go-grepper

go-grepper is a small for-fun CLI tool written in Go to find lines in text using regex. Matches in lines will be colored red for highlighting.

The tool matches the behaviour of the linux command line tool grep and relies on the Go primitives for concurrency through goroutines and channels.

Install

Simply install directly from github

go install github.com/TheisFerre/go-grepper

To verify installation run

go-grepper --help

Usage

go-grepper can be used either from a linux pipe or from a file directly. It offers regex based pattern matching.

Using go-grepper from a linux pipe

To use go-grepper to read from a linux pipe, the following command is available:

go-grepper match pipe <regex pattern>

To illustrate how it works, we can use go-grepper inside this git directory to find all files that start with go:

ls | go-grepper match pipe '^go'

The result can be seen in the picure below

Using go-grepper to read a file

To use go-grepper to read from a file, the following command is available:

go-grepper match file <file name> <regex pattern>

As an example, we can use the file lorem-ipsum.txt in this repository to find all the cases that matches the following regex pattern [E|e]rat dolor. Which means that the first letter E can be upper or lowercase and then it should match the rest exact.

go-grepper match file lorem-ipsum.txt '[E|e]rat dolor'

The result can be seen in the picure below