path_auditor: cache names of audited directories
We use a separate cache to avoid problems with
audit = path_auditor(repo.root)
audit("subrepo")
audit("subrepo/file")
whitelisting "subrepo" (which is fine) and then using the same whitelist
with "subrepo/file" (which is not fine).
Since we create a separate path_auditor for every path on the command line,
a "hg add dir/a dir/b dir/c" will still lstat dir 3 times just to audit
the paths.
% no working directory
adding a
adding b
% hg parents
changeset: 2:6cfac479f009
tag: tip
user: test
date: Thu Jan 01 00:00:02 1970 +0000
summary: b
% hg parents a
changeset: 0:b6a1406d8886
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: ab
% hg parents -r 2
changeset: 1:d786049f033a
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: a
% hg parents -r 2 a
changeset: 0:b6a1406d8886
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: ab
% hg parents -r 2 ../a
abort: ../a not under root
% cd dir; hg parents -r 2 ../a
changeset: 0:b6a1406d8886
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: ab
% hg parents -r 2 path:a
changeset: 0:b6a1406d8886
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: ab
% hg parents -r 2 glob:a
abort: can only specify an explicit file name