This extends the git_fuitls_readbuffer function to only read in if the
file's modification date is later than the given one. Some code paths
want to check a file's modification date in order to decide whether
they should read it or not. If they do want to read it, another stat
call is done by futils. This function combines these two operations so
we avoid one stat call each time we read a new or updated file.

The git_futils_readbuffer functions is now a wrapper around the new
function.

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

tag.c: fix tiny typo

Fix two memory leaks pointed by valgrind

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

We need really free vectors on index freeing, not only clear.

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

Current implementation of git_reference_rename() removes 'ref' from
loose cache, but not frees it. In result 'ref' is not reachable any more
and we have got memory leak.

Let's re-add 'ref' with corrected name to loose cache instead of
'new_ref' and free 'new_ref' properly.

'rollback' path seems leak too. git_reference_rename() need to be rewritten
for proper resource management.

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

net: link necessary libraries in Solaris

Solaris needs programs to link to socket and nsl in order to use BSD
sockets. Tell CMake to do so, this time for real.

Thanks to boyski for bearing with me through the various iterations of
this patch.

Signed-off-by: Carlos Martín Nieto <carlos@cmartin.tk>

tag: Make git_tag_create_lightweight() accessible to bindings

This a very packed minor release. The usual guilty parties have been
working harder than usual during the holidays -- thanks to everyone
involved!

As always, the updated API docs can be found at:

	http://libgit2.github.com/libgit2/

NEW FEATURES:

	- New OS abstraction layer. This should make all POSIX calls much
	more reliable under Windows.

	- Much faster writes of simple objects (commits, tags, trees) to the
	ODB via in-memory buffering and direct writes, instead of streaming.

	- Unified & simplified API for object creation. All the `create`
	methods now take Objects instead of OIDs to ensure that corrupted
	(dangling) objects cannot be created on the repository.

	- Fully Git-compilant reference renaming (finally!), with
	the already existing `git_reference_rename`.

	- Deletion of config keys with `git_config_delete`

	- Greatly improved index performance when adding new entries

	- Reflog support with the `git_reflog` API

	- Remotes support with the `git_remote` API

	- First parts of the Networking API, including refspecs and
	the transport abstraction layer. (Note that there are no actual
	transports implemented yet)

	- Status support with the `git_status_foreach` and `git_status_file`
	functions.

	- Tons of bugfixes, including the outstanding bug #127 (wrong sort
	ordering when querying tree entries).

KNOWN ISSUES:

	- The reference renaming code leaks memory. This is being worked on
	as part of a reference handling overhaul.

	- The tree-from-index builder has abysmal performance because it
	doesn't handle the Treecache extension yet. This is also being
	worked on.

FULL API CHANGELOG:

	- removed, * modified, + added

	- git_commit_create_o
	- git_commit_create_ov
	- git_reference_create_oid_f
	- git_reference_create_symbolic_f
	- git_reference_rename_f
	- git_tag_create_f
	- git_tag_create_fo
	- git_tag_create_o

	* git_commit_create
	* git_commit_create_v
	* git_config_foreach
	* git_reference_create_oid
	* git_reference_create_symbolic
	* git_reference_rename
	* git_tag_create
	* git_tag_create_frombuffer

	+ git_clearerror
	+ git_config_delete
	+ git_index_uniq
	+ git_odb_hashfile
	+ git_oid_fromstrn
	+ git_reflog_entry_byindex
	+ git_reflog_entry_committer
	+ git_reflog_entry_msg
	+ git_reflog_entry_oidnew
	+ git_reflog_entry_oidold
	+ git_reflog_entrycount
	+ git_reflog_free
	+ git_reflog_read
	+ git_reflog_write
	+ git_refspec_src_match
	+ git_refspec_transform
	+ git_remote_connect
	+ git_remote_fetchspec
	+ git_remote_free
	+ git_remote_get
	+ git_remote_ls
	+ git_remote_name
	+ git_remote_url
	+ git_repository_head_detached
	+ git_repository_head_orphan
	+ git_status_file
	+ git_status_foreach
	+ git_tag_create_lightweight
	+ git_tag_list_match
	+ git_transport_new

More memory leaks

typo: one git_remote_fetchspec should be pushspec

It's not obvious that recurse_tree_entries or recurse_tree_entry
should free a resource that wasn't allocated by them. Do this
explicitely and plug a leak while we're at it.

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

Signed-off-by: Carlos Martín Nieto <carlos@cmartin.tk>

tree: fix insertion of entries with invalid filenames

The old matcher was returning fake matches when given stupid entry
names. E.g.

	`git2` could be matched by `git2   /`, `git2/foobar`, git2/////`
	and other stupid stuff

Fixes #127 (that was quite an outstanding issue).

Rationale:

The tree objects on Git are stored and read following a very specific
sorting algorithm that places folders before files. That original sort
was the sort we were storing on memory, but this sort was being queried
with a binary search that used a simple `strcmp` for comparison, so
there were many instances where the search was failing.

Obviously, the most straightforward way to fix this is changing the
binary search CB to use the same comparison method as the sorting CB.
The problem with this is that the binary search callback compares a path
and an entry, so there is no way to know if the given path is a folder
or a standard file.

How do we work around this? Instead of splitting the `entry_byname`
method in two (one for searching directories and one for searching
normal files), we just assume that the path we are searching for is of
the same kind as the path it's being compared at the moment.

	return git_futils_cmp_path(
		ksearch->filename, ksearch->filename_len, entry->attr & 040000,
        entry->filename, entry->filename_len, entry->attr & 040000);

Since there cannot be a folder and a regular file with the same name on
the same tree, the most basic equality check will always fail
for all comparsions, until our path is compared with the actual entry we
are looking for; in this case, the matching will succeed with the file
type of the entry -- whatever it was initially.

I hope that makes sense.

PS: While I was at it, I switched the cmp methods to use cached values
for the length of each filename. That makes searches and sorts
retardedly fast -- I was wondering the reason of the performance hiccups
on massive trees; it's because of 2*strlen for each comparsion call.

mode field of git_index_entry_unmerged is array of unsigned ints. It's
unsafe to cast pointer to an element of the array to long int *. It may
cause overflow in git_strtol32().

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

Type casting usually points to some trick or bug. It's better not hide
it between useless type castings.

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

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

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>

Signed-off-by: Carlos Martín Nieto <carlos@cmartin.tk>

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>