git ls-files (“treegrep:”)

<Zoffix> AlexDaniel: feature request: ability to find to which distro a filename belongs too; aka tree -f | grep XXX :)

In other words: grepping by filename.

This is actually relatively easy. We can use git ls-files -z to get the list of all files, then grep that with a 6lang regex similarly to how Quotable does it right now. There are about 17888 lines to grep through, and this is nothing. Quotable and Unicodable grep over millions of lines with 6lang regexes without any issues.

The only problem is that currently greppable is using perl5 regexes, so it is counter-intuitive to implement another command that does something different. Which kinda suggests that we may want to switch the whole thing to use 6lang regexes…

Start with the existing greppable command and compare how Quotable and Unicodable perform regex searches. Investigate the proposed git ls-files -z filename list and decide whether this feature should use the existing Perl 5 regexes or a consistent 6lang regex approach. Done means users can grep filenames and the regex behavior is clearly defined.