More implement argument pattern

[Ideflop]

This implements the Pattern option to more.

I put this as a draft for now, because the implementation is not as the one from gnu more. The implementation was discussed on the discord server, but it has been 6 months since then I don't know if anything has changed.

Currently more does this:

Before displaying each file, more searches for the pattern. If the pattern is not found, it displays the message "Pattern not found." Otherwise, it displays the file starting from the pattern match.

[Ideflop]

Some checks are failing with the message "error: the compiler unexpectedly panicked. this is a bug."

However, I am unable to reproduce this bug

Edit: I updated my Rust toolchain and now I get the error when running cargo +nightly clippy --workspace --all-targets --all-features --.

Should I open an issue on the Rust lang repository?

[tertsdiepraam]

If there are no issues for it already, that would be great, especially if you can figure which crate triggers the ICE.

[cakebaker]

I guess it is the following issue: rust-lang/rust#120909

[Ideflop]

Sorry, I forgot I had it in Drafts. I believe it's ready for review.

The compilation issue was also resolved by reverting the commit that introduced the problem: rust-lang/rust#121167

[tertsdiepraam]

I forgot what we already discussed 6 months ago so I might be rehashing stuff, but I can't find this feature in util-linux more, is that correct? This is a nice feature and more doesn't strictly have to follow util-linux in my opinion (because it's not a coreutil), but I want to make sure that we know that we are extending it. There is the +/<pattern> argument, which does the same thing but with a different syntax.

[Ideflop]

Yes, this implements the +/<pattern> argument from the more command.
Currently, Clap doesn't support non-Unix options. There is an issue open at clap-rs/clap#2468.

Therefore, I used what was given in #2320

[tertsdiepraam]

Ah it's my fault then 😄

I think this is a good idea for now. It's nice to at least have the functionality.

[cakebaker]

Thanks for your PR :)