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.
quiet:
--- a/foo Mon Jan 12 13:46:40 1970 +0000
+++ b/foo Mon Jan 12 13:46:41 1970 +0000
@@ -1,1 +1,1 @@ bar
-bar
+foobar
normal:
diff -r 74de3f1392e2 -r b8b5f023a6ad foo
--- a/foo Mon Jan 12 13:46:40 1970 +0000
+++ b/foo Mon Jan 12 13:46:41 1970 +0000
@@ -1,1 +1,1 @@ bar
-bar
+foobar
verbose:
diff -r 74de3f1392e2 -r b8b5f023a6ad foo
--- a/foo Mon Jan 12 13:46:40 1970 +0000
+++ b/foo Mon Jan 12 13:46:41 1970 +0000
@@ -1,1 +1,1 @@ bar
-bar
+foobar
debug:
diff -r 74de3f1392e2d67856fb155963441f2610494e1a -r b8b5f023a6ad77fc378bd95cf3fa00cd1414d107 foo
--- a/foo Mon Jan 12 13:46:40 1970 +0000
+++ b/foo Mon Jan 12 13:46:41 1970 +0000
@@ -1,1 +1,1 @@ bar
-bar
+foobar