Find a file (via recursive directory search) in Vim

You don't need a plugin only for this function, below code snippet is enough.

function! FindFiles()
    call inputsave()
    let l:dir = input("Find file in: ", expand("%:p:h"), "dir")
    call inputrestore()
    if l:dir != ""
        call inputsave()
        let l:file = input("File name: ")
        call inputrestore()
        let l:nf = 'find '.l:dir.' -type f -iname '.l:file.' -exec grep -nH -m 1 ".*" {} \;'
        lexpr system(l:nf)
    endif
endfunction
nnoremap <silent> <leader>fo :call FindFiles()<CR>

Run:

:args `find . -name '*xml'`

Vim will run the shell command in backticks, put the list of files to arglist and open the first file. Then you can use :args to view the arglist (i.e. list the files found) and :n and :N to navigate forward and bacwards through the files in arglist. See https://vimhelp.org/editing.txt.html#%7Barglist%7D and https://vimhelp.org/editing.txt.html#backtick-expansion

ag tool and corresponding Ag vim plugin solves this problem perfectly:

To find a file using some pattern use:

AgFile! pattern

It will open quickfix window with results where you can choose.

You can add vim keybinding to call this command using selected word as a pattern.

nnoremap <silent> <C-h> :AgFile! '<C-R><C-W>'<CR>
vnoremap <silent> <C-h> y :AgFile! '<C-R>"'<CR>