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.
foo
% branch shadowing
abort: a branch of the same name already exists (use --force to override)
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
foo
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
foo
changeset: 5:5f8fb06e083e
branch: foo
tag: tip
parent: 4:4909a3732169
parent: 3:bf1bc2f45e83
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: merge
changeset: 4:4909a3732169
branch: foo
parent: 1:b699b1cec9c2
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: modify a branch
changeset: 3:bf1bc2f45e83
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: clear branch name
changeset: 2:67ec16bde7f1
branch: bar
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: change branch name
changeset: 1:b699b1cec9c2
branch: foo
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: add branch name
changeset: 0:be8523e69bf8
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: initial
foo 5:5f8fb06e083e
default 3:bf1bc2f45e83
bar 2:67ec16bde7f1
foo
default
bar
% test for invalid branch cache
rolling back last transaction
changeset: 4:4909a3732169
branch: foo
tag: tip
parent: 1:b699b1cec9c2
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: modify a branch
Invalid branch cache: unknown tip
changeset: 4:4909a3732169c0c20011c4f4b8fdff4e3d89b23f
branch: foo
tag: tip
parent: 1:b699b1cec9c2966b3700de4fef0dc123cd754c31
parent: -1:0000000000000000000000000000000000000000
manifest: 4:d01b250baaa05909152f7ae07d7a649deea0df9a
user: test
date: Mon Jan 12 13:46:40 1970 +0000
files: a
extra: branch=foo
description:
modify a branch
4:4909a3732169
4909a3732169c0c20011c4f4b8fdff4e3d89b23f 4
bf1bc2f45e834c75404d0ddab57d53beab56e2f8 default
4909a3732169c0c20011c4f4b8fdff4e3d89b23f foo
67ec16bde7f1575d523313b9bca000f6a6f12dca bar
% update with no arguments: tipmost revision of the current branch
bf1bc2f45e83
4909a3732169 (foo) tip
abort: branch foobar not found