patch 9.0.1958: cannot complete option values Commit: https://github.com/vim/vim/commit/900894b09a95398dfc75599e9f0aa2ea25723384 Author: Yee Cheng Chin <ychin.git@gmail.com> Date: Fri Sep 29 20:42:32 2023 +0200 patch 9.0.1958: cannot complete option values Problem: cannot complete option values Solution: Add completion functions for several options Add cmdline tab-completion for setting string options Add tab-completion for setting string options on the cmdline using `:set=` (along with `:set+=` and `:set-=`). The existing tab completion for setting options currently only works when nothing is typed yet, and it only fills in with the existing value, e.g. when the user does `:set diffopt=<Tab>` it will be completed to `set diffopt=internal,filler,closeoff` and nothing else. This isn't too useful as a user usually wants auto-complete to suggest all the possible values, such as 'iblank', or 'algorithm:patience'. For set= and set+=, this adds a new optional callback function for each option that can be invoked when doing completion. This allows for each option to have control over how completion works. For example, in 'diffopt', it will suggest the default enumeration, but if `algorithm:` is selected, it will further suggest different algorithm types like 'meyers' and 'patience'. When using set=, the existing option value will be filled in as the first choice to preserve the existing behavior. When using set+= this won't happen as it doesn't make sense. For flag list options (e.g. 'mouse' and 'guioptions'), completion will take into account existing typed values (and in the case of set+=, the existing option value) to make sure it doesn't suggest duplicates. For set-=, there is a new `ExpandSettingSubtract` function which will handle flag list and comma-separated options smartly, by only suggesting values that currently exist in the option. Note that Vim has some existing code that adds special handling for 'filetype', 'syntax', and misc dir options like 'backupdir'. This change preserves them as they already work, instead of converting to the new callback API for each option. closes: #13182 Signed-off-by: Christian Brabandt <cb@256bit.org> Co-authored-by: Yee Cheng Chin <ychin.git@gmail.com>

" Test for URLs in help documents.
"
" Opens a new window with all found URLS followed by return code from curl
" (anything other than 0 means unreachable)
"
" Written by Christian Brabandt.

func Test_check_URLs()
  if has("win32")
    echoerr "Doesn't work on MS-Windows"
    return
  endif
  if executable('curl')
    " Note: does not follow redirects!
    let s:command = 'curl --silent --fail --output /dev/null --head '
  elseif executable('wget')
    " Note: only allow a couple of redirects
    let s:command = 'wget --quiet -S --spider --max-redirect=2 --timeout=5 --tries=2 -O /dev/null '
  else
    echoerr 'Only works when "curl" or "wget" is available'
    return
  endif

  let pat='\(https\?\|ftp\)://[^\t* ]\+'
  exe 'helpgrep' pat
  helpclose

  let urls = map(getqflist(), 'v:val.text')
  " do not use submatch(1)!
  let urls = map(urls, {key, val -> matchstr(val, pat)})
  " remove examples like user@host (invalid urls)
  let urls = filter(urls, 'v:val !~ "@"')
  " Remove example URLs which are invalid
  let urls = filter(urls, {key, val -> val !~ '\<\(\(my\|some\)\?host\|machine\|hostname\|file\)\>'})
  new
  put =urls
  " remove some more invalid items
  " empty lines
  v/./d
  " remove # anchors
  %s/#.*$//e
  " remove trailing stuff (parenthesis, dot, comma, quotes), but only for HTTP
  " links
  g/^h/s#[.,)'"/>][:.]\?$##
  g#^[hf]t\?tp:/\(/\?\.*\)$#d
  silent! g/ftp://,$/d
  silent! g/=$/d
  let a = getline(1,'$')
  let a = uniq(sort(a))
  %d
  call setline(1, a)

  " Do the testing.
  set nomore
  %s/.*/\=TestURL(submatch(0))/

  " highlight the failures
  /.* \([0-9]*[1-9]\|[0-9]\{2,}\)$
endfunc

func TestURL(url)
  " Relies on the return code to determine whether a page is valid
  echom printf("Testing URL: %d/%d %s", line('.'), line('$'), a:url)
  call system(s:command . shellescape(a:url))
  return printf("%s %d", a:url, v:shell_error)
endfunc

call Test_check_URLs()