* gen_pktline() in smart_protocol.c was skipping refspecs that deleted
refs that were not advertised by the server. The new behavior is to
send a delete command with an old-id of zero, which matches the behavior
of the official git client.
* Update test_network_push__delete() in reaction to above fix.
* Obviate messy logic that handles missing push_spec rrefs by canonicalizing
push_spec. After calculate_work(), loid, roid, and rref, are filled in with
exactly what is sent to the server
The diff constructor functions had some confusing names, where the
"old" side of the diff was coming after the "new" side. This
reverses the order in the function name to make it less confusing.
Specifically...
* git_diff_index_to_tree becomes git_diff_tree_to_index
* git_diff_workdir_to_index becomes git_diff_index_to_workdir
* git_diff_workdir_to_tree becomes git_diff_tree_to_workdir
The `git_iterator_reset` command has not been working in all cases
particularly when there is a start and end range. This fixes it
and adds tests for it, and also extends it with the ability to
update the start/end range strings when an iterator is reset.
This removes the need to explicitly pass the repo into iterators
where the repo is implied by the other parameters. This moves
the repo to be owned by the parent struct. Also, this has some
iterator related updates to the internal diff API to lay the
groundwork for checkout improvements.
There are many different broken filemodes in the wild so we need to
protect against them and give something useful up the chain. Don't
fail when reading a tree from the ODB but normalize the mode as best
we can.
As 664 is no longer a mode that we consider to be valid and gets
normalized to 644, we can stop accepting it in the treebuilder. The
library won't expose it to the user, so any invalid modes are a bug.
