Dominique Pellé wrote:
Christian Brabandt wrote:
Hi SungHyun!
On Do, 03 Jun 2010, SungHyun Nam wrote:
With vim-7.3 (+ 'undofile'):
I guess I could remove a undofile and run ':e' to do this. Maybe
I can make a mapping with some vim script, but...
Is there any easy way to purge 'persistence undo' history?
Try setting ul=-1
I tried this:
:set undolevels?
undolevels=4000
:set undolevels=-1
:set undolevels=4000
And the undo history was *not* purged. Undo history is
only purged if I edit something in between the 2
":set undolevels=...":
:set undolevels=-1
.. edit something...
:set undolevels=4000
(undo history is now purged)
I'm not sure how useful it is to be able to purge undo history anyway.
I don't think I would need to do that. What I would find more
useful, when performing multiple undos with persistent-undo, is to
display a message such as:
"undo reached state where file was last read/written"
... so that user is warned when doing multiple undos that it can
go back in time earlier than when file was last read/written if he
continues to undo.
Well, it might be just my editing style. When I edit a C
source and compile (and test), I purged the undo history (and
maybe checkin to GIT repo). And edit again, if something is
wrong, I just pressed 'u' until I return to purged state. So to
me, even the warning message is not perfect, because I want to go
back fast (don't want to check message while I press 'u').
And I made a function, it works for me.
func! util#purgeUndoHistory()
let file = undofile(expand('%:p'))
if filereadable(file)
let oldundofile = &l:undofile
setl noundofile
silent! exec "!rm -f ".file
e
let &l:undofile = oldundofile
endif
endfunc
I see an item added recently on the todo list which would also be useful:
- undofile: keep markers where the file was written/read, so that it's easy to
go back to a saved version of the file ":earlier 1file"?
Cheers
-- Dominique
Thanks,
namsh
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