codesearch 0.0~hg20120502-3 (riscv64 binary) in ubuntu focal

 Code Search is a tool for indexing and then performing regular expression
 searches over large bodies of source code. It is a set of command-line
 programs written in Go.
 .
 For background and an overview of the commands, see Regular Expression
 Matching with a Trigram Index:
 http://swtch.com/~rsc/regexp/regexp4.html