Enable Neomake eslint per buffer per project

javascript.vim

" Enable eslint for given project buffer
" Store current cwd
let s:prev_cwd = getcwd()

" change path to project root for current buffer
let s:project_cwd = split(expand('%:p:h'), "js")[0]
lcd `=s:project_cwd`

" Assign proper eslint vars for this buffer
let s:eslint_path = system('PATH=$(npm bin):$PATH && which eslint')
let b:neomake_javascript_eslint_exe = substitute(s:eslint_path, '^\n*\s*\(.\{-}\)\n*\s*$', '\1', '')
let b:neomake_javascript_enabled_makers = ['eslint']

" change back to previous cwd
lcd `=s:prev_cwd`