created 2001 · complexity intermediate · author Benji Fisher · version 6.0
A file type plugin (ftplugin) is a script that is run automatically when Vim detects the type of file when the file is created or opened. The type can be detected from the file name (for example, file sample.c has file type c), or from the file contents.
For an overview of file type plugins see :help ftplugins.
Disabling default ftplugins
If you have your own ftplugins, and you want to disable all the default ones, then do not include a check for b:did_ftplugin in your ftplugin files, and add the line
:autocmd BufEnter * let b:did_ftplugin = 1
to your vimrc, before the :filetype ftplugin on line.
Setting a default filetype
When you edit a blank buffer (for example, just after starting Vim, or as a result of the :new command), the buffer will have no filetype so there will be no syntax highlighting or other ftplugin assistance.
You can check the filetype of the current buffer with command:
You can set the filetype of the current buffer with a command like this example:
Another approach is to assign a file name when creating the blank buffer, for example, by entering a command like gvim mynewfile.py to start Vim, or with commands like these from within Vim:
:new mynewfile.py :edit mynewfile.py :tabnew mynewfile.py
Alternatively, the following in your vimrc will set a default filetype for all new buffers:
" default filetype let g:do_filetype = 0 au GUIEnter,BufAdd * if expand('<afile>') == "" | let g:do_filetype = 1 | endif au BufEnter * if g:do_filetype | setf python | let g:do_filetype = 0 | endif
GUIEnter is for the buffer that is opened on startup. BufAdd is for new blank buffers.
Why the need to use a global variable, and not set the filetype immediately, is to my understanding, because the buffer hasn't been fully created when the autocmd is triggered.
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