feature: Add automated colorscheme switching to Ghostty, refactor

watchman_tmux into generic utility function.

ghostty/config

@@ -35,7 +35,10 @@ clipboard-paste-protection = false
 window-decoration = false
 shell-integration = zsh
 
-theme = Ayu Mirage
+# This is the default fallback theme. This is only used
+# if the colorsync handled theme file doesn't exist.
+theme = Ayu
+config-file = ?colorsync_ghostty_theme
 background-opacity = 1.0
 background-blur-radius = 7
 

ghostty/ghostty-change-theme.sh

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+
+THEME=$(colorsync get)
+
+OUTPUT="$HOME/.config/ghostty/colorsync_ghostty_theme"
+
+default() {
+    printf "theme = Ayu" > "$OUTPUT"
+}
+
+case "$THEME" in
+  ayudark)
+    default
+    ;;
+  ayumirage)
+    printf "theme = Ayu Mirage" > "$OUTPUT"
+    ;;
+  ayulight)
+    printf "theme = ayu_light" > "$OUTPUT"
+    ;;
+  *)
+    default
+    ;;
+esac
+
+# once SIGUSR2 is merged in Ghostty, just replace the keystroke hack with pkill -USR2 ghostty
+case "$(uname)" in
+  Darwin)
+    osascript -e 'tell application "System Events" to keystroke "," using {command down, shift down}'
+    ;;
+  Linux)
+    wtype -M ctrl -M shift , -m shift -m ctrl
+    ;;
+  *)
+    echo "Unsupported OS"
+    ;;
+esac