contrib/vim/HGAnnotate.vim

convert/svn: do not try converting empty head revisions (issue3347)

Subversion conversion works by picking trunk and branches heads, computing a
revision graph from them and converting the selected commits. By design we fail
to convert empty revisions so we have to be careful when discovering the
revision graph. In this particular issue, the source svn repository was a
partial mirror made by svnsync. The funny part is svnsync preserves all
revisions including empty ones. Also, we trusted ra.stat(path,
stop).created_rev to give us the latest revision with changes in path history
up to stop. This assumption broke at least when path is '', that is the
repository root, which always returned 'stop' revision despited being empty.

The workaround is to first trust ra.stat() but if the returned revision appear
empty, search the whole path history from stop to r1 until some changes are
found.

" $Id: CVSAnnotate.vim,v 1.5 2002/10/01 21:34:02 rhiestan Exp $
" Vim syntax file
" Language:	CVS annotate output
" Maintainer:	Bob Hiestand <[e-mail]>
" 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"