res/dummy/a and refs/stash must pass. The other rules are already
tested by the rest of the checks.

Signed-off-by: Carlos Martín Nieto <cmn@elego.de>

Allow any well-formed reference name to live under refs/ removing the
condition that they be under refs/{heads,tags,remotes}/ as was the
design of git.

An exception is made for HEAD which is allowed to contain an OID
reference in detached HEAD state.

Signed-off-by: Carlos Martín Nieto <cmn@elego.de>

Internal methods are static and without the git prefix.
'Force' methods have a `_f` prefix to match the other 'force' methods.

Signed-off-by: Carlos Martín Nieto <cmn@elego.de>

Signed-off-by: Carlos Martín Nieto <cmn@elego.de>

Signed-off-by: Carlos Martín Nieto <cmn@elego.de>

Signed-off-by: Carlos Martín Nieto <cmn@elego.de>

Signed-off-by: Carlos Martín Nieto <cmn@elego.de>

Signed-off-by: Carlos Martín Nieto <cmn@elego.de>

Add internal reference create and rename functions which take a force
parameter, telling them to overwrite an existing reference if it
exists.

These functions try to update the reference if it's of the same type
as the one it's going to be replaced by. Otherwise the old reference
becomes invalid.

Signed-off-by: Carlos Martín Nieto <cmn@elego.de>

Signed-off-by: Carlos Martín Nieto <cmn@elego.de>

Apologies for the massive changes in the external API (that's my fault),
and for the terrible codename for this release (that's @tclem's fault).

The detailed overview for the major API changes can be found in the
commit at 72a3fe42.

Major new features in this release:

	- Real caching and refcounting on parsed objects
	- Real caching and refcounting on objects read from the ODB
	- Streaming writes & reads from the ODB
	- Single-method writes for all object types
	- The external API is now partially thread-safe
	- Improved reference handling
	- New method to list references
	- ZLib is now built-in
	- Improvements to the Revision Walker
	- Tons of bug fixes

Thanks to all the contributors who make this possible.

Signed-off-by: Vicent Marti <tanoku@gmail.com>

List all the references in the repository, calling a custom
callback for each one.

The listed references may be filtered by type, or using
a bitwise OR of several types. Use the magic value
`GIT_REF_LISTALL` to obtain all references, including
packed ones.

The `callback` function will be called for each of the references
in the repository, and will receive the name of the reference and
the `payload` value passed to this method.

Fix the doxygen comments for git_index_open_inrepo(). Previously they
referred to a param index_path and omitted index (probably a c&p
error).

The current behaviour of git_index_open{bare,inrepo}() is unexpected.
When an index is opened, an in-memory index object is created that is
linked to the index discovered by git_repository_open(). However, this
index object is empty, as the on-disk index is not read. To fully open
the on-disk index file, git_index_read() has to be called. This leads to
confusing behaviour. Consider the following code:

	git_index *idx;
	git_index_open_inrepo(&idx, repo);
	git_index_write(idx);

You would expect this to have no effect, as the index is never
ostensibly manipulated. However, what actually happens is that the index
entries are removed from the on-disk index because the empty in-memory
index object created by open_inrepo() is written back to the disk.

This patch reads the index after opening it.

Fix a doxygen typo ("@para" instead of "@param") in odb.h

Fix a few minor typos in the documentation of the GIT_ERROR codes.

Temporary files when doing streaming writes are now stored inside the
Objects folder, to prevent issues when moving files between
disks/partitions.

Add support for block writes to the ODB again (for those backends that
cannot implement streaming).

MSVC doesn't swallow that.

In the same spirit that git_repository_lookup is no longer available,
add wrappers so the users don't have to cast when closing their
objects.

Signed-off-by: Carlos Martín Nieto <cmn@elego.de>