Allow NERDTreeIgnore to use paths.

[aemonge]

So I know let NERDTreeIgnore=['[^pre].*[[dir]]'] will hide all the directories that don't start with pre as a prefix. But I would like to apply that rule only to directories under bower_components directory.

Ideally something like these two options:

• let NERDTreeIgnore=['bower_components\/[^pre].*[[dir]]']
• let NERDTreeIgnore=['bower_components\/[^pre].*[[path]]']

[lifecrisis]

This may require a new option, or an expansion of the meaning of the g:NERDTreeIgnore option. I'm hesitant to do this.

[PhilRunninger]

@aemonge Disregarding your feature request for a moment, can you confirm your setting is working properly? The way I read it, NERDTree will hide all directories that contain any other character that is not p, r, or e. In other words, it would hide just about everything. To do what you want

... hide all the directories that don't start with pre as a prefix.

involves some uncommon regex complexity. Using this StackOverflow thread and :h /\@! as starting points, you could try this:

:let NERDTreeIgnore=['^\(pre\)\@!.*$']

Of course this doesn't address your feature request, and outside of the bower_components directory, all directories disappear. To get them back, you need to toggle the file filters with the f key, so I understand your request.

I had fun discovering this lesser known capability in regular expressions. Thanks for the question.

[aemonge]

@PhilRunninger, thanks a lot for the correction of the RegExp, endeed the final version would have to use your fixed version with @lifecrisis new feature for path 👍

[juanibiapina]

Why not use NERDTreeAddPathFilter ?

[aemonge]

@juanibiapina could you provide the function that would work ? I'm not really used to vimscript so I don't really know how to do it. So far I've got until here:

call NERDTreeAddPathFilter('FilterNonPre')

function! FilterNonPre(params)
  " echo a:params['path']
  " echo params.AbsolutePathFor()
  " echo a:params.AbsolutePathFor()
  let bu=join(a:params['path']['pathSegments'], '/')
  let w:ja=matchstr(bu, '\c bower_components\/pre')
  if empty(ja)
    echo 'Noooooooooooooooooooooooooooooooooooooooooo'
    echo bu
    return 1
  endif
  " let bu='buu'
  echo bu
  echo '^^^^^ siiiiiiiiiiiii'
  return 1
  " echo a:params['path'].AbsolutePathFor()
endfunction

Trying to get a regex to filter the result. Also I would like to get relative path, or PWD

[aemonge]

I've progressed a little bit, but I finally got stucked with the regex. My updated code is as follows:

call NERDTreeAddPathFilter('FilterNonPre')

function! FilterNonPre(params)
  let pwd=expand('%:p:h')
  let fullPath=join([''] + a:params['path']['pathSegments'], '/')
  let relativePath=substitute(fullPath, pwd, '', '')
  let hasHidableMatch=matchstr(relativePath, '^\bower_components/pre\\@!.*$')

  " echo '============='
  echo relativePath
  echo hasHidableMatch
  " return 0

  if empty(hasHidableMatch)
    return 0
  endif
  return 1
endfunction

My intension is to hide all folder inside (./bower_components) that have not a pre

[juanibiapina]

You can use path.str() to get a full path representation, should make it easier.

For a relative path, check the documentation of path.str() also. I think strForEdit should be relative.

And if you're having trouble with the regexp, do it in two steps, it's more readable anyway. Check if it matches bower_components and then your next thing.

[aemonge]

Ohhh !!! Yes!!! I got complicated without need, OFC ! thanks!

[aemonge]

Finall working result:

call NERDTreeAddPathFilter('FilterNonPre')

function! FilterNonPre(params)
  let pwd=expand('%:p:h')
  let fullPath=join([''] + a:params['path']['pathSegments'], '/')
  let relativePath=substitute(fullPath, pwd, '', '')
  let inBower=matchstr(relativePath, '/bower_components/')

  if !empty(inBower)
    let hasPre=matchstr(relativePath, 'bower_components/pre')
    if empty(hasPre)
      return 1 " ignore
    endif
  endif
  return 0
endfunction

[lifecrisis]

Hey @aemonge, thanks for working through this. Also, @juanibiapina, thanks for helping out.

@aemonge, are you satisfied enough to close the issue?

[aemonge]

Yes !