From fd8e2f705629729881f09b319959d777becfec83 Mon Sep 17 00:00:00 2001
From: Benedikt Peetz <benedikt.peetz@b-peetz.de>
Date: Mon, 14 Apr 2025 11:45:48 +0200
Subject: pkgs/brightness: Migrate to `writeShellApplication`

---
 pkgs/by-name/br/brightness/brightness.sh | 26 +++++++++-----------------
 pkgs/by-name/br/brightness/package.nix   | 20 +++++++++++++-------
 2 files changed, 22 insertions(+), 24 deletions(-)

diff --git a/pkgs/by-name/br/brightness/brightness.sh b/pkgs/by-name/br/brightness/brightness.sh
index 887dbb1e..3d6b2335 100755
--- a/pkgs/by-name/br/brightness/brightness.sh
+++ b/pkgs/by-name/br/brightness/brightness.sh
@@ -1,24 +1,23 @@
-#!/usr/bin/env dash
+#!/usr/bin/env sh
 
-# shellcheck source=/dev/null
-SHELL_LIBRARY_VERSION="2.1.2" . %SHELL_LIBRARY_PATH
+die() {
+    echo "ERROR: $1"
+    exit 1
+}
 
 help() {
     cat <<EOF
 This is a system brightness manager
 
 USAGE:
-    $NAME up [VALUE] | down [VALUE]
+    $NAME set VALUE
 
 OPTIONS:
     --help   | -h
                                 Output this help and exit.
 
-    --version   | -v
-                                Output the version and exit.
-
 COMMANDS:
-    set [VALUE]
+    set VALUE
                                 Set the brightness to the specified percentage.
 
 ARGUMENTS:
@@ -27,17 +26,14 @@ ARGUMENTS:
 EOF
 }
 
-BACKLIGHT="/sys/class/backlight/%BACKLIGHT_NAME"
+BACKLIGHT="/sys/class/backlight/$BACKLIGHT_NAME"
 
 brightness() {
     perc="$1"
 
-    max="$(cat $BACKLIGHT/max_brightness)"
-
+    max="$(cat "$BACKLIGHT/max_brightness")"
     new="$(echo | awk --assign=perc="$perc" '{printf (perc / 100)}')"
-
     output="$(echo | awk --assign=new="$new" --assign=max="$max" '{printf max * new}')"
-
     echo "$output" >"$BACKLIGHT/brightness"
 }
 
@@ -47,10 +43,6 @@ for arg in "$@"; do
         help
         exit 0
         ;;
-    "--version" | "-v")
-        version
-        exit 0
-        ;;
     esac
 done
 
diff --git a/pkgs/by-name/br/brightness/package.nix b/pkgs/by-name/br/brightness/package.nix
index c2e31a0c..7d9d2194 100644
--- a/pkgs/by-name/br/brightness/package.nix
+++ b/pkgs/by-name/br/brightness/package.nix
@@ -1,14 +1,20 @@
 {
-  sysLib,
+  writeShellApplication,
+  # Arguments
   backlightName ? "intel_backlight", # nixosConfig.soispha.laptop.backlight
+  # Dependencies
+  gawk,
+  coreutils,
 }:
-sysLib.writeShellScript {
+writeShellApplication {
   name = "brightness";
-  src = ./brightness.sh;
-  generateCompletions = true;
-  keepPath = false;
+  text = builtins.readFile ./brightness.sh;
+  inheritPath = false;
 
-  replacementStrings = {BACKLIGHT_NAME = backlightName;};
+  runtimeEnv = {BACKLIGHT_NAME = backlightName;};
 
-  dependencies = [];
+  runtimeInputs = [
+    gawk
+    coreutils
+  ];
 }
-- 
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