index_initialize() calls assert() for arguments on its own. No need to
call it twice.

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>

Remove dummy wrapper around git_vector_sort().

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>

git_vector_bsearch2() calls git_vector_sort(). No need to call it
directly.

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>

git_index_clear() frees index->entries and index->unmerged. No need to
free it once again.

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>

Add parrot-libgit2 to the list of language bindings in the readme

Fix more memory leaks

reference_rename: make sure old_name gets freed

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

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

Signed-off-by: schu <schu-github@schulog.org>

Finish to hide git_pkt from external API.

reflog: Fix reflog writer/reader

Some of the WIP API calls have been hidden in preparation for the next
minor release.

 - Use a space to separate oids and signature
 - Enforce test coverage
 - Make test run in a temporary folder in order not to alter the test repository

Fix MSVC compilation warning

The `hashfile` function has been moved to ODB, next to `git_odb_hash`.

Global state has been removed from the dirent call in `status.c`,
because global state is killing the rainforest and causing global
warming.

Throws GIT_ENOTFOUND error if given a filename that is not in
HEAD, index, nor the work tree.

Refactored copy of test repo to a function.

Add git_status_file to be able to retrieve status of single file by
supplying a path.

Add git_status_foreach() to run a callback on each file passing the path
and a status value.

Add git_status_hashfile() to get blob's object id for a file without adding
it to the object database or needing a repository at all.
This functionality is similar to `git hash-object` without '-w'.

Ntk/fix win32 specs

The direct-writes commit left some (slow) internals methods that
were no longer needed. These have been removed.

Also, the Reflog code was using the old `git_signature__write`, so
it has been rewritten to use a normal buffer and the new `writebuf`
signature writer. It's now slightly simpler and faster.

DIRECT WRITES ARE BACK AND FASTER THAN EVER. The streaming writer to the
ODB was an overkill for the smaller objects like Commit and Tags; most
of the streaming logic was taking too long.

This commit makes Commits, Tags and Trees to be built-up in memory, and
then written to disk in 2 pushes (header + data), instead of streaming
everything.

This is *always* faster, even for big files (since the git_filebuf class
still does streaming writes when the memory cache overflows). This is
also a gazillion lines of code smaller, because we don't have to
precompute the final size of the object before starting the stream (this
was kind of defeating the point of streaming, anyway).

Blobs are still written with full streaming instead of loading them in
memory, since this is still the fastest way.

A new `git_buf` class has been added. It's missing some features, but
it'll get there.