Rust grep
Usage: grepr [OPTIONS] <PATTERN> [FILE]...
Arguments:
<PATTERN> Search pattern
[FILE]... Input file(s) [default: -]
Options:
-r, --recursive Recursive search
-c, --count Count occurrences
-v, --invert-match Invert match
-i, --insensitive Case insensitive
-h, --help Print help
-V, --version Print version