largefiles: don't let update leave wrong largefiles in wd if fetch fails
Situations where a largefile for some reason wasn't available sometimes caused
wrong largefile content and state. It has mostly been seen when interrupting
download of largefiles ... and when introducing programming errors.
Instead we now make sure to delete the old and wrong largefile. A missing file
is a well-known error condition and much more reasonable way to handle the
situation.
largefiles: missing largefiles should not be committed as removed
Largefiles can easily become missing - for example if it simply isn't available
or the download fail. It might even be convenient to be able to work that way
in some cases.
But commiting missing largefiles as if they had been 'hg remove'd is plain wrong.
largefiles: don't assume that .hg/largefiles/ still exists
It might not have been created and it might have been removed.
largefiles: getstandinmatcher should not depend on existence of directories
Looking for a (potentially empty) directory was not reliable - both because it
is a reasonable assumption that empty directories can be removed and because it
wasn't created in all cases ... such as when pulling to an existing repository.
tests: don't rely on broken behaviour in test-largefiles-cache.t
The test relied on the bug that 'pull largefiles from branchheads' didn't pull
any largefiles from tip revision when it seemed like no largefiles had been
checked out before.
largefiles: fix download of largefiles from an empty list of changesets
The empty list was interpreted as all revisions - just like None is.
The empty list is now handled explicitly.
largefiles: fix off-by-one error on pull --all-largefiles
Test output is changed in a case where one revision was pulled, but because of
the off-by-one error it thought that 0 revisions were pulled ... and because of
another bug it thus (tried to) fetch largefiles for all revisions.
After this change it no longer reports failure when it failed while trying to
fetch largefiles it shouldn't fetch. Largefiles that it shouldn't fetch but
managed to fetch anyway will now correctly be missing later on.
This change thus resolves some of unexplained test output introduced in
1e4eb1faba6e.
tests: remove glob lines which unnecessary match / for \ on windows
This lines were reported as unnecessary when running the tests on windows
because the path was already printed with a slash and not a backslash.
tests: append glob to filename output when required for windows
The test failed on windows before this patch.