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/networking/ejabberd.nix

@@ -0,0 +1,157 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.services.ejabberd;
+
+  ctlcfg = pkgs.writeText "ejabberdctl.cfg" ''
+    ERL_EPMD_ADDRESS=127.0.0.1
+    ${cfg.ctlConfig}
+  '';
+
+  ectl = ''${cfg.package}/bin/ejabberdctl ${optionalString (cfg.configFile != null) "--config ${cfg.configFile}"} --ctl-config "${ctlcfg}" --spool "${cfg.spoolDir}" --logs "${cfg.logsDir}"'';
+
+  dumps = lib.escapeShellArgs cfg.loadDumps;
+
+in {
+
+  ###### interface
+
+  options = {
+
+    services.ejabberd = {
+
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Whether to enable ejabberd server";
+      };
+
+      package = mkOption {
+        type = types.package;
+        default = pkgs.ejabberd;
+        defaultText = literalExpression "pkgs.ejabberd";
+        description = "ejabberd server package to use";
+      };
+
+      user = mkOption {
+        type = types.str;
+        default = "ejabberd";
+        description = "User under which ejabberd is ran";
+      };
+
+      group = mkOption {
+        type = types.str;
+        default = "ejabberd";
+        description = "Group under which ejabberd is ran";
+      };
+
+      spoolDir = mkOption {
+        type = types.path;
+        default = "/var/lib/ejabberd";
+        description = "Location of the spooldir of ejabberd";
+      };
+
+      logsDir = mkOption {
+        type = types.path;
+        default = "/var/log/ejabberd";
+        description = "Location of the logfile directory of ejabberd";
+      };
+
+      configFile = mkOption {
+        type = types.nullOr types.path;
+        description = "Configuration file for ejabberd in YAML format";
+        default = null;
+      };
+
+      ctlConfig = mkOption {
+        type = types.lines;
+        default = "";
+        description = "Configuration of ejabberdctl";
+      };
+
+      loadDumps = mkOption {
+        type = types.listOf types.path;
+        default = [];
+        description = "Configuration dumps that should be loaded on the first startup";
+        example = literalExpression "[ ./myejabberd.dump ]";
+      };
+
+      imagemagick = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Add ImageMagick to server's path; allows for image thumbnailing";
+      };
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = mkIf cfg.enable {
+    environment.systemPackages = [ cfg.package ];
+
+    users.users = optionalAttrs (cfg.user == "ejabberd") {
+      ejabberd = {
+        group = cfg.group;
+        home = cfg.spoolDir;
+        createHome = true;
+        uid = config.ids.uids.ejabberd;
+      };
+    };
+
+    users.groups = optionalAttrs (cfg.group == "ejabberd") {
+      ejabberd.gid = config.ids.gids.ejabberd;
+    };
+
+    systemd.services.ejabberd = {
+      description = "ejabberd server";
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" ];
+      path = [ pkgs.findutils pkgs.coreutils ] ++ lib.optional cfg.imagemagick pkgs.imagemagick;
+
+      serviceConfig = {
+        User = cfg.user;
+        Group = cfg.group;
+        ExecStart = "${ectl} foreground";
+        ExecStop = "${ectl} stop";
+        ExecReload = "${ectl} reload_config";
+      };
+
+      preStart = ''
+        if [ -z "$(ls -A '${cfg.spoolDir}')" ]; then
+          touch "${cfg.spoolDir}/.firstRun"
+        fi
+      '';
+
+      postStart = ''
+        while ! ${ectl} status >/dev/null 2>&1; do
+          if ! kill -0 "$MAINPID"; then exit 1; fi
+          sleep 0.1
+        done
+
+        if [ -e "${cfg.spoolDir}/.firstRun" ]; then
+          rm "${cfg.spoolDir}/.firstRun"
+          for src in ${dumps}; do
+            find "$src" -type f | while read dump; do
+              echo "Loading configuration dump at $dump"
+              ${ectl} load "$dump"
+            done
+          done
+        fi
+      '';
+    };
+
+    systemd.tmpfiles.rules = [
+      "d '${cfg.logsDir}' 0750 ${cfg.user} ${cfg.group} -"
+      "d '${cfg.spoolDir}' 0700 ${cfg.user} ${cfg.group} -"
+    ];
+
+    security.pam.services.ejabberd = {};
+
+  };
+
+}