g sogo /etc/sogo/sogo.conf.raw /etc/sogo/sogo.conf

    ''}

  '';