[vim/vim] Syntax-based folding in gVim doesn't work on some Windows machines (Issue #13874)

FEA-eng

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Jan 16, 2024, 1:42:15 PM1/16/24

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Steps to reproduce

Hi,
I have gVim installed on multiple computers with Windows 10. Automatic syntax folding works on most of them but it doesn't work on some. I need it to fold large portions of the code in .inp files. Syntax coloring works but not folding.

For example, lines under *Node should be folded automatically:

vim.JPG (view on web)

My _vimrc file only has this:

syntax on
set foldmethod=syntax

What can I do to fix it?

Expected behaviour

Syntax automatically folded

Version of Vim

8.2.2825

Environment

Windows 10

Logs and stack traces

No response

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Christian Brabandt

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Jan 17, 2024, 11:51:30 AM1/17/24

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syntax based folding doesn't work for all filetypes and may depend on what filetype you are working with. So please get us more information: What is the filetype when it works, and when it does not work? Have you checked the help at :h ft-<filetype>-syntax (sometimes you need to set specific options to make this work, this should be documented in the help for that particular filetype).

set foldmethod=syntax

Note: foldmethod is a buffer-local option, it usually does not make sense to set this in the .vimrc file like you did. It may be overridden by your filetype specific plugins.

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FEA-eng

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Jan 17, 2024, 2:08:38 PM1/17/24

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@chrisbra The filetype both when it works and when it doesn't work is abaqus (and it should be like this, also syntax highlighting works properly, only folding doesn't).

Should I type :h ft-abaqus-syntax ? It shows no results in both cases.

What else can I do to try to enable folding ? It's strange that it works on some machines and doesn't on other.

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Christian Brabandt

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Jan 17, 2024, 2:35:32 PM1/17/24

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The current abaqus syntax script included with Vim does not define syntax based folding. So you must have installed a plugin or similar. Check the output of :sriptnames for both instances.

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FEA-eng

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Jan 17, 2024, 2:58:36 PM1/17/24

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@chrisbra :scriptnames shows the following on the machine where it doesn't work:

  1: ~\_vimrc
  2: E:\Program Files (x86)\Vim\vim82\syntax\syntax.vim
  3: E:\Program Files (x86)\Vim\vim82\syntax\synload.vim
  4: E:\Program Files (x86)\Vim\vim82\syntax\syncolor.vim
  5: E:\Program Files (x86)\Vim\vim82\filetype.vim
  6: E:\Program Files (x86)\Vim\vim82\menu.vim
  7: E:\Program Files (x86)\Vim\vim82\autoload\paste.vim
  8: E:\Program Files (x86)\Vim\vim82\scripts.vim
  9: E:\Program Files (x86)\Vim\vim82\plugin\getscriptPlugin.vim
 10: E:\Program Files (x86)\Vim\vim82\plugin\gzip.vim
 11: E:\Program Files (x86)\Vim\vim82\plugin\logiPat.vim
 12: E:\Program Files (x86)\Vim\vim82\plugin\manpager.vim
 13: E:\Program Files (x86)\Vim\vim82\plugin\matchparen.vim
 14: E:\Program Files (x86)\Vim\vim82\plugin\netrwPlugin.vim
 15: E:\Program Files (x86)\Vim\vim82\plugin\rrhelper.vim
 16: E:\Program Files (x86)\Vim\vim82\plugin\spellfile.vim
 17: E:\Program Files (x86)\Vim\vim82\plugin\tarPlugin.vim
 18: E:\Program Files (x86)\Vim\vim82\plugin\tohtml.vim
 19: E:\Program Files (x86)\Vim\vim82\plugin\vimballPlugin.vim
 20: E:\Program Files (x86)\Vim\vim82\plugin\zipPlugin.vim

and the following on the machine where it works:

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Christian Brabandt

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Jan 17, 2024, 3:28:28 PM1/17/24

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please show this after loading an abaqus buffer

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Gary Johnson

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Jan 17, 2024, 3:30:43 PM1/17/24

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On 2024-01-17, FEA-eng wrote:

Try this on the machines where syntax folding works and where it
doesn't while editing a file for which you expect it to work.

:verbose set foldmethod?

That should tell you where 'foldmethod' was last set and the value
it was set to.

Regards,
Gary

vim-dev ML

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Jan 17, 2024, 3:31:04 PM1/17/24

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FEA-eng

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Jan 17, 2024, 3:51:21 PM1/17/24

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please show this after loading an abaqus buffer

Then both have syntax\abaqus.vim but only the one where it works has ftplugin\abaqus.vim

How can I install it ?

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FEA-eng

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Jan 17, 2024, 3:54:04 PM1/17/24

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On 2024-01-17, FEA-eng wrote: Try this on the machines where syntax folding works and where it doesn't while editing a file for which you expect it to work. :verbose set foldmethod? That should tell you where 'foldmethod' was last set and the value it was set to. Regards, Gary

I get foldmethod=manual on the machine where it doesn't work and this on the machine where it works:

foldmethod=expr
Last set from E:\Program Files\Vim\vim90\ftplugin\abaqus.vim line 44

How can I get the same on the other machine ?

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Christian Brabandt

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Jan 17, 2024, 4:09:52 PM1/17/24

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I get foldmethod=manual on the machine where it doesn't work and this on the machine where it works

Make sure you have filetype plugins enabled. Add a line like this to your _vimrc file:

filetype plugin indent on

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FEA-eng

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Jan 17, 2024, 4:11:57 PM1/17/24

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I get foldmethod=manual on the machine where it doesn't work and this on the machine where it works

Make sure you have filetype plugins enabled. Add a line like this to your _vimrc file:
filetype plugin indent on

It finally works after adding that line. Thank you very much.

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Christian Brabandt

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Jan 17, 2024, 4:13:42 PM1/17/24

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Closed #13874 as not planned.

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FEA-eng

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Jan 17, 2024, 4:18:53 PM1/17/24

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@chrisbra Just one more question if you don't mind - when I unfold a line by pressing the left or right arrow key, can I quickly fold it back somehow ? I've never figured it out.

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Christian Brabandt

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Jan 17, 2024, 4:24:46 PM1/17/24

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You may want to read up on folding in general: :h fold-commands and :h usr_28.txt for some light reading.

In your particular case you probably want the normal mode command zc.

Please ask user-questions at more appropriate questions (like vi.stackexchange.com, reddit or the vim-use mailinglist). We cannot support individual help here. Thanks for understanding.