The easiest thing to do would probably just to do :e after your :w. :e will re-read the file, wiping the undo buffer.
Max > -----Original Message----- > From: Phil Edwards [mailto:[EMAIL PROTECTED] > Sent: Monday, February 05, 2007 9:26 AM > To: [email protected] > Subject: Clearing undo history after a file write > > After writing out a file, I would (sometimes, not always) like to > prevent 'u' from undoing past the :w into old changes, e.g., > > - change #1 > - change #2 > - :w > - change #3 > - change #4 > - 'u' undoes #4 and then #3, but then stops > > This seems like such a simple thing, but to my surprise it's less > trivial than I thought it would be. > > The only thing in ":help undo" and its related tags which seems to be > relevant is the undolevels variable. So maybe something like > > - copy undolevels into some temp variable // I don't remember the > "let" syntax offhand > - set undolevels=-1 > - set undolevels=temp_holding_variable > > would work? A value of -1 disables undo altogether, so would this > sequence kill the history and start it from scratch? > > > -phil
