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In my .vimrc I want to define several autocmd groups. Also, I want to avoid conflicts with any pre-existing groups. How can I list currently defined groups in Vim?

Eugene Yarmash
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    https://vimhelp.org/autocmd.txt.html#autocmd-list – phd Mar 16 '20 at 18:22
  • I guess it's safe to say using a `vimrc_` prefix is almost sure not to generate any conflicts. – filbranden Mar 16 '20 at 19:24
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    @phd That command actually lists auto-commands, not the autocmd groups... Running `autocmd` by itself lists them, but that doesn't appear to be documented. Added an answer. – filbranden Mar 16 '20 at 19:38

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This actually doesn't appear to be documented in Vim's help (only mentions the commands to select or delete a group), but at least on my Vim 8.2.0318, the command :augroup by itself lists all the defined autocmd groups.

I get this on pretty much stock Vim setup:

:augroup
filetypedetect  syntaxset  filetypeplugin  filetypeindent  vimStartup  gzip  matchparen  FileExplorer  Network  tar  Vimball

The :autocmd command, which lists all auto-commands will end up listing groups as well, but it's of course more convenient to get them directly from :augroup.

If you want to get that into a Vim variable, use the execute() function for it:

let groups = split(execute('augroup'))
filbranden
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