Vim script for walking up or down a Scrivener drafts directory (or any directory really).

MyDirectoryNav.vim

function! MyDirectoryNav(direction)
    let theDirectory = fnamemodify(expand('%'),':p:h')          " Should be the /drafts/ directory of a Scrivener project, but will work for anything.
    let thisFile = fnamemodify(expand('%'),':p')                " Path to the current file.
    let theFiles = split(globpath(theDirectory,'*.md'),'\n')    " A list of all the .md files in the directory.
    let thisIndex = index(theFiles, thisFile)                   " the index of the current file in this list.
    if a:direction == 'j'
        let nextFile = get(theFiles, thisIndex + 1, theFiles[0])    " If the direction is down, get the next file or loop to the beginning if the current file is last. 
    else
        let nextFile = get(theFiles, thisIndex - 1, theFiles[-1])   " Likewise for going up.
    endif
    execute "edit " . fnameescape(nextFile)
endfunction
nn <D-∆> :call MyDirectoryNav('j')<CR>
nn <D-˚> :call MyDirectoryNav('k')<CR>

I sync Scrivener projects with a /drafts/ directory where each Scrivener document (usually an individual paragraph of my paper/dissertation) is its own markdown file. Each file is prepended with a number so all the documents are kept in order.

With this little function in my .vimrc file I can quickly go to the next or previous paragraph by hitting alt+cmd+j or alt+cmd+k.