Move refdb_backend to include/git2/sys

This moves most of the refdb stuff over to the include/git2/sys
directory, with some minor shifts in function organization.

While I was making the necessary updates, I also removed the
trailing whitespace in a few files that I modified just because I
was there and it was bugging me.

include/git2/refdb.h

@@ -81,20 +81,6 @@ GIT_EXTERN(int) git_refdb_compress(git_refdb *refdb);
  */
 GIT_EXTERN(void) git_refdb_free(git_refdb *refdb);
 
-/**
- * Sets the custom backend to an existing reference DB
- *
- * Read <refdb_backends.h> for more information.
- *
- * @param refdb database to add the backend to
- * @param backend pointer to a git_refdb_backend instance
- * @param priority Value for ordering the backends queue
- * @return 0 on success; error code otherwise
- */
-GIT_EXTERN(int) git_refdb_set_backend(
-	git_refdb *refdb,
-	git_refdb_backend *backend);
-
 /** @} */
 GIT_END_DECL
 

include/git2/refdb_backend.h → include/git2/sys/refdb_backend.h

@@ -7,9 +7,9 @@
 #ifndef INCLUDE_git_refdb_backend_h__
 #define INCLUDE_git_refdb_backend_h__
 
-#include "common.h"
-#include "types.h"
-#include "oid.h"
+#include "git2/common.h"
+#include "git2/types.h"
+#include "git2/oid.h"
 
 /**
  * @file git2/refdb_backend.h
@@ -103,6 +103,18 @@ GIT_EXTERN(int) git_refdb_backend_fs(
 	struct git_refdb_backend **backend_out,
 	git_repository *repo);
 
+/**
+ * Sets the custom backend to an existing reference DB
+ *
+ * @param refdb database to add the backend to
+ * @param backend pointer to a git_refdb_backend instance
+ * @param priority Value for ordering the backends queue
+ * @return 0 on success; error code otherwise
+ */
+GIT_EXTERN(int) git_refdb_set_backend(
+	git_refdb *refdb,
+	git_refdb_backend *backend);
+
 GIT_END_DECL
 
 #endif

src/refdb.c

@@ -7,15 +7,16 @@
 
 #include "common.h"
 #include "posix.h"
+
 #include "git2/object.h"
 #include "git2/refs.h"
 #include "git2/refdb.h"
+#include "git2/sys/refdb_backend.h"
+
 #include "hash.h"
 #include "refdb.h"
 #include "refs.h"
 
-#include "git2/refdb_backend.h"
-
 int git_refdb_new(git_refdb **out, git_repository *repo)
 {
 	git_refdb *db;

src/refdb_fs.c

@@ -18,7 +18,7 @@
 #include <git2/tag.h>
 #include <git2/object.h>
 #include <git2/refdb.h>
-#include <git2/refdb_backend.h>
+#include <git2/sys/refdb_backend.h>
 
 GIT__USE_STRMAP;
 

src/refs.c

@@ -19,7 +19,6 @@
 #include <git2/branch.h>
 #include <git2/refs.h>
 #include <git2/refdb.h>
-#include <git2/refdb_backend.h>
 
 GIT__USE_STRMAP;
 

src/util.h

@@ -7,6 +7,8 @@
 #ifndef INCLUDE_util_h__
 #define INCLUDE_util_h__
 
+#include "common.h"
+
 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
 #define bitsizeof(x) (CHAR_BIT * sizeof(x))
 #define MSB(x, bits) ((x) & (~0ULL << (bitsizeof(x) - (bits))))

tests-clar/refdb/inmemory.c

 #include "clar_libgit2.h"
-#include "refdb.h"
-#include "repository.h"
+
+#include "buffer.h"
+#include "posix.h"
+#include "path.h"
+#include "refs.h"
+
 #include "testdb.h"
 
 #define TEST_REPO_PATH "testrepo"
 
 static git_repository *repo;
-static git_refdb_backend *refdb_backend;
 
 int unlink_ref(void *payload, git_buf *file)
 {
@@ -51,15 +54,16 @@ int ref_file_foreach(git_repository *repo, int (* cb)(void *payload, git_buf *fi
 
 void test_refdb_inmemory__initialize(void)
 {
-	git_refdb *refdb;
-
 	git_buf repo_refs_dir = GIT_BUF_INIT;
+	git_refdb *refdb;
+	git_refdb_backend *refdb_backend;
 
 	repo = cl_git_sandbox_init(TEST_REPO_PATH);
 
 	cl_git_pass(git_repository_refdb(&refdb, repo));
 	cl_git_pass(refdb_backend_test(&refdb_backend, repo));
 	cl_git_pass(git_refdb_set_backend(refdb, refdb_backend));
+	git_refdb_free(refdb);
 
 	ref_file_foreach(repo, unlink_ref);
 

tests-clar/refdb/testdb.c

-#include "common.h"
 #include "vector.h"
 #include "util.h"
-#include <git2/refdb.h>
-#include <git2/refdb_backend.h>
-#include <git2/errors.h>
-#include <git2/repository.h>
+#include "testdb.h"
 
 typedef struct refdb_test_backend {
 	git_refdb_backend parent;

tests-clar/refdb/testdb.h

+#include <git2/errors.h>
+#include <git2/repository.h>
+#include <git2/refdb.h>
+#include <git2/sys/refdb_backend.h>
+
 int refdb_backend_test(
 	git_refdb_backend **backend_out,
 	git_repository *repo);