This is a (currently extremely basic) ripgrep / silver searcher / ack / grep-like tool. It scans for a pattern recursively from the current directory or the passed paths.
It's written in C++ and uses Google's RE2 library for regex matching.
It's written to the defaults I'd prefer — e.g. no colors, but uses bold when outputting to a tty. Some light effort is made to be UTF8-aware (and RE2 is itself UTF8-aware), but there are probably bugs.
Edit the Makefile to suit your platform. Make sure that your CPATH and
LIBRARY_PATH (or equivalent on your platform) are set up locally or
add them to the Makefile; as distributed, it assumes that re2/re2.h is
on your include path and libre2 is on your library path.
Then simply:
make && sudo make install