emoji regex generator
this is a small program i wrote to generate a size-optimized regular expression for matching emoji. i use this on a discord server (sorry) that has a channel for emoji-based polls. we set up the YAGPDB bot with some custom commands (which are limited to roughly ten thousand characters) to do so. since it's built roughly as a one-off tool for this, it outputs the language of the scripting system the bot uses, but this is mostly irrelevant.
requires fennel (tested on version 1.0) running on lua 5.4.
$ fennel make-regex.fnl > regex.txt
it reads a list of emoji from
emoji-test.txt, which can be obtained from the
unicode consortium. the code for generating the output is near the end of the
file, and the configuration for how the regex is optimized (which is particular
to the data set) is placed at the top.