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.
#!/bin/sh
# 0-2-4
# \ \ \
# 1-3-5
#
# rename in #1, content change in #4.
hg init t
cd t
touch 1
touch 2
hg commit -Am init -d "0 0" # 0
hg rename 1 1a
hg commit -m rename -d "0 0" # 1
hg co -C 0
echo unrelated >> 2
hg ci -m unrelated1 -d "0 0" # 2
hg merge --debug 1
hg ci -m merge1 -d "0 0" # 3
hg co -C 2
echo hello >> 1
hg ci -m unrelated2 -d "0 0" # 4
hg co -C 3
hg merge -y --debug 4
hg co -C 4
hg merge -y --debug 3