[libgit2-glib] Add ggit_repository_discover_full

[Jesse van den Kieboom <jessevdk src gnome org>]

commit 0a66454cc2fc2333bbe41772e8508e617ac6a91b
Author: Jesse van den Kieboom <jessevdk gnome org>
Date:   Sun Nov 6 01:50:44 2016 -0800

    Add ggit_repository_discover_full
    
    https://bugzilla.gnome.org/show_bug.cgi?id=772837

 libgit2-glib/ggit-repository.c |   39 ++++++++++++++++++++++++++++++++++++---
 libgit2-glib/ggit-repository.h |    5 +++++
 2 files changed, 41 insertions(+), 3 deletions(-)
---
diff --git a/libgit2-glib/ggit-repository.c b/libgit2-glib/ggit-repository.c
index 90ded1a..c295c67 100644
--- a/libgit2-glib/ggit-repository.c
+++ b/libgit2-glib/ggit-repository.c
@@ -956,24 +956,57 @@ GFile *
 ggit_repository_discover (GFile   *location,
                           GError **error)
 {
+       g_return_val_if_fail (G_IS_FILE (location), NULL);
+       g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
+       return ggit_repository_discover_full (location, FALSE, NULL, error);
+}
+
+/**
+ * ggit_repository_discover_full:
+ * @location: the base location where the lookup starts.
+ * @across_fs: indictaes whether lookup will work across filesystem devices.
+ * @ceiling_dirs: (array zero-terminated=1) (allow-none): a list of absolute paths
+ *   at which lookup will stop when reached, or %NULL.
+ * @error: a #GError for error reporting, or %NULL.
+ *
+ * Looks for a git repository.
+ *
+ * The lookup starts from @path and walks up the parent directories
+ * and stops when a repository is found.
+ *
+ * Returns: (transfer full): the repository location.
+ */
+GFile *
+ggit_repository_discover_full (GFile        *location,
+                               gboolean      across_fs,
+                               const gchar **ceiling_dirs,
+                               GError      **error)
+{
        gchar *path;
        gint ret;
        git_buf buf = {0,};
        GFile *rep = NULL;
+       gchar *dirs_path = NULL;
+       gchar path_sep[2] = { GIT_PATH_LIST_SEPARATOR, 0 };
 
        g_return_val_if_fail (G_IS_FILE (location), NULL);
        g_return_val_if_fail (error == NULL || *error == NULL, NULL);
 
        path = g_file_get_path (location);
-
        g_return_val_if_fail (path != NULL, NULL);
 
+       if (ceiling_dirs != NULL) {
+               dirs_path = g_strjoinv (path_sep, (gchar **)ceiling_dirs);
+       }
+
        ret = git_repository_discover (&buf,
                                       path,
-                                      0,
-                                      "");
+                                      across_fs ? 1 : 0,
+                                      dirs_path);
 
        g_free (path);
+       g_free (dirs_path);
 
        if (ret == GIT_OK)
        {
diff --git a/libgit2-glib/ggit-repository.h b/libgit2-glib/ggit-repository.h
index 0254a45..9cdb09c 100644
--- a/libgit2-glib/ggit-repository.h
+++ b/libgit2-glib/ggit-repository.h
@@ -272,6 +272,11 @@ gboolean            ggit_repository_set_head          (GgitRepository        *re
 GFile              *ggit_repository_discover          (GFile                 *location,
                                                        GError               **error);
 
+GFile              *ggit_repository_discover_full     (GFile        *location,
+                                                       gboolean      across_fs,
+                                                       const gchar **ceiling_dirs,
+                                                       GError      **error);
+
 gboolean            ggit_repository_is_head_detached  (GgitRepository        *repository,
                                                        GError               **error);