Is there a
.vimrc setting to automatically remove trailing whitespace when saving a file?
Ideally (to be safe) I would like to only have this functionality for certain files, e.g.
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To keep cursor position use something like:
function! <SID>StripTrailingWhitespaces() let l = line(".") let c = col(".") %s/\s\+$//e call cursor(l, c) endfun
else cursor would end up at beginning of line of last replace after save.
Example: You have a space at end of line
122, you are on line
:w. Not restoring position, would result in cursor ending up at beginning of line
122 thus killing work flow.
Set up call to function using
autocmd, some examples:
" Using file extension autocmd BufWritePre *.h,*.c,*.java :call <SID>StripTrailingWhitespaces() " Often files are not necessarily identified by extension, if so use e.g.: autocmd BufWritePre * if &ft =~ 'sh\|perl\|python' | :call <SID>StripTrailingWhitespaces() | endif " Or if you want it to be called when file-type i set autocmd FileType sh,perl,python :call <SID>StripTrailingWhitespaces() " etc.
One can also use, but not needed in this case, getpos() by:
let save_cursor = getpos(".") " Some replace command call setpos('.', save_cursor) " To list values to variables use: let [bufnum, lnum, col, off] = getpos(".")
My DeleteTrailingWhitespace plugin does this and, in contrast to the various simple
:autocmds floating around, also handles special cases, can query the user, or abort writes with trailing whitespace.
The plugin page contains links to alternatives; there's also a large discussion on the Vim Tips Wiki.