Implement all of the options for init_repository from libgit.

[atheriel]

This patch should fully implement all of the options currently provided by git_repository_init_options for initializing repositories.

Much of the C code is drawn from libgit's init.c example.

I have made one implementation change: setting the working tree will work like git-init(1) instead of the way it works in libgit, in that it uses an absolute path as opposed to a path relative to the repository. This means that

import pygit2
pygit2.init_repository('.', working_dir = './myproject')

will result in the following directory structure

.
..
.git/
    ...
    config (file with core.worktree = ../myproject/)
    ...
myproject/
    .git (file with content <gitdir: ../.git/>)

as opposed to the default behaviour, which creates

.
..
.git/
    ...
   config (file with core.worktree = ../myproject/)
   ...
   myproject/
        ... files here ... 

A full use of the options might look like the following at the moment:

import pygit2
pygit2.init_repository(
    'dog',
    bare = False,
    template_dir = '/usr/local/git/share/git-core/templates',
    shared = 'umask',
    initial_head = 'master2',
    origin_url = 'http://github.com/atheriel/test',
    working_dir = 'dog2'
)

Let me know if there's anything I else I can do.

Aaron Jacobs
atheriel@gmail.com

[atheriel]

Is this acceptable?

[jdavid]

I made just one comment regarding in-line variable declarations, but there more. Please go through your commit and fix all of them. Thanks.

[jdavid]

done using cffi