neovim-remote: fix nvr --version by replacing pkg_resources with importlib.metadata (#535073)

pkgs/by-name/ne/neovim-remote/package.nix

@@ -25,6 +25,10 @@ python3.pkgs.buildPythonApplication (finalAttrs: {
       url = "https://github.com/mhinz/neovim-remote/commit/56d2a4097f4b639a16902390d9bdd8d1350f948c.patch";
       hash = "sha256-/PjE+9yfHtOUEp3xBaobzRM8Eo2wqOhnF1Es7SIdxvM=";
     })
+    # Fix nvr --version: replace deprecated pkg_resources with importlib.metadata
+    # (stdlib since Python 3.8). setuptools was correctly kept in build-system
+    # only; this avoids adding it as a spurious runtime dependency.
+    ./use-importlib-metadata.patch
   ];
 
   build-system = with python3.pkgs; [ setuptools ];

pkgs/by-name/ne/neovim-remote/use-importlib-metadata.patch

@@ -0,0 +1,20 @@
+Use importlib.metadata instead of pkg_resources for version queries.
+
+pkg_resources is a legacy setuptools API. importlib.metadata (stdlib since
+Python 3.8) is the correct replacement and requires no extra runtime dependency.
+
+--- a/nvr/nvr.py
++++ b/nvr/nvr.py
+@@ -360,10 +360,10 @@
+
+
+ def print_versions():
+-    import pkg_resources
+-    print('nvr ' + pkg_resources.require("neovim-remote")[0].version)
+-    print('pynvim ' + pkg_resources.require('pynvim')[0].version)
+-    print('psutil ' + pkg_resources.require('psutil')[0].version)
++    from importlib.metadata import version
++    print('nvr ' + version("neovim-remote"))
++    print('pynvim ' + version('pynvim'))
++    print('psutil ' + version('psutil'))
+     print('Python ' + sys.version.split('\n')[0])