merge: skip syntactic path checks in [_checkunknownfile]
We don't need to check the paths syntactically, since they are coming from
diffing the revisions, so hopefully already checked on the way in.
We still need to check what's on the filesystem, to avoid traversing the
symlinks or subdirs, which we can't know about statically.
Also, we use the directory audit to elide [isfileorlink],
this removing ~all lstat calls from hg updates from-empty.
pathutil: use `finddirs_rev_noroot` instead of `parts`
The benefit this brings is very tiny, if it's even there,
since we still didn't get rid of the [parts] computation.
It probably won't be worth it without the subsequent patch
that adds one more use of [finddirs_rev_noroot]
pathutil: add the more efficient finddir iterator
(to be used in subsequent commits)
typing: import unconditionally
This is needed if we're writing python3 signatures.
tests: check how hgweb handles HEAD requests
This test file is loosely based on test-hgweb.t.
HEAD support originally implemented in
fda5a4b853ab.
tests: test hg status --all with hgext/git
There's a TODO item in git/dirstate.py about obtaining clean files in a more
straightforward way, let's first test that status can and does show clean files
at all.