view contrib/vim/HGAnnotate.vim @ 44593:496868f1030c

rust-matchers: use the `regex` crate

Instead of falling back to Python when a code path with "ignore" functionality
is reached and `Re2` is not installed, the default compilation (i.e. without
the `with-re2` feature) will use the `regex` crate for all regular expressions
business.

As with the introduction of `Re2` in a previous series, this yields a big
performance boost compared to the Python + C code in `status`, `diff`, `commit`,
`update`, and maybe others.

For now `Re2` looks to be faster at compiling the DFA (1.5ms vs 5ms for
Netbeans' `.hgignore`) and a bit faster in actual use: (123ms vs 137ms for
the parallel traversal of Netbeans' clean repo). I am in talks with the author
of `regex` to see whether that performance difference is a bug, a "won't fix",
or a tuning issue.

The `regex` crate is already one of our dependencies and using this code does
not require any additional work from the end-user than to use the Rust
extensions.

Differential Revision: https://phab.mercurial-scm.org/D8323

" $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"