Port MSVC specific Waf compilation flags to CMake and remove dynamic dependence to msvcr100.dll on Windows

The '/MT' and '/MTd' flags replace the dynamic link to 'msvcr100.dll' with a static link to 'libcmt.lib'. This has the nice effect to ease the deployment of libgit2 by removing the dependence on 'msvcr100.dll' which is not deployed by default on Windows.

Goodbye Waf. It's been a long ride.

All the custom backend code will be moved to a separate project,
	together with the new MySQL backend.

Remove uneeded arpa/inet.h include

This header isn't needed at all and it shows a lot of warnings on
OpenBSD.

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

Msvc10 fixes

The better solution would probably be to turn the gitfo_lstat /
gitfo_readlink macros into real functions that wrap either lstat or
gitfo_lstat__w32 (and readlink or gitfo_readlink__w32). However, that
would introduce an indirection unless inlined. For now, this is the less
intrusive change.

MSVC supports "inline" only in C++ code, not in C code.

git_tag_create{,_o,_frombuffer} correction and improvement

Commit short message should be the same as git's

Handle Symlinks if they can be handled in Win32. This is not even
compiled. Needs review.

The lstat implementation is modified from core Git.
The readlink implementation is modified from PHP.

Keep the lockfile if we fail to lock it

In git, the short message of a commit is the part of the commit message before 2 consecutive line breaks. In the short message, line breaks are replaced by space characters.

Add a check for the file descriptor in git_filebuf_cleanup. Without
it, an existing lockfile would be deleted if we tried to acquire it
(but failed, as the lockfile already existed).

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

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

Symlinks NEW

rename-reference: use normalized path

config: update the git_config_add_file documentation

Fix compilation warnings in MSVC

fileops.c: fix unused warning v2

It's not clear how git_config and git_config_file relate to one
another. Be more explicit about their relationship in the function
documentation.

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>

When calling gitfo_exists() on a symbolic link, sometimes we need to
simply check whether the link exists and sometimes we need to check
whether the file pointed to by the symlink exists.

Introduce a new function gitfo_shallow_exists that only checks if the
link exists and revert gitfo_exists to the original functionality of
checking whether the file pointed to by the link exists.

This reverts commit df1c98ab6d6171ed63729195bd190b54b67fe530.

As 8a27b6b reverts the exposition of struct stat to the external API, we
do not need - indeed, do not want - struct stat to be in the outer
include layer.

00582bc introduced a change that required the caller of
git_blob_create_fromfile() to pass a struct stat with the stat
information for the file. Several developers pointed out that this would
make life hard for the bindings developers as struct stat isn't widely
supported by other languages.

Make git_blob_create_fromfile() stat the path itself, eliminating the
need for the file to be stat'ed by the caller. This makes
index_init_entry() more costly as the file will be stat'ed twice but
makes life easier for everyone else.

00582bcb introduced a change to git_blob_create_fromfile() that required
the caller to pass a stat struct. This means that we need to include
stat.h higher in the hierarchy of includes.

The entry mode flags for an entry created from a path name were not
correctly written if the entry was a symlink. The st_mode of a statted
symlink is 0120777, however git requires the mode to read 0120000,
because it does not care about permissions of symlinks.

Introduce index_create_mode() that correctly writes the mode flags in
the form expected by git.