Prioritize alternate file buffer in buffers and smart picker

[tbung]

Is there a way to have the buffers and smart pickers always sort the alternate file on top, so that opening the smart picker and immediately pressing enter goes to the previous buffer? Alternatively, is there a way to influence the score via transforms or filters or would an entire custom picker be the only way to achieve this?

[tbung]

I somewhat got the smart picker to work by sorting on source_id (because buffers is first in the list) and flags (because the alternate file flag # sorts first out of all the flags).

  Snacks.picker.smart({
    multi = { { source = "buffers", current = false }, "files" },
    sort = {
      fields = { "source_id:asc", "flags", "score:desc", "#text", "idx" },
    },
  })

But it has the issue, that it is quite aggressive and will keep showing buffers on top even if something else fits better to what you type.

Ideally there would be a way to set an initial sort order and as soon as you start typing it sorts by score and drops the other order.

[folke]

So something like this:

Snacks.picker.smart({
  matcher = {
    on_match = function(_, item)
      if item.flags and item.flags:find("#") then
        item.score = 20000
      end
    end
  }
})

[tbung]

That gets overwritten immediately:

snacks.nvim/lua/snacks/picker/core/matcher.lua

Lines 341 to 345 in c61114f

	self.opts.on_match(self, item)
	end
	end
	item.match_tick, item.score, item.match_topk = self.tick, score, nil
	return score > 0

It's not a huge deal if there currently is no way to do this, I really don't want to waste your time with this if you have better things to do. If you are open to it I'll make an issue about sort/score customization or even just a buffers.alternate_first option and write up a PR if you agree to a solution. Particularly the last one should be easy enough to add on top of buffers.sort_lastused.

[dpetka2001]

If the clause about self.opts.on_match gets moved to the start of the if clause about if score ~= 0, then in your personal configuration you could change either item.score_add or item.score_mul to manipulate the score of the item. I'm unsure however if that has any other side-effects. I've no idea how on_match should be used.

[folke]

Changed it so that the score gets set right before calling on_match

[tbung]

Perfect, thank you so much!