Feature request: display only lines matching a pattern

[prajnoha]

It would be great if it was possible to filter lines so they contain only the lines that match a defined pattern. This would be similar to less and its &pattern feature. In addition to that, ov could also accept that pattern as a command line argument and do the filtering from the very start of ov's execution. It should also work with all the --follow-* modes.

This way, we could omit the use of grep and similar in the middle of a pipeline like: <some command> | grep --line-buffered pattern | ov --follow-mode