thodg/libgit2

diff --git a/include/git2/repository.h b/include/git2/repository.h
index bb2b3db..4fbd913 100644
--- a/include/git2/repository.h
+++ b/include/git2/repository.h
@@ -657,6 +657,15 @@ GIT_EXTERN(int) git_repository_set_namespace(git_repository *repo, const char *n
  */
 GIT_EXTERN(const char *) git_repository_get_namespace(git_repository *repo);
 
+
+/**
+ * Determine if the repository was a shallow clone
+ *
+ * @param repo The repository
+ * @return 1 if shallow, zero if not
+ */
+GIT_EXTERN(int) git_repository_is_shallow(git_repository *repo);
+
 /** @} */
 GIT_END_DECL
 #endif
diff --git a/src/repository.c b/src/repository.c
index 9957f32..28505e8 100644
--- a/src/repository.c
+++ b/src/repository.c
@@ -1822,3 +1822,20 @@ int git_repository_state(git_repository *repo)
 	git_buf_free(&repo_path);
 	return state;
 }
+
+int git_repository_is_shallow(git_repository *repo)
+{
+	git_buf path = GIT_BUF_INIT;
+	struct stat st;
+	int error;
+
+	git_buf_joinpath(&path, repo->path_repository, "shallow");
+	error = git_path_lstat(path.ptr, &st);
+	git_buf_free(&path);
+
+	if (error == GIT_ENOTFOUND)
+		return 0;
+	if (error < 0)
+		return -1;
+	return st.st_size == 0 ? 0 : 1;
+}
diff --git a/tests-clar/repo/shallow.c b/tests-clar/repo/shallow.c
new file mode 100644
index 0000000..1cc66ae
--- /dev/null
+++ b/tests-clar/repo/shallow.c
@@ -0,0 +1,33 @@
+#include "clar_libgit2.h"
+#include "fileops.h"
+
+static git_repository *g_repo;
+
+void test_repo_shallow__initialize(void)
+{
+}
+
+void test_repo_shallow__cleanup(void)
+{
+	cl_git_sandbox_cleanup();
+}
+
+void test_repo_shallow__no_shallow_file(void)
+{
+	g_repo = cl_git_sandbox_init("testrepo.git");
+	cl_assert_equal_i(0, git_repository_is_shallow(g_repo));
+}
+
+void test_repo_shallow__empty_shallow_file(void)
+{
+	g_repo = cl_git_sandbox_init("testrepo.git");
+	cl_git_mkfile("testrepo.git/shallow", "");
+	cl_assert_equal_i(0, git_repository_is_shallow(g_repo));
+}
+
+void test_repo_shallow__shallow_repo(void)
+{
+	g_repo = cl_git_sandbox_init("shallow.git");
+	cl_assert_equal_i(1, git_repository_is_shallow(g_repo));
+}
+
diff --git a/tests-clar/resources/shallow.git/HEAD b/tests-clar/resources/shallow.git/HEAD
new file mode 100644
index 0000000..cb089cd
--- /dev/null
+++ b/tests-clar/resources/shallow.git/HEAD
@@ -0,0 +1 @@
+ref: refs/heads/master
diff --git a/tests-clar/resources/shallow.git/config b/tests-clar/resources/shallow.git/config
new file mode 100644
index 0000000..a88b74b
--- /dev/null
+++ b/tests-clar/resources/shallow.git/config
@@ -0,0 +1,8 @@
+[core]
+	repositoryformatversion = 0
+	filemode = true
+	bare = true
+	ignorecase = true
+	precomposeunicode = false
+[remote "origin"]
+	url = file://testrepo.git
diff --git a/tests-clar/resources/shallow.git/objects/pack/pack-706e49b161700946489570d96153e5be4dc31ad4.idx b/tests-clar/resources/shallow.git/objects/pack/pack-706e49b161700946489570d96153e5be4dc31ad4.idx
new file mode 100644
index 0000000..bfc7d24
Binary files /dev/null and b/tests-clar/resources/shallow.git/objects/pack/pack-706e49b161700946489570d96153e5be4dc31ad4.idx differ
diff --git a/tests-clar/resources/shallow.git/objects/pack/pack-706e49b161700946489570d96153e5be4dc31ad4.pack b/tests-clar/resources/shallow.git/objects/pack/pack-706e49b161700946489570d96153e5be4dc31ad4.pack
new file mode 100644
index 0000000..ccc6932
Binary files /dev/null and b/tests-clar/resources/shallow.git/objects/pack/pack-706e49b161700946489570d96153e5be4dc31ad4.pack differ
diff --git a/tests-clar/resources/shallow.git/packed-refs b/tests-clar/resources/shallow.git/packed-refs
new file mode 100644
index 0000000..97eed74
--- /dev/null
+++ b/tests-clar/resources/shallow.git/packed-refs
@@ -0,0 +1,2 @@
+# pack-refs with: peeled 
+a65fedf39aefe402d3bb6e24df4d4f5fe4547750 refs/heads/master
diff --git a/tests-clar/resources/shallow.git/refs/.gitkeep b/tests-clar/resources/shallow.git/refs/.gitkeep
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tests-clar/resources/shallow.git/refs/.gitkeep
diff --git a/tests-clar/resources/shallow.git/shallow b/tests-clar/resources/shallow.git/shallow
new file mode 100644
index 0000000..9536ad8
--- /dev/null
+++ b/tests-clar/resources/shallow.git/shallow
@@ -0,0 +1 @@
+be3563ae3f795b2b4353bcce3a527ad0a4f7f644