Add template dir and set gid to repo init

This extends git_repository_init_ext further with support for
initializing the repository from an external template directory
and with support for the "create shared" type flags that make a
set GID repository directory.

This also adds tests for much of the new functionality to the
existing `repo/init.c` test suite.

Also, this adds a bunch of new utility functions including a
very general purpose `git_futils_mkdir` (with the ability to
make paths and to chmod the paths post-creation) and a file
tree copying function `git_futils_cp_r`.  Also, this includes
some new path functions that were useful to keep the code
simple.

1 files changed, 12 insertions, 0 deletions

diff --git a/include/git2/config.h b/include/git2/config.h
index f415fbd9..58a23833 100644
--- a/include/git2/config.h
+++ b/include/git2/config.h
@@ -91,6 +91,18 @@ GIT_EXTERN(int) git_config_find_system(char *system_config_path, size_t length);
 GIT_EXTERN(int) git_config_open_global(git_config **out);
 
 /**
+ * Open the global and system configuration files
+ *
+ * Utility wrapper that finds the global and system configuration files
+ * and opens them into a single prioritized config object that can be
+ * used when accessing config data outside a repository.
+ *
+ * @param out Pointer to store the config instance
+ * @return 0 or an error code
+ */
+GIT_EXTERN(int) git_config_open_outside_repo(git_config **out);
+
+/**
  * Create a configuration file backend for ondisk files
  *
  * These are the normal `.gitconfig` files that Core Git