thodg/libgit2

diff --git a/src/config.h b/src/config.h
index 7749a9c..43574a5 100644
--- a/src/config.h
+++ b/src/config.h
@@ -14,6 +14,7 @@
 
 #define GIT_CONFIG_FILENAME ".gitconfig"
 #define GIT_CONFIG_FILENAME_INREPO "config"
+#define GIT_CONFIG_FILE_MODE 0666
 
 struct git_config {
 	git_vector files;
diff --git a/src/config_file.c b/src/config_file.c
index a85ae15..855574d 100644
--- a/src/config_file.c
+++ b/src/config_file.c
@@ -1034,7 +1034,7 @@ static int config_write(diskfile_backend *cfg, cvar_t *var)
 	if (error < GIT_SUCCESS)
 		git_filebuf_cleanup(&file);
 	else
-		error = git_filebuf_commit(&file);
+		error = git_filebuf_commit(&file, GIT_CONFIG_FILE_MODE);
 
 	git_futils_freebuffer(&cfg->reader.buffer);
 	return error;
diff --git a/src/fetch.c b/src/fetch.c
index ac72828..af7dbaf 100644
--- a/src/fetch.c
+++ b/src/fetch.c
@@ -14,6 +14,7 @@
 #include "transport.h"
 #include "remote.h"
 #include "refspec.h"
+#include "pack.h"
 #include "fetch.h"
 #include "netops.h"
 
@@ -181,7 +182,7 @@ int git_fetch__download_pack(char **out, const char *buffered, size_t buffered_s
 	}
 
 	/* A bit dodgy, but we need to keep the pack at the temporary path */
-	error = git_filebuf_commit_at(&file, file.path_lock);
+	error = git_filebuf_commit_at(&file, file.path_lock, GIT_PACK_FILE_MODE);
 cleanup:
 	if (error < GIT_SUCCESS)
 		git_filebuf_cleanup(&file);
diff --git a/src/filebuf.c b/src/filebuf.c
index e6167d0..a86d25b 100644
--- a/src/filebuf.c
+++ b/src/filebuf.c
@@ -10,6 +10,8 @@
 #include "filebuf.h"
 #include "fileops.h"
 
+#define GIT_LOCK_FILE_MODE 0644
+
 static const size_t WRITE_BUFFER_SIZE = (4096 * 2);
 
 static int lock_file(git_filebuf *file, int flags)
@@ -24,9 +26,9 @@ static int lock_file(git_filebuf *file, int flags)
 	/* create path to the file buffer is required */
 	if (flags & GIT_FILEBUF_FORCE) {
 		/* XXX: Should dirmode here be configurable? Or is 0777 always fine? */
-		file->fd = git_futils_creat_locked_withpath(file->path_lock, 0777, 0644);
+		file->fd = git_futils_creat_locked_withpath(file->path_lock, 0777, GIT_LOCK_FILE_MODE);
 	} else {
-		file->fd = git_futils_creat_locked(file->path_lock, 0644);
+		file->fd = git_futils_creat_locked(file->path_lock, GIT_LOCK_FILE_MODE);
 	}
 
 	if (file->fd < 0)
@@ -247,17 +249,17 @@ int git_filebuf_hash(git_oid *oid, git_filebuf *file)
 	return GIT_SUCCESS;
 }
 
-int git_filebuf_commit_at(git_filebuf *file, const char *path)
+int git_filebuf_commit_at(git_filebuf *file, const char *path, mode_t mode)
 {
 	free(file->path_original);
 	file->path_original = git__strdup(path);
 	if (file->path_original == NULL)
 		return GIT_ENOMEM;
 
-	return git_filebuf_commit(file);
+	return git_filebuf_commit(file, mode);
 }
 
-int git_filebuf_commit(git_filebuf *file)
+int git_filebuf_commit(git_filebuf *file, mode_t mode)
 {
 	int error;
 
@@ -271,6 +273,11 @@ int git_filebuf_commit(git_filebuf *file)
 	p_close(file->fd);
 	file->fd = -1;
 
+	if (p_chmod(file->path_lock, mode)) {
+		error = git__throw(GIT_EOSERR, "Failed to chmod locked file before committing");
+		goto cleanup;
+	}
+
 	error = git_futils_mv_atomic(file->path_lock, file->path_original);
 
 cleanup:
diff --git a/src/filebuf.h b/src/filebuf.h
index 525ca3c..d08505e 100644
--- a/src/filebuf.h
+++ b/src/filebuf.h
@@ -49,8 +49,8 @@ int git_filebuf_reserve(git_filebuf *file, void **buff, size_t len);
 int git_filebuf_printf(git_filebuf *file, const char *format, ...) GIT_FORMAT_PRINTF(2, 3);
 
 int git_filebuf_open(git_filebuf *lock, const char *path, int flags);
-int git_filebuf_commit(git_filebuf *lock);
-int git_filebuf_commit_at(git_filebuf *lock, const char *path);
+int git_filebuf_commit(git_filebuf *lock, mode_t mode);
+int git_filebuf_commit_at(git_filebuf *lock, const char *path, mode_t mode);
 void git_filebuf_cleanup(git_filebuf *lock);
 int git_filebuf_hash(git_oid *oid, git_filebuf *file);
 
diff --git a/src/index.c b/src/index.c
index 7bf5daf..2655aef 100644
--- a/src/index.c
+++ b/src/index.c
@@ -262,7 +262,7 @@ int git_index_write(git_index *index)
 		return git__rethrow(error, "Failed to write index");
 	}
 
-	if ((error = git_filebuf_commit(&file)) < GIT_SUCCESS)
+	if ((error = git_filebuf_commit(&file, GIT_INDEX_FILE_MODE)) < GIT_SUCCESS)
 		return git__rethrow(error, "Failed to write index");
 
 	if (p_stat(index->index_file_path, &indexst) == 0) {
diff --git a/src/index.h b/src/index.h
index e912770..a1cd340 100644
--- a/src/index.h
+++ b/src/index.h
@@ -14,6 +14,9 @@
 #include "git2/odb.h"
 #include "git2/index.h"
 
+#define GIT_INDEX_FILE "index"
+#define GIT_INDEX_FILE_MODE 0666
+
 struct git_index {
 	git_repository *repository;
 	char *index_file_path;
diff --git a/src/indexer.c b/src/indexer.c
index d5f605f..6be4f4a 100644
--- a/src/indexer.c
+++ b/src/indexer.c
@@ -272,7 +272,7 @@ int git_indexer_write(git_indexer *idx)
 	/* Figure out what the final name should be */
 	index_path(filename, idx);
 	/* Commit file */
-	error = git_filebuf_commit_at(&idx->file, filename);
+	error = git_filebuf_commit_at(&idx->file, filename, GIT_PACK_FILE_MODE);
 
 cleanup:
 	git_mwindow_free_all(&idx->pack->mwf);
diff --git a/src/odb.h b/src/odb.h
index 7c8c9f9..833739e 100644
--- a/src/odb.h
+++ b/src/odb.h
@@ -16,6 +16,7 @@
 
 #define GIT_OBJECTS_DIR "objects/"
 #define GIT_OBJECT_DIR_MODE 0777
+#define GIT_OBJECT_FILE_MODE 0444
 
 /* DO NOT EXPORT */
 typedef struct {
diff --git a/src/odb_loose.c b/src/odb_loose.c
index a3013d3..dc98972 100644
--- a/src/odb_loose.c
+++ b/src/odb_loose.c
@@ -670,7 +670,7 @@ static int loose_backend__stream_fwrite(git_oid *oid, git_odb_stream *_stream)
 		return git__rethrow(error, "Failed to write loose backend");
 
 	stream->finished = 1;
-	return git_filebuf_commit_at(&stream->fbuf, final_path);
+	return git_filebuf_commit_at(&stream->fbuf, final_path, GIT_OBJECT_FILE_MODE);
 }
 
 static int loose_backend__stream_write(git_odb_stream *_stream, const char *data, size_t len)
@@ -790,7 +790,7 @@ static int loose_backend__write(git_oid *oid, git_odb_backend *_backend, const v
 	if ((error = git_futils_mkpath2file(final_path, GIT_OBJECT_DIR_MODE)) < GIT_SUCCESS)
 		goto cleanup;
 
-	return git_filebuf_commit_at(&fbuf, final_path);
+	return git_filebuf_commit_at(&fbuf, final_path, GIT_OBJECT_FILE_MODE);
 
 cleanup:
 	git_filebuf_cleanup(&fbuf);
diff --git a/src/pack.h b/src/pack.h
index 0fddd9d..aecf580 100644
--- a/src/pack.h
+++ b/src/pack.h
@@ -15,6 +15,8 @@
 #include "mwindow.h"
 #include "odb.h"
 
+#define GIT_PACK_FILE_MODE 0444
+
 #define PACK_SIGNATURE 0x5041434b	/* "PACK" */
 #define PACK_VERSION 2
 #define pack_version_ok(v) ((v) == htonl(2) || (v) == htonl(3))
diff --git a/src/reflog.c b/src/reflog.c
index 6cdb353..303c2b4 100644
--- a/src/reflog.c
+++ b/src/reflog.c
@@ -71,7 +71,7 @@ static int reflog_write(const char *log_path, const char *oid_old,
 	}
 
 	git_filebuf_write(&fbuf, log.ptr, log.size);
-	error = git_filebuf_commit(&fbuf);
+	error = git_filebuf_commit(&fbuf, GIT_REFLOG_FILE_MODE);
 
 	git_buf_free(&log);
 	return error == GIT_SUCCESS ? GIT_SUCCESS : git__rethrow(error, "Failed to write reflog");
diff --git a/src/reflog.h b/src/reflog.h
index 16e9a94..44b0637 100644
--- a/src/reflog.h
+++ b/src/reflog.h
@@ -13,6 +13,7 @@
 
 #define GIT_REFLOG_DIR "logs/"
 #define GIT_REFLOG_DIR_MODE 0777
+#define GIT_REFLOG_FILE_MODE 0666
 
 #define GIT_REFLOG_SIZE_MIN (2*GIT_OID_HEXSZ+2+17)
 
diff --git a/src/refs.c b/src/refs.c
index fcf771b..b34067f 100644
--- a/src/refs.c
+++ b/src/refs.c
@@ -9,6 +9,7 @@
 #include "hash.h"
 #include "repository.h"
 #include "fileops.h"
+#include "pack.h"
 
 #include <git2/tag.h>
 #include <git2/object.h>
@@ -357,7 +358,7 @@ static int loose_write(git_reference *ref)
 		goto unlock;
 	}
 
-	error = git_filebuf_commit(&file);
+	error = git_filebuf_commit(&file, GIT_REFS_FILE_MODE);
 
 	if (p_stat(ref_path, &st) == GIT_SUCCESS)
 		ref->mtime = st.st_mtime;
@@ -870,7 +871,7 @@ cleanup:
 	/* if we've written all the references properly, we can commit
 	 * the packfile to make the changes effective */
 	if (error == GIT_SUCCESS) {
-		error = git_filebuf_commit(&pack_file);
+		error = git_filebuf_commit(&pack_file, GIT_PACK_FILE_MODE);
 
 		/* when and only when the packfile has been properly written,
 		 * we can go ahead and remove the loose refs */
diff --git a/src/refs.h b/src/refs.h
index f802cfe..33c1e69 100644
--- a/src/refs.h
+++ b/src/refs.h
@@ -17,6 +17,7 @@
 #define GIT_REFS_TAGS_DIR GIT_REFS_DIR "tags/"
 #define GIT_REFS_REMOTES_DIR GIT_REFS_DIR "remotes/"
 #define GIT_REFS_DIR_MODE 0777
+#define GIT_REFS_FILE_MODE 0666
 
 #define GIT_RENAMED_REF_FILE GIT_REFS_DIR "RENAMED-REF"
 
diff --git a/src/repository.h b/src/repository.h
index a12dd9d..0c17958 100644
--- a/src/repository.h
+++ b/src/repository.h
@@ -24,7 +24,6 @@
 #define GIT_DIR DOT_GIT "/"
 #define GIT_DIR_MODE 0755
 #define GIT_BARE_DIR_MODE 0777
-#define GIT_INDEX_FILE "index"
 
 struct git_object {
 	git_cached_obj cached;
diff --git a/src/transports/http.c b/src/transports/http.c
index 680354b..c324bb4 100644
--- a/src/transports/http.c
+++ b/src/transports/http.c
@@ -15,6 +15,7 @@
 #include "buffer.h"
 #include "pkt.h"
 #include "refs.h"
+#include "pack.h"
 #include "fetch.h"
 #include "filebuf.h"
 #include "repository.h"
@@ -702,7 +703,7 @@ static int http_download_pack(char **out, git_transport *transport, git_reposito
 	}
 
 	/* A bit dodgy, but we need to keep the pack at the temporary path */
-	error = git_filebuf_commit_at(&file, file.path_lock);
+	error = git_filebuf_commit_at(&file, file.path_lock, GIT_PACK_FILE_MODE);
 
 cleanup:
 	if (error < GIT_SUCCESS)
diff --git a/tests-clay/core/dirent.c b/tests-clay/core/dirent.c
index 898b122..105e8d8 100644
--- a/tests-clay/core/dirent.c
+++ b/tests-clay/core/dirent.c
@@ -31,7 +31,7 @@ static void setup(walk_data *d)
 	state_loc = d;
 
 	for (n = d->names; n->name; n++) {
-		git_file fd = p_creat(n->name, 0600);
+		git_file fd = p_creat(n->name, 0666);
 		cl_assert(fd >= 0);
 		p_close(fd);
 		n->count = 0;
diff --git a/tests-clay/core/filebuf.c b/tests-clay/core/filebuf.c
index e00e204..e1ecb27 100644
--- a/tests-clay/core/filebuf.c
+++ b/tests-clay/core/filebuf.c
@@ -27,14 +27,14 @@ void test_core_filebuf__1(void)
 	int fd;
 	char test[] = "test";
 
-	fd = p_creat(test, 0644);
+	fd = p_creat(test, 0666);
 	cl_must_pass(fd);
 	cl_must_pass(p_write(fd, "libgit2 rocks\n", 14));
 	cl_must_pass(p_close(fd));
 
 	cl_git_pass(git_filebuf_open(&file, test, GIT_FILEBUF_APPEND));
 	cl_git_pass(git_filebuf_printf(&file, "%s\n", "libgit2 rocks"));
-	cl_git_pass(git_filebuf_commit(&file));
+	cl_git_pass(git_filebuf_commit(&file, 0666));
 
 	cl_must_pass(p_unlink(test));
 }
@@ -51,7 +51,7 @@ void test_core_filebuf__2(void)
 
 	cl_git_pass(git_filebuf_open(&file, test, 0));
 	cl_git_pass(git_filebuf_write(&file, buf, sizeof(buf)));
-	cl_git_pass(git_filebuf_commit(&file));
+	cl_git_pass(git_filebuf_commit(&file, 0666));
 
 	cl_must_pass(p_unlink(test));
 }
diff --git a/tests-clay/core/rmdir.c b/tests-clay/core/rmdir.c
index 03baecf..20cc8f5 100644
--- a/tests-clay/core/rmdir.c
+++ b/tests-clay/core/rmdir.c
@@ -39,7 +39,7 @@ void test_core_rmdir__fail_to_delete_non_empty_dir(void)
 
 	git_path_join(file, empty_tmp_dir, "/two/file.txt");
 
-	fd = p_creat(file, 0755);
+	fd = p_creat(file, 0666);
 	cl_assert(fd >= 0);
 
 	cl_must_pass(p_close(fd));
diff --git a/tests-clay/status/single.c b/tests-clay/status/single.c
index ea1c77f..4fd6e6f 100644
--- a/tests-clay/status/single.c
+++ b/tests-clay/status/single.c
@@ -10,7 +10,7 @@ cleanup__remove_file(void *_file)
 static void
 file_create(const char *filename, const char *content)
 {
-	int fd = p_creat(filename, 0644);
+	int fd = p_creat(filename, 0666);
 	cl_assert(fd >= 0);
 	cl_must_pass(p_write(fd, content, strlen(content)));
 	cl_must_pass(p_close(fd));
diff --git a/tests/t00-core.c b/tests/t00-core.c
index 1856815..dbc8067 100644
--- a/tests/t00-core.c
+++ b/tests/t00-core.c
@@ -264,7 +264,7 @@ static int setup(walk_data *d)
 	state_loc = d;
 
 	for (n = d->names; n->name; n++) {
-		git_file fd = p_creat(n->name, 0600);
+		git_file fd = p_creat(n->name, 0666);
 		if (fd < 0)
 			return GIT_ERROR;
 		p_close(fd);
@@ -479,14 +479,14 @@ BEGIN_TEST(filebuf1, "make sure GIT_FILEBUF_APPEND works as expected")
 	int fd;
 	char test[] = "test";
 
-	fd = p_creat(test, 0644);
+	fd = p_creat(test, 0666);
 	must_pass(fd);
 	must_pass(p_write(fd, "libgit2 rocks\n", 14));
 	must_pass(p_close(fd));
 
 	must_pass(git_filebuf_open(&file, test, GIT_FILEBUF_APPEND));
 	must_pass(git_filebuf_printf(&file, "%s\n", "libgit2 rocks"));
-	must_pass(git_filebuf_commit(&file));
+	must_pass(git_filebuf_commit(&file, 0666));
 
 	must_pass(p_unlink(test));
 END_TEST
@@ -499,7 +499,7 @@ BEGIN_TEST(filebuf2, "make sure git_filebuf_write writes large buffer correctly"
 	memset(buf, 0xfe, sizeof(buf));
 	must_pass(git_filebuf_open(&file, test, 0));
 	must_pass(git_filebuf_write(&file, buf, sizeof(buf)));
-	must_pass(git_filebuf_commit(&file));
+	must_pass(git_filebuf_commit(&file, 0666));
 
 	must_pass(p_unlink(test));
 END_TEST
diff --git a/tests/t04-commit.c b/tests/t04-commit.c
index 3fb4d37..4abbf01 100644
--- a/tests/t04-commit.c
+++ b/tests/t04-commit.c
@@ -690,6 +690,10 @@ BEGIN_TEST(write0, "write a new commit object from memory to disk")
 
 	must_be_true(strcmp(git_commit_message(commit), COMMIT_MESSAGE) == 0);
 
+#ifndef GIT_WIN32
+	must_be_true((loose_object_mode(REPOSITORY_FOLDER, (git_object *)commit) & 0777) == GIT_OBJECT_FILE_MODE);
+#endif
+
 	must_pass(remove_loose_object(REPOSITORY_FOLDER, (git_object *)commit));
 
 	git_commit_close(commit);
diff --git a/tests/t06-index.c b/tests/t06-index.c
index dde98ab..44562d0 100644
--- a/tests/t06-index.c
+++ b/tests/t06-index.c
@@ -179,7 +179,7 @@ BEGIN_TEST(add0, "add a new file to the index")
 	must_pass(git_futils_mkpath2file(TEMP_REPO_FOLDER "myrepo/test.txt", 0777));
 	must_pass(git_filebuf_open(&file, TEMP_REPO_FOLDER "myrepo/test.txt", 0));
 	must_pass(git_filebuf_write(&file, "hey there\n", 10));
-	must_pass(git_filebuf_commit(&file));
+	must_pass(git_filebuf_commit(&file, 0666));
 
 	/* Store the expected hash of the file/blob
 	 * This has been generated by executing the following
diff --git a/tests/t08-tag.c b/tests/t08-tag.c
index 216fb9d..85ef922 100644
--- a/tests/t08-tag.c
+++ b/tests/t08-tag.c
@@ -189,6 +189,9 @@ BEGIN_TEST(write0, "write a tag to the repository and read it again")
 	must_pass(git_reference_lookup(&ref_tag, repo, "refs/tags/the-tag"));
 	must_be_true(git_oid_cmp(git_reference_oid(ref_tag), &tag_id) == 0);
 	must_pass(git_reference_delete(ref_tag));
+#ifndef GIT_WIN32
+	must_be_true((loose_object_mode(REPOSITORY_FOLDER, (git_object *)tag) & 0777) == GIT_OBJECT_FILE_MODE);
+#endif
 
 	must_pass(remove_loose_object(REPOSITORY_FOLDER, (git_object *)tag));
 
diff --git a/tests/t09-tree.c b/tests/t09-tree.c
index 1f2fe3f..2341a1c 100644
--- a/tests/t09-tree.c
+++ b/tests/t09-tree.c
@@ -202,6 +202,7 @@ BEGIN_TEST(write3, "write a hierarchical tree from a memory")
 	must_be_true(2 == git_tree_entrycount(tree));
 #ifndef GIT_WIN32
 	must_be_true((loose_object_dir_mode(TEMP_REPO_FOLDER, (git_object *)tree) & 0777) == GIT_OBJECT_DIR_MODE);
+	must_be_true((loose_object_mode(TEMP_REPO_FOLDER, (git_object *)tree) & 0777) == GIT_OBJECT_FILE_MODE);
 #endif
 	git_tree_close(tree);
 
diff --git a/tests/t12-repo.c b/tests/t12-repo.c
index c07150c..6197cdd 100644
--- a/tests/t12-repo.c
+++ b/tests/t12-repo.c
@@ -351,7 +351,7 @@ static int write_file(const char *path, const char *content)
 			return error;
 	}
 
-	file = git_futils_creat_withpath(path, 0777, 0644);
+	file = git_futils_creat_withpath(path, 0777, 0666);
 	if (file < GIT_SUCCESS)
 		return file;
 
diff --git a/tests/t15-config.c b/tests/t15-config.c
index c4cb590..a97f820 100644
--- a/tests/t15-config.c
+++ b/tests/t15-config.c
@@ -319,7 +319,7 @@ BEGIN_TEST(config16, "add a variable in a new section")
 	/* As the section wasn't removed, owerwrite the file */
 	must_pass(git_filebuf_open(&buf, CONFIG_BASE "/config10", 0));
 	must_pass(git_filebuf_write(&buf, "[empty]\n", strlen("[empty]\n")));
-	must_pass(git_filebuf_commit(&buf));
+	must_pass(git_filebuf_commit(&buf, 0666));
 END_TEST
 
 BEGIN_TEST(config17, "prefixes aren't broken")
diff --git a/tests/t18-status.c b/tests/t18-status.c
index bd205a4..d836fb9 100644
--- a/tests/t18-status.c
+++ b/tests/t18-status.c
@@ -37,7 +37,7 @@ static int file_create(const char *filename, const char *content)
 {
 	int fd;
 
-	fd = p_creat(filename, 0644);
+	fd = p_creat(filename, 0666);
 	if (fd == 0)
 		return GIT_ERROR;
 	if (p_write(fd, content, strlen(content)) != 0)
@@ -400,7 +400,7 @@ BEGIN_TEST(singlestatus3, "test retrieving status for a new file in an empty rep
 	must_pass(remove_placeholders(TEST_STD_REPO_FOLDER, "dummy-marker.txt"));
 
 	git_path_join(file_path, TEMP_REPO_FOLDER, filename);
-	fd = p_creat(file_path, 0644);
+	fd = p_creat(file_path, 0666);
 	must_pass(fd);
 	must_pass(p_write(fd, "new_file\n", 9));
 	must_pass(p_close(fd));
diff --git a/tests/test_helpers.c b/tests/test_helpers.c
index 7074e48..7bba2e1 100644
--- a/tests/test_helpers.c
+++ b/tests/test_helpers.c
@@ -110,6 +110,18 @@ void locate_loose_object(const char *repository_folder, git_object *object, char
 		*out_folder = top_folder;
 }
 
+int loose_object_mode(const char *repository_folder, git_object *object)
+{
+	char *object_path;
+	struct stat st;
+
+	locate_loose_object(repository_folder, object, &object_path, NULL);
+	assert(p_stat(object_path, &st) == 0);
+	free(object_path);
+
+	return st.st_mode;
+}
+
 int loose_object_dir_mode(const char *repository_folder, git_object *object)
 {
 	char *object_path;
@@ -175,7 +187,7 @@ int copy_file(const char *src, const char *dst)
 	if (git_futils_readbuffer(&source_buf, src) < GIT_SUCCESS)
 		return GIT_ENOTFOUND;
 
-	dst_fd = git_futils_creat_withpath(dst, 0777, 0644);
+	dst_fd = git_futils_creat_withpath(dst, 0777, 0666);
 	if (dst_fd < 0)
 		goto cleanup;
 
diff --git a/tests/test_helpers.h b/tests/test_helpers.h
index 2e5194d..16a3a2c 100644
--- a/tests/test_helpers.h
+++ b/tests/test_helpers.h
@@ -65,6 +65,7 @@ extern int cmp_objects(git_rawobj *o, object_data *d);
 
 extern void locate_loose_object(const char *odb_dir, git_object *object, char **out, char **out_folder);
 
+extern int loose_object_mode(const char *odb_dir, git_object *object);
 extern int loose_object_dir_mode(const char *odb_dir, git_object *object);
 
 extern int remove_loose_object(const char *odb_dir, git_object *object);