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.

     1

#!/bin/sh

     2

     3

hg init

     4

touch unknown

     5

     6

touch a

     7

hg add a

     8

hg ci -m "1" -d "1000000 0"

     9

    10

touch b

    11

hg add b

    12

hg ci -m "2" -d "1000000 0"

    13

    14

echo %% Should show unknown

    15

hg status

    16

hg revert -r 0 --all

    17

echo %% Should show unknown and b removed

    18

hg status

    19

echo %% Should show a and unknown

    20

ls