wakatime: init at 6.0.1

To hack together a working WakaTime under emacs on NixOS:

* Install both `wakatime` and `(emacsWithPackages [ wakatime-mode ])`
* Add the following to your initialisation file (default: ~/.emacs):
  (custom-set-variables
   ;; ...
   '(wakatime-api-key "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX")
   '(wakatime-cli-path "")					; sic
   '(wakatime-python-bin "/path/to/profile/bin/wakatime"))	; sic
* `M-x global-wakatime-mode` to test your settings.

pkgs/tools/misc/wakatime/default.nix

@@ -0,0 +1,29 @@
+{ stdenv, pythonPackages, fetchFromGitHub }:
+
+with pythonPackages;
+
+buildPythonPackage rec {
+  namePrefix = "";
+  name = "wakatime-${version}";
+  version = "6.0.1";
+
+  src = fetchFromGitHub {
+    sha256 = "0bkzchivkz39jiz78jy7zkpsg6fd94wd7nsmrnijvxb3dn35l7l2";
+    rev = version;
+    repo = "wakatime";
+    owner = "wakatime";
+  };
+
+  meta = with stdenv.lib; {
+    inherit (src.meta) homepage;
+    description = "WakaTime command line interface";
+    longDescription = ''
+      Command line interface to WakaTime used by all WakaTime text editor
+      plugins. You shouldn't need to directly use this package unless you
+      are building your own plugin or your text editor's plugin asks you
+      to install the wakatime CLI interface manually.
+    '';
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ nckx ];
+  };
+}

pkgs/top-level/all-packages.nix

@@ -3639,6 +3639,8 @@ in
 
   vtun = callPackage ../tools/networking/vtun { };
 
+  wakatime = callPackage ../tools/misc/wakatime { };
+
   weather = callPackage ../applications/misc/weather { };
 
   wego = goPackages.wego.bin // { outputs = [ "bin" ]; };