Add git status in the files picker, similar to the explorer

[chrisgrieser]

I prefer using the files picker over the explorer, but still wanted to see which files were changed of the files. Figured out, with the custom format function, this is indeed possible.

local changedInfo = {}
local gitDir = Snacks.git.get_root()
if gitDir then
	local gitStatus = vim.system({ "git", "status", "--porcelain", "." }):wait().stdout
	local changes = vim.split(gitStatus or "", "\n", { trimempty = true })
	vim.iter(changes):each(function(line)
		local relPath = line:sub(4)
		local absPath = gitDir .. "/" .. relPath
		local change = line:sub(1, 2)
		changedInfo[absPath] = change
	end)
end

Snacks.picker.files {
	format = function(item, picker)
		local itemPath = Snacks.picker.util.path(item)
		item.status = changedInfo[itemPath]
		return require("snacks.picker.format").file(item, picker)
	end,
}