vim ale shortcut to add eslint-ignore hint

Question

I've been using vim for years, but I've just started integrating eslint (through ALE). I've found that sometimes I want to be able to quickly add an /* eslint-ignore-next-line */. For example:

 ...
❌    if (m = /^-l(\d+)$/.exec(args[i])) t.len = m[1];
 ...
~/some/dir/file.js [+]          
cond-assign: Expected a conditional expression and instead saw an assignment.

It's really handy that ALE gives you the code at the bottom of the window, but being lazy I want to automate adding the comment/hint:

/* eslint-ignore-next-line cond-assign */

Is there a way to access that information at the bottom of the screen in a vim script/function?

Answer 1

Though not documented, ALE stores lint information in the b:ale_highlight_items variable.

David784's solution didn't work for me because I had customized the location-list text using ALE's g:ale_echo_msg_format configuration option. So I modified it to obtain the information directly from b:ale_highlight_items instead of parsing it out of the location-list.

Here it is:

command! ALEIgnoreEslint call AleIgnoreEslint()
function! AleIgnoreEslint()
  " https://stackoverflow.com/questions/54961318/vim-ale-shortcut-to-add-eslint-ignore-hint
  let l:codes = []
  if (!exists('b:ale_highlight_items'))
    echo 'cannot ignore eslint rule without b:ale_highlight_items'
    return
  endif
  for l:item in b:ale_highlight_items
    if (l:item['lnum']==line('.') && l:item['linter_name']=='eslint')
      let l:code = l:item['code']
      call add(l:codes, l:code)
    endif
  endfor
  if len(l:codes)
    exec 'normal O/* eslint-disable-next-line ' . join(l:codes, ', ') . ' */'
  endif
endfunction