prometheus-borgmatic-exporter: refactor

- relax prometheus-client
- add changelog to meta

pkgs/by-name/pr/prometheus-borgmatic-exporter/package.nix

@@ -1,34 +1,32 @@
 {
   lib,
+  borgmatic,
   fetchFromGitHub,
   python3Packages,
-  borgmatic,
 }:
+
 python3Packages.buildPythonApplication rec {
   pname = "prometheus-borgmatic-exporter";
   version = "0.2.5";
-    pyproject = true;
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "maxim-mityutko";
     repo = "borgmatic-exporter";
-    rev = "v${version}";
+    rev = "refs/tags/v${version}";
     hash = "sha256-SgP1utu4Eqs9214pYOT9wP0Ms7AUQH1A3czQF8+qBRo=";
   };
 
-  nativeCheckInputs = with python3Packages; [
-    pytestCheckHook
-    pytest-mock
-  ];
+  pythonRelaxDeps = [ "prometheus-client" ];
 
-  buildInputs = [python3Packages.poetry-core];
+  build-system = with python3Packages; [ poetry-core ];
 
   propagatedBuildInputs =
     [ borgmatic ]
     ++ (with python3Packages; [
-      flask
       arrow
       click
+      flask
       loguru
       pretty-errors
       prometheus-client
@@ -36,9 +34,15 @@ python3Packages.buildPythonApplication rec {
       waitress
     ]);
 
+  nativeCheckInputs = with python3Packages; [
+    pytestCheckHook
+    pytest-mock
+  ];
+
   meta = with lib; {
     description = "Prometheus exporter for Borgmatic";
     homepage = "https://github.com/maxim-mityutko/borgmatic-exporter";
+    changelog = "https://github.com/maxim-mityutko/borgmatic-exporter/releases/tag/v${version}";
     license = licenses.mit;
     maintainers = with maintainers; [ flandweber ];
     mainProgram = "borgmatic-exporter";