branchcache: add a "pure topological head" fast path
In a narrow but actually quick common case, all topological heads are all on
the same branch and all open. In this case, computing the branch map is very
simple. We can quickly detect situation where this situation will not change.
So we update the V3 format to be able to express this situation and upgrade the
update code to detect we remains in that mode.
The branch cache is populated with the actual value when the branch map is
accessed, but the update_disk method can do the update without needing to
populate it.
" $Id: CVSAnnotate.vim,v 1.5 2002/10/01 21:34:02 rhiestan Exp $
" Vim syntax file
" Language: CVS annotate output
" Maintainer: Bob Hiestand <bob@hiestandfamily.org>
" Last Change: $Date: 2002/10/01 21:34:02 $
" Remark: Used by the cvscommand plugin. Originally written by Mathieu
" Clabaut
if version < 600
syntax clear
elseif exists("b:current_syntax")
finish
endif
syn match cvsDate /\S\S\S \S\+ \d\+ \d\+:\d\+:\d\+ \d\+ [+-]\?\d\+/ contained
syn match cvsName /^\s*\S\+ / contained nextgroup=cvsVer
syn match cvsVer /\d\+ / contained nextgroup=cvsDate
syn region cvsHead start="^" end=":" contains=cvsVer,cvsName,cvsDate
if !exists("did_cvsannotate_syntax_inits")
let did_cvsannotate_syntax_inits = 1
hi link cvsText String
hi link cvsDate Comment
hi link cvsName Type
hi link cvsVer Statement
endif
let b:current_syntax="CVSAnnotate"