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 http://swtch.com/~rsc/regexp/regexp4.html. To install: go get github.com/google/codesearch/cmd/... Use "go get -u" to update an existing installation. Russ Cox rsc@swtch.com June 2015