light: drop

Unmaintained upstream;
see https://github.com/NixOS/nixpkgs/issues/354405

doc/release-notes/rl-2605.section.md

@@ -161,6 +161,9 @@
 
 - `python3packages.pillow-avif-plugin` has been removed as the functionality is included in `python3packages.pillow` directly since version 11.3.
 
+- `light` has been removed because it was unmaintained.
+  `brightnessctl` and `acpilight` provide similar functionality.
+
 - `services.openssh.settings.AcceptEnv` now explicitly defined as an option that takes a list of strings, to facilitate option merging. Setting it to a string value is no longer supported.
 
 - `nodejs-slim` has a `npm` and a `corepack` outputs, and `nodejs` no longer has a `libv8` output.

pkgs/by-name/li/light/0001-define-light-loglevel-as-extern.patch

@@ -1,38 +0,0 @@
-From 47f163f6bcd1d66bebc49d96abcf46853a0708fb Mon Sep 17 00:00:00 2001
-From: wxt <3264117476@qq.com>
-Date: Tue, 22 Oct 2024 07:48:34 +0800
-Subject: [PATCH] fix build
-
----
- src/helpers.c | 1 +
- src/helpers.h | 2 +-
- 2 files changed, 2 insertions(+), 1 deletion(-)
-
-diff --git a/src/helpers.c b/src/helpers.c
-index c7bc4de..00e6098 100644
---- a/src/helpers.c
-+++ b/src/helpers.c
-@@ -9,6 +9,7 @@
- #include <errno.h> // errno
- #include <libgen.h> // dirname 
- 
-+light_loglevel_t light_loglevel;
- 
- bool light_file_read_uint64(char const *filename, uint64_t *val)
- {
-diff --git a/src/helpers.h b/src/helpers.h
-index f73714b..4a92753 100644
---- a/src/helpers.h
-+++ b/src/helpers.h
-@@ -21,7 +21,7 @@ typedef enum {
-     LIGHT_NOTE_LEVEL
- } light_loglevel_t;
- 
--light_loglevel_t light_loglevel;
-+extern light_loglevel_t light_loglevel;
- 
- #define LIGHT_LOG(lvl, fp, fmt, args...)\
-     if(light_loglevel >= lvl)\
--- 
-2.46.1
-

pkgs/by-name/li/light/package.nix

@@ -1,51 +0,0 @@
-{
-  lib,
-  stdenv,
-  fetchFromGitLab,
-  autoreconfHook,
-  coreutils,
-  udevCheckHook,
-}:
-
-stdenv.mkDerivation {
-  version = "1.2.2";
-  pname = "light";
-
-  src = fetchFromGitLab {
-    owner = "dpeukert";
-    repo = "light";
-    rev = "2a54078cbe3814105ee4f565f451b1b5947fbde0";
-    hash = "sha256-OmHdVJvBcBjJiPs45JqOHxFoJYvKIEIpt9pFhBz74Kg=";
-  };
-
-  configureFlags = [ "--with-udev" ];
-
-  nativeBuildInputs = [
-    autoreconfHook
-    udevCheckHook
-  ];
-
-  patches = [
-    ./0001-define-light-loglevel-as-extern.patch
-  ];
-
-  # ensure udev rules can find the commands used
-  postPatch = ''
-    substituteInPlace 90-backlight.rules \
-      --replace-fail '/bin/chgrp' '${coreutils}/bin/chgrp' \
-      --replace-fail '/bin/chmod' '${coreutils}/bin/chmod'
-  '';
-
-  doInstallCheck = true;
-
-  meta = {
-    description = "GNU/Linux application to control backlights";
-    homepage = "https://gitlab.com/dpeukert/light";
-    license = lib.licenses.gpl3Only;
-    mainProgram = "light";
-    maintainers = with lib.maintainers; [
-      puffnfresh
-    ];
-    platforms = lib.platforms.linux;
-  };
-}

pkgs/top-level/aliases.nix

@@ -1106,6 +1106,7 @@ mapAliases {
   libXxf86dga = libxxf86dga; # Added 2026-02-06
   libXxf86misc = libxxf86misc; # Added 2026-02-06
   libXxf86vm = libxxf86vm; # Added 2026-02-06
+  light = throw "'light' has been removed because it was unmaintained. 'brightnessctl' and 'acpilight' provide similar functionality."; # Added 2026-02-24
   lightdm_gtk_greeter = throw "'lightdm_gtk_greeter' has been renamed to/replaced by 'lightdm-gtk-greeter'"; # Converted to throw 2025-10-27
   lightly-boehs = throw "'lightly-boehs' has been removed, as it is only compatible with Plasma 5, which is EOL"; # Added 2025-08-20
   lightly-qt = throw "'lightly-qt' has been removed, as it is only compatible with Plasma 5, which is EOL"; # Added 2025-08-20