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/tests/networking-proxy.nix

@@ -0,0 +1,134 @@
+# Test whether `networking.proxy' work as expected.
+
+# TODO: use a real proxy node and put this test into networking.nix
+# TODO: test whether nix tools work as expected behind a proxy
+
+let default-config = {
+        imports = [ ./common/user-account.nix ];
+
+        services.xserver.enable = false;
+
+      };
+in import ./make-test-python.nix ({ pkgs, ...} : {
+  name = "networking-proxy";
+  meta = with pkgs.lib.maintainers; {
+    maintainers = [  ];
+  };
+
+  nodes = {
+    # no proxy
+    machine =
+      { ... }:
+
+      default-config;
+
+    # proxy default
+    machine2 =
+      { ... }:
+
+      default-config // {
+        networking.proxy.default = "http://user:pass@host:port";
+      };
+
+    # specific proxy options
+    machine3 =
+      { ... }:
+
+      default-config //
+      {
+        networking.proxy = {
+          # useless because overriden by the next options
+          default = "http://user:pass@host:port";
+          # advanced proxy setup
+          httpProxy = "123-http://user:pass@http-host:port";
+          httpsProxy = "456-http://user:pass@https-host:port";
+          rsyncProxy = "789-http://user:pass@rsync-host:port";
+          ftpProxy = "101112-http://user:pass@ftp-host:port";
+          noProxy = "131415-127.0.0.1,localhost,.localdomain";
+        };
+      };
+
+    # mix default + proxy options
+    machine4 =
+      { ... }:
+
+      default-config // {
+        networking.proxy = {
+          # open for all *_proxy env var
+          default = "000-http://user:pass@default-host:port";
+          # except for those 2
+          rsyncProxy = "123-http://user:pass@http-host:port";
+          noProxy = "131415-127.0.0.1,localhost,.localdomain";
+        };
+      };
+    };
+
+  testScript =
+    ''
+      from typing import Dict, Optional
+
+
+      def get_machine_env(machine: Machine, user: Optional[str] = None) -> Dict[str, str]:
+          """
+          Gets the environment from a given machine, and returns it as a
+          dictionary in the form:
+              {"lowercase_var_name": "value"}
+
+          Duplicate environment variables with the same name
+          (e.g. "foo" and "FOO") are handled in an undefined manner.
+          """
+          if user is not None:
+              env = machine.succeed("su - {} -c 'env -0'".format(user))
+          else:
+              env = machine.succeed("env -0")
+          ret = {}
+          for line in env.split("\0"):
+              if "=" not in line:
+                  continue
+
+              key, val = line.split("=", 1)
+              ret[key.lower()] = val
+          return ret
+
+
+      start_all()
+
+      with subtest("no proxy"):
+          assert "proxy" not in machine.succeed("env").lower()
+          assert "proxy" not in machine.succeed("su - alice -c env").lower()
+
+      with subtest("default proxy"):
+          assert "proxy" in machine2.succeed("env").lower()
+          assert "proxy" in machine2.succeed("su - alice -c env").lower()
+
+      with subtest("explicitly-set proxy"):
+          env = get_machine_env(machine3)
+          assert "123" in env["http_proxy"]
+          assert "456" in env["https_proxy"]
+          assert "789" in env["rsync_proxy"]
+          assert "101112" in env["ftp_proxy"]
+          assert "131415" in env["no_proxy"]
+
+          env = get_machine_env(machine3, "alice")
+          assert "123" in env["http_proxy"]
+          assert "456" in env["https_proxy"]
+          assert "789" in env["rsync_proxy"]
+          assert "101112" in env["ftp_proxy"]
+          assert "131415" in env["no_proxy"]
+
+      with subtest("default proxy + some other specifics"):
+          env = get_machine_env(machine4)
+          assert "000" in env["http_proxy"]
+          assert "000" in env["https_proxy"]
+          assert "123" in env["rsync_proxy"]
+          assert "000" in env["ftp_proxy"]
+          assert "131415" in env["no_proxy"]
+
+          env = get_machine_env(machine4, "alice")
+          assert "000" in env["http_proxy"]
+          assert "000" in env["https_proxy"]
+          assert "123" in env["rsync_proxy"]
+          assert "000" in env["ftp_proxy"]
+          assert "131415" in env["no_proxy"]
+    '';
+})