script: refactor change-colortheme

fuzzel/apply-color

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+path=$(dirname "$(readlink -f "$0")")
+. "$path"/../.utils/apply-color-parse-arg
+
+file="$path"/fuzzel.ini
+entries="match selection-match border"
+
+if pgrep -x "fuzzel" -u "$USER" > /dev/null; then
+    pkill -x fuzzel || log_error "Failed to kill fuzzel process"
+    # and move on
+fi
+
+for entry in $entries; do
+    # Not very sure if alpha channels are neccessary here, but just in case
+    sed -i -E "s/^($entry\s*=\s*)([0-9A-Fa-f]{6})([0-9A-Fa-f]{0,2})/\1${colorHex}\3/" "$file" || {
+        log_error "Failed to edit ${file} for entry ${entry}"
+        exit 1
+    }
+done
+
+log_success "fuzzel"