vim, meson and tabulations story [solved]

[netfab]

My vim is configured to NOT insert spaces for each tabulation, i.e. tabulations are tabulations.
Years ago I wrote some meson.build files.
In those files tabulations are tabulations.

Today, if I edit these files, and press the TAB key, each tabulation is replaced by spaces.
If I open a new file using vim :

Code: Select all

$ vim /tmp/foo

Each tabulation is a tabulation.

If I open a new meson.build file :

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$ vim /tmp/meson.build

Each tabulation is replaced by spaces.

My question : is there something that change on gentoo in default vim configuration regarding meson.build files ? where ?

Thank you.

[Banana]

maybe the command :set can show anything to analyse.
Run it on both and compare.

[Hu]

This sounds like something is setting expandtab on you. Various filetype plugins do this, including /usr/share/vim/vim91/ftplugin/meson.vim, which seems like a likely culprit, given the initial report. As I read that vim file, this is because someone considers expandtab to be "Meson recommended style." Fortunately, the author included a hook you can use to override this:

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if get(g:, "meson_recommended_style", 1)
  setlocal expandtab
  setlocal shiftwidth=2
  setlocal softtabstop=2
  let b:undo_ftplugin .= " | setl et< sts< sw<"
endif

Therefore, set that variable to 0, and this plugin should stop applying these settings. Beware that if this is Meson recommended style, then deviating from it may cause other Meson users to complain when reading content you wrote under the override, or even cause syntax errors if the parser reacts badly to mixing tabs and spaces in a single file, and you edit a "recommended style" file while using this override.

[Banana]

And according to portagefilelist there maybe multiple packages and files involved. I haven't check the contents of those.

https://www.portagefilelist.de/index.ph ... im#panchor

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/usr/share/vim/vimfiles/indent/meson.vim => dev-build/meson
/usr/share/nvim/runtime/syntax/meson.vim => app-editors/neovim
/usr/share/nvim/runtime/syntax/meson.vim => app-editors/neovim
/usr/share/vim/vim91/syntax/meson.vim => app-editors/vim-core

[netfab]

maybe the command :set can show anything to analyse.
Run it on both and compare.

Yes, this comparison shows that expandtab was forced, even if I set noexpandtab in my ~/.vimrc.

This sounds like something is setting expandtab on you. Various filetype plugins do this, including /usr/share/vim/vim91/ftplugin/meson.vim, which seems like a likely culprit, given the initial report. As I read that vim file, this is because someone considers expandtab to be "Meson recommended style." Fortunately, the author included a hook you can use to override this:

Code: Select all

if get(g:, "meson_recommended_style", 1)
  setlocal expandtab
  setlocal shiftwidth=2
  setlocal softtabstop=2
  let b:undo_ftplugin .= " | setl et< sts< sw<"
endif

Therefore, set that variable to 0, and this plugin should stop applying these settings. Beware that if this is Meson recommended style, then deviating from it may cause other Meson users to complain when reading content you wrote under the override, or even cause syntax errors if the parser reacts badly to mixing tabs and spaces in a single file, and you edit a "recommended style" file while using this override.

Thank you, that's it. I plan to convert all meson files, but it drove me crazy to not understand. Internal vim change without any notification.