grex
A command-line tool and library for generating regular expressions
...The resulting expression is guaranteed to match the test cases which it was generated from. This project has started as a Rust port of the JavaScript tool regexgen written by Devon Govett. Although a lot of further useful features could be added to it, its development was apparently ceased several years ago. The plan is now to add these new features to grex as Rust really shines when it comes to command-line tools. grex offers all features that regexgen provides, and more. The philosophy of this project is to generate the most specific regular expression possible by default that exactly matches the given input only and nothing else. ...