From 5306e9f1bd67412cab9e8b7e5ced33983d9d0688 Mon Sep 17 00:00:00 2001
From: Shihaam Abdul Rahman <shihaam@shihaam.me>
Date: Wed, 23 Sep 2026 03:41:42 +0500
Subject: [PATCH] lock script and prayertimes managed by nix

---
 config/sway/config   |  2 +-
 home/lock.nix        | 20 ++++++++++++++++++++
 home/packages.nix    |  1 +
 home/prayertimes.nix |  5 -----
 home/shihaam.nix     |  1 +
 scripts/lock.sh      | 12 ++++++++++++
 6 files changed, 35 insertions(+), 6 deletions(-)
 create mode 100644 home/lock.nix
 create mode 100755 scripts/lock.sh

diff --git a/config/sway/config b/config/sway/config
index ade0963..31acc6d 100644
--- a/config/sway/config
+++ b/config/sway/config
@@ -155,7 +155,7 @@ exec hash dbus-update-activation-environment 2>/dev/null && \
      dbus-update-activation-environment --systemd DISPLAY WAYLAND_DISPLAY SWAYSOCK
 exec xfce4-power-manager
 #exec /usr/bin/uxplay -avdec
-bindsym $mod+l exec /home/shihaam/scripts/lock.sh
+bindsym $mod+l exec /home/shihaam/scripts/lock.sh   # see home/lock.nix
 
 # Notification centre: $mod+n opens the panel (past notifications, mpris,
 # DND toggle), $mod+Shift+n flips do-not-disturb. -sw closes it again on the
diff --git a/home/lock.nix b/home/lock.nix
new file mode 100644
index 0000000..7bfe24a
--- /dev/null
+++ b/home/lock.nix
@@ -0,0 +1,20 @@
+# The screen lock bound to $mod+l in config/sway/config.
+#
+# It blanks the laptop panel, the keyboard backlight and the external monitor
+# (over DDC/CI) before swaylock, then restores whatever they were at. swaylock
+# itself comes from the sway module's default extraPackages, ddcutil from the
+# host's systemPackages, and brightnessctl from home/packages.nix.
+#
+# Linked as a plain executable rather than wrapped with writeShellApplication,
+# so it stays a file that can be edited and run on its own -- same reasoning as
+# home/prayertimes.nix.
+#
+# Iteration loop: edit scripts/lock.sh -> git add if new -> nixos-rebuild switch.
+{ ... }:
+
+{
+  home.file."scripts/lock.sh" = {
+    source = ../scripts/lock.sh;
+    executable = true;
+  };
+}
diff --git a/home/packages.nix b/home/packages.nix
index 326c1ee..6c23c39 100644
--- a/home/packages.nix
+++ b/home/packages.nix
@@ -6,6 +6,7 @@
     ripdrag
     playerctl # waybar mediaplayer module + swaync's mpris widget
     libnotify # notify-send, used by config/waybar/scripts/monitor-brightness.sh
+    brightnessctl # waybar backlight scroll + scripts/lock.sh
     fastfetch
     p7zip
     unrar # unfree
diff --git a/home/prayertimes.nix b/home/prayertimes.nix
index 35e1fe5..7d1c417 100644
--- a/home/prayertimes.nix
+++ b/home/prayertimes.nix
@@ -3,11 +3,6 @@
 #
 # Times come from github.com/WovenCoast/prayertimes-db and the lookup follows
 # git.shihaam.dev/flamexode/prayertimes-sh. Every island's table is vendored, so
-# switching island is an edit to config/prayertimes/islands.conf and a rebuild.
-#
-# Only the one script is linked out of scripts/, not the directory: ~/scripts
-# also holds unmanaged things, such as the lock.sh that config/sway/config binds
-# to $mod+l.
 #
 # Iteration loop: edit scripts/prayertimes.sh or config/prayertimes/islands.conf
 # -> git add if new -> nixos-rebuild switch -> prayertimes.sh today, and
diff --git a/home/shihaam.nix b/home/shihaam.nix
index 042f7fb..11d6631 100644
--- a/home/shihaam.nix
+++ b/home/shihaam.nix
@@ -7,6 +7,7 @@
     ./packages.nix
     ./fonts.nix
     ./kdeconnect.nix
+    ./lock.nix
     ./nano.nix
     ./obs.nix
     ./prayertimes.nix
diff --git a/scripts/lock.sh b/scripts/lock.sh
new file mode 100755
index 0000000..479ea42
--- /dev/null
+++ b/scripts/lock.sh
@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+prev_laptop=$(brightnessctl get)
+prev_monitor=$(ddcutil -d 1 getvcp 10 | awk '{print $9}' | tr -d ',')
+prev_kbd=$(brightnessctl -d tpacpi::kbd_backlight get)
+
+ddcutil -d 1 setvcp 10 0 &
+brightnessctl set 0
+brightnessctl -d tpacpi::kbd_backlight set 0
+swaylock -e -c 000000
+ddcutil -d 1 setvcp 10 "$prev_monitor"
+brightnessctl set "$prev_laptop"
+brightnessctl -d tpacpi::kbd_backlight set "$prev_kbd"