Regular expression debugging tool

A tool to help diagnose issues with RunCMake regular expressions by offering an editor with live results matching the haystack (content.txt) against the needle (re.txt).

This utility makes a few assumptions, but further improvement for other workflows is welcome. One assumption is that it is run from this directory (i.e., ./run.sh).

Requirements

The tool currently assumes it is running inside of a tmux session and offers a split which prints the results of matching the regular expression against the content.

The EDITOR environment variable is used to detect the preferred editor, defaulting to nano. If the editor is detected as a Vi-alike (i.e., has vi in its name), both files are automatically opened in separate windows.