uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

nixos/modules/services/network-filesystems/yandex-disk.nix

@@ -0,0 +1,116 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+
+let
+
+  cfg = config.services.yandex-disk;
+
+  dir = "/var/lib/yandex-disk";
+
+  u = if cfg.user != null then cfg.user else "yandexdisk";
+
+in
+
+{
+
+  ###### interface
+
+  options = {
+
+    services.yandex-disk = {
+
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = "
+          Whether to enable Yandex-disk client. See https://disk.yandex.ru/
+        ";
+      };
+
+      username = mkOption {
+        default = "";
+        type = types.str;
+        description = ''
+          Your yandex.com login name.
+        '';
+      };
+
+      password = mkOption {
+        default = "";
+        type = types.str;
+        description = ''
+          Your yandex.com password. Warning: it will be world-readable in /nix/store.
+        '';
+      };
+
+      user = mkOption {
+        default = null;
+        type = types.nullOr types.str;
+        description = ''
+          The user the yandex-disk daemon should run as.
+        '';
+      };
+
+      directory = mkOption {
+        type = types.path;
+        default = "/home/Yandex.Disk";
+        description = "The directory to use for Yandex.Disk storage";
+      };
+
+      excludes = mkOption {
+        default = "";
+        type = types.commas;
+        example = "data,backup";
+        description = ''
+          Comma-separated list of directories which are excluded from synchronization.
+        '';
+      };
+
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = mkIf cfg.enable {
+
+    users.users = mkIf (cfg.user == null) [ {
+      name = u;
+      uid = config.ids.uids.yandexdisk;
+      group = "nogroup";
+      home = dir;
+    } ];
+
+    systemd.services.yandex-disk = {
+      description = "Yandex-disk server";
+
+      after = [ "network.target" ];
+
+      wantedBy = [ "multi-user.target" ];
+
+      # FIXME: have to specify ${directory} here as well
+      unitConfig.RequiresMountsFor = dir;
+
+      script = ''
+        mkdir -p -m 700 ${dir}
+        chown ${u} ${dir}
+
+        if ! test -d "${cfg.directory}" ; then
+          (mkdir -p -m 755 ${cfg.directory} && chown ${u} ${cfg.directory}) ||
+            exit 1
+        fi
+
+        ${pkgs.su}/bin/su -s ${pkgs.runtimeShell} ${u} \
+          -c '${pkgs.yandex-disk}/bin/yandex-disk token -p ${cfg.password} ${cfg.username} ${dir}/token'
+
+        ${pkgs.su}/bin/su -s ${pkgs.runtimeShell} ${u} \
+          -c '${pkgs.yandex-disk}/bin/yandex-disk start --no-daemon -a ${dir}/token -d ${cfg.directory} --exclude-dirs=${cfg.excludes}'
+      '';
+
+    };
+  };
+
+}
+