It's not hosted in a gist. It's hosted at https://github.com/ralight/sqlite3-pcre/, and it doesn't need updating until someone wants to make it work with SQLite4. It's not much code, see [pcre.c](https://github.com/ralight/sqlite3-pcre/blob/master/pcre.c); it just implements the non-implemented SQLite `REGEXP()` function.