util._matcher: speed up regexp matching.
In 4babaa52badf, Benoit made a change that substantially slows matching
when a big .hgignore file is in play, because it calls into the regexp
matching engine potentially hundreds of times per file to be matched.
I've partly rolled back his change, so that we only call into the matcher
once per file, but preserved the ability to report a meaningful error
message if there's a syntax error in the regexp.
abort: Connection refused
255
copy: No such file or directory
changeset: 0:53e17d176ae6
tag: tip
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: test
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
1 files, 1 changesets, 1 total revisions
foo
adding quux
changegroup hook: HG_NODE=34401e0e9971e9720b613d9089ffa9a6eefb3d2d HG_SOURCE=pull HG_URL=static-http://localhost:20059/remote
pulling from static-http://localhost:20059/remote
searching for changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
(run 'hg update' to get a working copy)