Comment 3 for bug 503670

I could have a look at this in case vila (or anyone else) is not planning to work on this anytime soon.

I was thinking that this could probably be developed as a plugin and in a month or so if there are no issues it could be proposed for a merge.

Regarding the 'bzr grep' command, my understanding is that we want to search through the versioned files, not files contained in the working directory and not history (hgrep? Bug #161250). Is this correct?

hg grep searches history. I am not sure if it has something for searching versioned files.
Does anyone know how git grep behaves?

What are the important command line options that need to be supported? I am assuming it should at least have the commonly used options from unix grep.