Rewritten in Rust

https://zaiste.net/posts/shell-commands-rust/

grex ↓

grex -d 00:12:23:12
^\d\d:\d\d:\d\d:\d\d$

grex is a library as well as a command-line utility that is meant to simplify the often complicated and tedious task of creating regular expressions

bat ↓

Very nice looking cat replacement with syntax coloring and line numbers and pager and vim like search.