index: add sha256 support

examples/show-index.c

@@ -30,7 +30,11 @@ int lg2_show_index(git_repository *repo, int argc, char **argv)
 
 	dirlen = strlen(dir);
 	if (dirlen > 5 && strcmp(dir + dirlen - 5, "index") == 0) {
+#ifdef GIT_EXPERIMENTAL_SHA256
+		check_lg2(git_index_open(&index, dir, GIT_OID_SHA1), "could not open index", dir);
+#else
 		check_lg2(git_index_open(&index, dir), "could not open index", dir);
+#endif
 	} else {
 		check_lg2(git_repository_open_ext(&repo, dir, 0, NULL), "could not open repository", dir);
 		check_lg2(git_repository_index(&index, repo), "could not open repository index", NULL);

include/git2/index.h

@@ -184,7 +184,12 @@ typedef enum {
  * @param index_path the path to the index file in disk
  * @return 0 or an error code
  */
+
+#ifdef GIT_EXPERIMENTAL_SHA256
+GIT_EXTERN(int) git_index_open(git_index **out, const char *index_path, git_oid_t oid_type);
+#else
 GIT_EXTERN(int) git_index_open(git_index **out, const char *index_path);
+#endif
 
 /**
  * Create an in-memory index object.
@@ -197,7 +202,11 @@ GIT_EXTERN(int) git_index_open(git_index **out, const char *index_path);
  * @param out the pointer for the new index
  * @return 0 or an error code
  */
+#ifdef GIT_EXPERIMENTAL_SHA256
+GIT_EXTERN(int) git_index_new(git_index **out, git_oid_t oid_type);
+#else
 GIT_EXTERN(int) git_index_new(git_index **out);
+#endif
 
 /**
  * Free an existing index object.

src/libgit2/apply.c

@@ -19,6 +19,7 @@
 #include "zstream.h"
 #include "reader.h"
 #include "index.h"
+#include "repository.h"
 #include "apply.h"
 
 typedef struct {
@@ -644,7 +645,7 @@ int git_apply_to_tree(
 	 * put the current tree into the postimage as-is - the diff will
 	 * replace any entries contained therein
 	 */
-	if ((error = git_index_new(&postimage)) < 0 ||
+	if ((error = git_index__new(&postimage, repo->oid_type)) < 0 ||
 		(error = git_index_read_tree(postimage, preimage)) < 0 ||
 		(error = git_reader_for_index(&post_reader, repo, postimage)) < 0)
 		goto done;
@@ -851,8 +852,8 @@ int git_apply(
 	 * having the full repo index, so we will limit our checkout
 	 * to only write these files that were affected by the diff.
 	 */
-	if ((error = git_index_new(&preimage)) < 0 ||
-	    (error = git_index_new(&postimage)) < 0 ||
+	if ((error = git_index__new(&preimage, repo->oid_type)) < 0 ||
+	    (error = git_index__new(&postimage, repo->oid_type)) < 0 ||
 	    (error = git_reader_for_index(&post_reader, repo, postimage)) < 0)
 		goto done;
 

src/libgit2/index.c

@@ -32,8 +32,6 @@ static int index_apply_to_wd_diff(git_index *index, int action, const git_strarr
 				  unsigned int flags,
 				  git_index_matched_path_cb cb, void *payload);
 
-#define minimal_entry_size (offsetof(struct entry_short, path))
-
 static const size_t INDEX_HEADER_SIZE = 12;
 
 static const unsigned int INDEX_VERSION_NUMBER_DEFAULT = 2;
@@ -65,7 +63,7 @@ struct entry_time {
 	uint32_t nanoseconds;
 };
 
-struct entry_short {
+struct entry_common {
 	struct entry_time ctime;
 	struct entry_time mtime;
 	uint32_t dev;
@@ -74,25 +72,35 @@ struct entry_short {
 	uint32_t uid;
 	uint32_t gid;
 	uint32_t file_size;
-	unsigned char oid[GIT_OID_SHA1_SIZE];
-	uint16_t flags;
-	char path[1]; /* arbitrary length */
 };
 
-struct entry_long {
-	struct entry_time ctime;
-	struct entry_time mtime;
-	uint32_t dev;
-	uint32_t ino;
-	uint32_t mode;
-	uint32_t uid;
-	uint32_t gid;
-	uint32_t file_size;
-	unsigned char oid[GIT_OID_SHA1_SIZE];
-	uint16_t flags;
-	uint16_t flags_extended;
-	char path[1]; /* arbitrary length */
-};
+#define entry_short(oid_size)                        \
+	struct {                                     \
+		struct entry_common common;          \
+		unsigned char oid[oid_size];         \
+		uint16_t flags;                      \
+		char path[1]; /* arbitrary length */ \
+	}
+
+#define entry_long(oid_size)                         \
+	struct {                                     \
+		struct entry_common common;          \
+		unsigned char oid[oid_size];         \
+		uint16_t flags;                      \
+		uint16_t flags_extended;             \
+		char path[1]; /* arbitrary length */ \
+	}
+
+typedef entry_short(GIT_OID_SHA1_SIZE) index_entry_short_sha1;
+typedef entry_long(GIT_OID_SHA1_SIZE) index_entry_long_sha1;
+
+#ifdef GIT_EXPERIMENTAL_SHA256
+typedef entry_short(GIT_OID_SHA256_SIZE) index_entry_short_sha256;
+typedef entry_long(GIT_OID_SHA256_SIZE) index_entry_long_sha256;
+#endif
+
+#undef entry_short
+#undef entry_long
 
 struct entry_srch_key {
 	const char *path;
@@ -115,12 +123,12 @@ struct reuc_entry_internal {
 bool git_index__enforce_unsaved_safety = false;
 
 /* local declarations */
-static int read_extension(size_t *read_len, git_index *index, const char *buffer, size_t buffer_size);
+static int read_extension(size_t *read_len, git_index *index, size_t checksum_size, const char *buffer, size_t buffer_size);
 static int read_header(struct index_header *dest, const void *buffer);
 
 static int parse_index(git_index *index, const char *buffer, size_t buffer_size);
 static bool is_index_extended(git_index *index);
-static int write_index(unsigned char checksum[GIT_HASH_SHA1_SIZE], size_t *checksum_size, git_index *index, git_filebuf *file);
+static int write_index(unsigned char checksum[GIT_HASH_MAX_SIZE], size_t *checksum_size, git_index *index, git_filebuf *file);
 
 static void index_entry_free(git_index_entry *entry);
 static void index_entry_reuc_free(git_index_reuc_entry *reuc);
@@ -401,7 +409,10 @@ void git_index__set_ignore_case(git_index *index, bool ignore_case)
 	git_vector_sort(&index->reuc);
 }
 
-int git_index_open(git_index **index_out, const char *index_path)
+int git_index__open(
+	git_index **index_out,
+	const char *index_path,
+	git_oid_t oid_type)
 {
 	git_index *index;
 	int error = -1;
@@ -411,6 +422,8 @@ int git_index_open(git_index **index_out, const char *index_path)
 	index = git__calloc(1, sizeof(git_index));
 	GIT_ERROR_CHECK_ALLOC(index);
 
+	index->oid_type = oid_type;
+
 	if (git_pool_init(&index->tree_pool, 1) < 0)
 		goto fail;
 
@@ -451,10 +464,34 @@ fail:
 	return error;
 }
 
+#ifdef GIT_EXPERIMENTAL_SHA256
+int git_index_open(git_index **index_out, const char *index_path, git_oid_t oid_type)
+{
+	return git_index__open(index_out, index_path, oid_type);
+}
+#else
+int git_index_open(git_index **index_out, const char *index_path)
+{
+	return git_index__open(index_out, index_path, GIT_OID_SHA1);
+}
+#endif
+
+int git_index__new(git_index **out, git_oid_t oid_type)
+{
+	return git_index__open(out, NULL, oid_type);
+}
+
+#ifdef GIT_EXPERIMENTAL_SHA256
+int git_index_new(git_index **out, git_oid_t oid_type)
+{
+	return git_index__new(out, oid_type);
+}
+#else
 int git_index_new(git_index **out)
 {
-	return git_index_open(out, NULL);
+	return git_index__new(out, GIT_OID_SHA1);
 }
+#endif
 
 static void index_free(git_index *index)
 {
@@ -620,8 +657,8 @@ static int compare_checksum(git_index *index)
 {
 	int fd;
 	ssize_t bytes_read;
-	unsigned char checksum[GIT_HASH_SHA1_SIZE];
-	size_t checksum_size = GIT_HASH_SHA1_SIZE;
+	unsigned char checksum[GIT_HASH_MAX_SIZE];
+	size_t checksum_size = git_oid_size(index->oid_type);
 
 	if ((fd = p_open(index->index_file_path, O_RDONLY)) < 0)
 		return fd;
@@ -2306,6 +2343,7 @@ static int index_error_invalid(const char *message)
 static int read_reuc(git_index *index, const char *buffer, size_t size)
 {
 	const char *endptr;
+	size_t oid_size = git_oid_size(index->oid_type);
 	size_t len;
 	int i;
 
@@ -2354,16 +2392,16 @@ static int read_reuc(git_index *index, const char *buffer, size_t size)
 		for (i = 0; i < 3; i++) {
 			if (!lost->mode[i])
 				continue;
-			if (size < GIT_OID_SHA1_SIZE) {
+			if (size < oid_size) {
 				index_entry_reuc_free(lost);
 				return index_error_invalid("reading reuc entry oid");
 			}
 
-			if (git_oid__fromraw(&lost->oid[i], (const unsigned char *) buffer, GIT_OID_SHA1) < 0)
+			if (git_oid__fromraw(&lost->oid[i], (const unsigned char *) buffer, index->oid_type) < 0)
 				return -1;
 
-			size -= GIT_OID_SHA1_SIZE;
-			buffer += GIT_OID_SHA1_SIZE;
+			size -= oid_size;
+			buffer += oid_size;
 		}
 
 		/* entry was read successfully - insert into reuc vector */
@@ -2433,73 +2471,157 @@ out_err:
 	return 0;
 }
 
-static size_t index_entry_size(size_t path_len, size_t varint_len, uint32_t flags)
+GIT_INLINE(size_t) index_entry_path_offset(
+	git_oid_t oid_type,
+	uint32_t flags)
 {
+	if (oid_type == GIT_OID_SHA1)
+		return (flags & GIT_INDEX_ENTRY_EXTENDED) ?
+			offsetof(index_entry_long_sha1, path) :
+			offsetof(index_entry_short_sha1, path);
+
+#ifdef GIT_EXPERIMENTAL_SHA256
+	else if (oid_type == GIT_OID_SHA256)
+		return (flags & GIT_INDEX_ENTRY_EXTENDED) ?
+			offsetof(index_entry_long_sha256, path) :
+			offsetof(index_entry_short_sha256, path);
+#endif
+
+	git_error_set(GIT_ERROR_INTERNAL, "invalid oid type");
+	return 0;
+}
+
+GIT_INLINE(size_t) index_entry_flags_offset(git_oid_t oid_type)
+{
+	if (oid_type == GIT_OID_SHA1)
+		return offsetof(index_entry_long_sha1, flags_extended);
+
+#ifdef GIT_EXPERIMENTAL_SHA256
+	else if (oid_type == GIT_OID_SHA256)
+		return offsetof(index_entry_long_sha256, flags_extended);
+#endif
+
+	git_error_set(GIT_ERROR_INTERNAL, "invalid oid type");
+	return 0;
+}
+
+static size_t index_entry_size(
+	size_t path_len,
+	size_t varint_len,
+	git_oid_t oid_type,
+	uint32_t flags)
+{
+	size_t offset, size;
+
+	if (!(offset = index_entry_path_offset(oid_type, flags)))
+		return 0;
+
 	if (varint_len) {
-		if (flags & GIT_INDEX_ENTRY_EXTENDED)
-			return offsetof(struct entry_long, path) + path_len + 1 + varint_len;
-		else
-			return offsetof(struct entry_short, path) + path_len + 1 + varint_len;
+		if (GIT_ADD_SIZET_OVERFLOW(&size, offset, path_len) ||
+		    GIT_ADD_SIZET_OVERFLOW(&size, size, 1) ||
+		    GIT_ADD_SIZET_OVERFLOW(&size, size, varint_len))
+			return 0;
 	} else {
-#define entry_size(type,len) ((offsetof(type, path) + (len) + 8) & ~7)
-		if (flags & GIT_INDEX_ENTRY_EXTENDED)
-			return entry_size(struct entry_long, path_len);
-		else
-			return entry_size(struct entry_short, path_len);
-#undef entry_size
+		if (GIT_ADD_SIZET_OVERFLOW(&size, offset, path_len) ||
+		    GIT_ADD_SIZET_OVERFLOW(&size, size, 8))
+			return 0;
+
+		size &= ~7;
 	}
+
+	return size;
 }
 
 static int read_entry(
 	git_index_entry **out,
 	size_t *out_size,
 	git_index *index,
+	size_t checksum_size,
 	const void *buffer,
 	size_t buffer_size,
 	const char *last)
 {
-	size_t path_length, entry_size;
+	size_t path_length, path_offset, entry_size;
 	const char *path_ptr;
-	struct entry_short source;
+	struct entry_common *source_common;
+	index_entry_short_sha1 source_sha1;
+#ifdef GIT_EXPERIMENTAL_SHA256
+	index_entry_short_sha256 source_sha256;
+#endif
 	git_index_entry entry = {{0}};
 	bool compressed = index->version >= INDEX_VERSION_NUMBER_COMP;
 	char *tmp_path = NULL;
-	size_t checksum_size = GIT_HASH_SHA1_SIZE;
+
+	size_t minimal_entry_size = index_entry_path_offset(index->oid_type, 0);
 
 	if (checksum_size + minimal_entry_size > buffer_size)
 		return -1;
 
 	/* buffer is not guaranteed to be aligned */
-	memcpy(&source, buffer, sizeof(struct entry_short));
+	switch (index->oid_type) {
+	case GIT_OID_SHA1:
+		source_common = &source_sha1.common;
+		memcpy(&source_sha1, buffer, sizeof(source_sha1));
+		break;
+#ifdef GIT_EXPERIMENTAL_SHA256
+	case GIT_OID_SHA256:
+		source_common = &source_sha256.common;
+		memcpy(&source_sha256, buffer, sizeof(source_sha256));
+		break;
+#endif
+	default:
+		GIT_ASSERT(!"invalid oid type");
+	}
 
-	entry.ctime.seconds = (git_time_t)ntohl(source.ctime.seconds);
-	entry.ctime.nanoseconds = ntohl(source.ctime.nanoseconds);
-	entry.mtime.seconds = (git_time_t)ntohl(source.mtime.seconds);
-	entry.mtime.nanoseconds = ntohl(source.mtime.nanoseconds);
-	entry.dev = ntohl(source.dev);
-	entry.ino = ntohl(source.ino);
-	entry.mode = ntohl(source.mode);
-	entry.uid = ntohl(source.uid);
-	entry.gid = ntohl(source.gid);
-	entry.file_size = ntohl(source.file_size);
-	entry.flags = ntohs(source.flags);
+	entry.ctime.seconds = (git_time_t)ntohl(source_common->ctime.seconds);
+	entry.ctime.nanoseconds = ntohl(source_common->ctime.nanoseconds);
+	entry.mtime.seconds = (git_time_t)ntohl(source_common->mtime.seconds);
+	entry.mtime.nanoseconds = ntohl(source_common->mtime.nanoseconds);
+	entry.dev = ntohl(source_common->dev);
+	entry.ino = ntohl(source_common->ino);
+	entry.mode = ntohl(source_common->mode);
+	entry.uid = ntohl(source_common->uid);
+	entry.gid = ntohl(source_common->gid);
+	entry.file_size = ntohl(source_common->file_size);
 
-	if (git_oid__fromraw(&entry.id, source.oid, GIT_OID_SHA1) < 0)
+	switch (index->oid_type) {
+	case GIT_OID_SHA1:
+		if (git_oid__fromraw(&entry.id, source_sha1.oid,
+		                     GIT_OID_SHA1) < 0)
+			return -1;
+		entry.flags = ntohs(source_sha1.flags);
+		break;
+#ifdef GIT_EXPERIMENTAL_SHA256
+	case GIT_OID_SHA256:
+		if (git_oid__fromraw(&entry.id, source_sha256.oid,
+		                     GIT_OID_SHA256) < 0)
+			return -1;
+		entry.flags = ntohs(source_sha256.flags);
+		break;
+#endif
+	default:
+		GIT_ASSERT(!"invalid oid type");
+	}
+
+	if (!(path_offset = index_entry_path_offset(index->oid_type, entry.flags)))
 		return -1;
 
+
 	if (entry.flags & GIT_INDEX_ENTRY_EXTENDED) {
 		uint16_t flags_raw;
 		size_t flags_offset;
 
-		flags_offset = offsetof(struct entry_long, flags_extended);
-		memcpy(&flags_raw, (const char *) buffer + flags_offset,
-			sizeof(flags_raw));
+		if (!(flags_offset = index_entry_flags_offset(index->oid_type)))
+			return -1;
+
+		memcpy(&flags_raw, (const char *)buffer + flags_offset, sizeof(flags_raw));
 		flags_raw = ntohs(flags_raw);
 
 		memcpy(&entry.flags_extended, &flags_raw, sizeof(flags_raw));
-		path_ptr = (const char *) buffer + offsetof(struct entry_long, path);
-	} else
-		path_ptr = (const char *) buffer + offsetof(struct entry_short, path);
+		path_ptr = (const char *)buffer + path_offset;
+	} else {
+		path_ptr = (const char *)buffer + path_offset;
+	}
 
 	if (!compressed) {
 		path_length = entry.flags & GIT_INDEX_ENTRY_NAMEMASK;
@@ -2511,12 +2633,12 @@ static int read_entry(
 
 			path_end = memchr(path_ptr, '\0', buffer_size);
 			if (path_end == NULL)
-				return -1;
+				return index_error_invalid("invalid path name");
 
 			path_length = path_end - path_ptr;
 		}
 
-		entry_size = index_entry_size(path_length, 0, entry.flags);
+		entry_size = index_entry_size(path_length, 0, index->oid_type, entry.flags);
 		entry.path = (char *)path_ptr;
 	} else {
 		size_t varint_len, last_len, prefix_len, suffix_len, path_len;
@@ -2542,15 +2664,18 @@ static int read_entry(
 
 		memcpy(tmp_path, last, prefix_len);
 		memcpy(tmp_path + prefix_len, path_ptr + varint_len, suffix_len + 1);
-		entry_size = index_entry_size(suffix_len, varint_len, entry.flags);
+
+		entry_size = index_entry_size(suffix_len, varint_len, index->oid_type, entry.flags);
 		entry.path = tmp_path;
 	}
 
 	if (entry_size == 0)
 		return -1;
 
-	if (checksum_size + entry_size > buffer_size)
+	if (checksum_size + entry_size > buffer_size) {
+		git_error_set(GIT_ERROR_INTERNAL, "invalid index checksum");
 		return -1;
+	}
 
 	if (index_entry_dup(out, index, &entry) < 0) {
 		git__free(tmp_path);
@@ -2579,11 +2704,10 @@ static int read_header(struct index_header *dest, const void *buffer)
 	return 0;
 }
 
-static int read_extension(size_t *read_len, git_index *index, const char *buffer, size_t buffer_size)
+static int read_extension(size_t *read_len, git_index *index, size_t checksum_size, const char *buffer, size_t buffer_size)
 {
 	struct index_extension dest;
 	size_t total_size;
-	size_t checksum_size = GIT_HASH_SHA1_SIZE;
 
 	/* buffer is not guaranteed to be aligned */
 	memcpy(&dest, buffer, sizeof(struct index_extension));
@@ -2602,7 +2726,7 @@ static int read_extension(size_t *read_len, git_index *index, const char *buffer
 	if (dest.signature[0] >= 'A' && dest.signature[0] <= 'Z') {
 		/* tree cache */
 		if (memcmp(dest.signature, INDEX_EXT_TREECACHE_SIG, 4) == 0) {
-			if (git_tree_cache_read(&index->tree, buffer + 8, dest.extension_size, &index->tree_pool) < 0)
+			if (git_tree_cache_read(&index->tree, buffer + 8, dest.extension_size, index->oid_type, &index->tree_pool) < 0)
 				return -1;
 		} else if (memcmp(dest.signature, INDEX_EXT_UNMERGED_SIG, 4) == 0) {
 			if (read_reuc(index, buffer + 8, dest.extension_size) < 0)
@@ -2630,8 +2754,8 @@ static int parse_index(git_index *index, const char *buffer, size_t buffer_size)
 	int error = 0;
 	unsigned int i;
 	struct index_header header = { 0 };
-	unsigned char checksum[GIT_HASH_SHA1_SIZE];
-	size_t checksum_size = GIT_HASH_SHA1_SIZE;
+	unsigned char checksum[GIT_HASH_MAX_SIZE];
+	size_t checksum_size = git_hash_size(git_oid_algorithm(index->oid_type));
 	const char *last = NULL;
 	const char *empty = "";
 
@@ -2646,9 +2770,12 @@ static int parse_index(git_index *index, const char *buffer, size_t buffer_size)
 	if (buffer_size < INDEX_HEADER_SIZE + checksum_size)
 		return index_error_invalid("insufficient buffer space");
 
-	/* Precalculate the SHA1 of the files's contents -- we'll match it to
-	 * the provided SHA1 in the footer */
-	git_hash_buf(checksum, buffer, buffer_size - checksum_size, GIT_HASH_ALGORITHM_SHA1);
+	/*
+	 * Precalculate the hash of the files's contents -- we'll match
+	 * it to the provided checksum in the footer.
+	 */
+	git_hash_buf(checksum, buffer, buffer_size - checksum_size,
+		git_oid_algorithm(index->oid_type));
 
 	/* Parse header */
 	if ((error = read_header(&header, buffer)) < 0)
@@ -2670,7 +2797,7 @@ static int parse_index(git_index *index, const char *buffer, size_t buffer_size)
 		git_index_entry *entry = NULL;
 		size_t entry_size;
 
-		if ((error = read_entry(&entry, &entry_size, index, buffer, buffer_size, last)) < 0) {
+		if ((error = read_entry(&entry, &entry_size, index, checksum_size, buffer, buffer_size, last)) < 0) {
 			error = index_error_invalid("invalid entry");
 			goto done;
 		}
@@ -2701,7 +2828,7 @@ static int parse_index(git_index *index, const char *buffer, size_t buffer_size)
 	while (buffer_size > checksum_size) {
 		size_t extension_size;
 
-		if ((error = read_extension(&extension_size, index, buffer, buffer_size)) < 0) {
+		if ((error = read_extension(&extension_size, index, checksum_size, buffer, buffer_size)) < 0) {
 			goto done;
 		}
 
@@ -2714,7 +2841,10 @@ static int parse_index(git_index *index, const char *buffer, size_t buffer_size)
 		goto done;
 	}
 
-	/* 160-bit SHA-1 over the content of the index file before this checksum. */
+	/*
+	 * SHA-1 or SHA-256 (depending on the repository's object format)
+	 * over the content of the index file before this checksum.
+	 */
 	if (memcmp(checksum, buffer, checksum_size) != 0) {
 		error = index_error_invalid(
 			"calculated checksum does not match expected");
@@ -2754,16 +2884,40 @@ static bool is_index_extended(git_index *index)
 	return (extended > 0);
 }
 
-static int write_disk_entry(git_filebuf *file, git_index_entry *entry, const char *last)
+static int write_disk_entry(
+	git_index *index,
+	git_filebuf *file,
+	git_index_entry *entry,
+	const char *last)
 {
 	void *mem = NULL;
-	struct entry_short ondisk;
-	size_t path_len, disk_size;
+	struct entry_common *ondisk_common;
+	size_t path_len, path_offset, disk_size;
 	int varint_len = 0;
 	char *path;
 	const char *path_start = entry->path;
 	size_t same_len = 0;
 
+	index_entry_short_sha1 ondisk_sha1;
+	index_entry_long_sha1 ondisk_ext_sha1;
+#ifdef GIT_EXPERIMENTAL_SHA256
+	index_entry_short_sha256 ondisk_sha256;
+	index_entry_long_sha256 ondisk_ext_sha256;
+#endif
+
+	switch (index->oid_type) {
+	case GIT_OID_SHA1:
+		ondisk_common = &ondisk_sha1.common;
+		break;
+#ifdef GIT_EXPERIMENTAL_SHA256
+	case GIT_OID_SHA256:
+		ondisk_common = &ondisk_sha256.common;
+		break;
+#endif
+	default:
+		GIT_ASSERT(!"invalid oid type");
+	}
+
 	path_len = ((struct entry_internal *)entry)->pathlen;
 
 	if (last) {
@@ -2780,9 +2934,9 @@ static int write_disk_entry(git_filebuf *file, git_index_entry *entry, const cha
 		varint_len = git_encode_varint(NULL, 0, strlen(last) - same_len);
 	}
 
-	disk_size = index_entry_size(path_len, varint_len, entry->flags);
+	disk_size = index_entry_size(path_len, varint_len, index->oid_type, entry->flags);
 
-	if (git_filebuf_reserve(file, &mem, disk_size) < 0)
+	if (!disk_size || git_filebuf_reserve(file, &mem, disk_size) < 0)
 		return -1;
 
 	memset(mem, 0x0, disk_size);
@@ -2797,35 +2951,77 @@ static int write_disk_entry(git_filebuf *file, git_index_entry *entry, const cha
 	 *
 	 * In 2038 I will be either too dead or too rich to care about this
 	 */
-	ondisk.ctime.seconds = htonl((uint32_t)entry->ctime.seconds);
-	ondisk.mtime.seconds = htonl((uint32_t)entry->mtime.seconds);
-	ondisk.ctime.nanoseconds = htonl(entry->ctime.nanoseconds);
-	ondisk.mtime.nanoseconds = htonl(entry->mtime.nanoseconds);
-	ondisk.dev = htonl(entry->dev);
-	ondisk.ino = htonl(entry->ino);
-	ondisk.mode = htonl(entry->mode);
-	ondisk.uid = htonl(entry->uid);
-	ondisk.gid = htonl(entry->gid);
-	ondisk.file_size = htonl((uint32_t)entry->file_size);
-	git_oid_raw_cpy(ondisk.oid, entry->id.id, GIT_OID_SHA1_SIZE);
-	ondisk.flags = htons(entry->flags);
+	ondisk_common->ctime.seconds = htonl((uint32_t)entry->ctime.seconds);
+	ondisk_common->mtime.seconds = htonl((uint32_t)entry->mtime.seconds);
+	ondisk_common->ctime.nanoseconds = htonl(entry->ctime.nanoseconds);
+	ondisk_common->mtime.nanoseconds = htonl(entry->mtime.nanoseconds);
+	ondisk_common->dev = htonl(entry->dev);
+	ondisk_common->ino = htonl(entry->ino);
+	ondisk_common->mode = htonl(entry->mode);
+	ondisk_common->uid = htonl(entry->uid);
+	ondisk_common->gid = htonl(entry->gid);
+	ondisk_common->file_size = htonl((uint32_t)entry->file_size);
+
+	switch (index->oid_type) {
+	case GIT_OID_SHA1:
+		git_oid_raw_cpy(ondisk_sha1.oid, entry->id.id, GIT_OID_SHA1_SIZE);
+		ondisk_sha1.flags = htons(entry->flags);
+		break;
+#ifdef GIT_EXPERIMENTAL_SHA256
+	case GIT_OID_SHA256:
+		git_oid_raw_cpy(ondisk_sha256.oid, entry->id.id, GIT_OID_SHA256_SIZE);
+		ondisk_sha256.flags = htons(entry->flags);
+		break;
+#endif
+	default:
+		GIT_ASSERT(!"invalid oid type");
+	}
+
+	path_offset = index_entry_path_offset(index->oid_type, entry->flags);
 
 	if (entry->flags & GIT_INDEX_ENTRY_EXTENDED) {
-		const size_t path_offset = offsetof(struct entry_long, path);
-		struct entry_long ondisk_ext;
-		memcpy(&ondisk_ext, &ondisk, sizeof(struct entry_short));
-		ondisk_ext.flags_extended = htons(entry->flags_extended &
+		struct entry_common *ondisk_ext;
+		uint16_t flags_extended = htons(entry->flags_extended &
 			GIT_INDEX_ENTRY_EXTENDED_FLAGS);
-		memcpy(mem, &ondisk_ext, path_offset);
-		path = (char *)mem + path_offset;
-		disk_size -= path_offset;
+
+		switch (index->oid_type) {
+		case GIT_OID_SHA1:
+			memcpy(&ondisk_ext_sha1, &ondisk_sha1,
+				sizeof(index_entry_short_sha1));
+			ondisk_ext_sha1.flags_extended = flags_extended;
+			ondisk_ext = &ondisk_ext_sha1.common;
+			break;
+#ifdef GIT_EXPERIMENTAL_SHA256
+		case GIT_OID_SHA256:
+			memcpy(&ondisk_ext_sha256, &ondisk_sha256,
+				sizeof(index_entry_short_sha256));
+			ondisk_ext_sha256.flags_extended = flags_extended;
+			ondisk_ext = &ondisk_ext_sha256.common;
+			break;
+#endif
+		default:
+			GIT_ASSERT(!"invalid oid type");
+		}
+
+		memcpy(mem, ondisk_ext, path_offset);
 	} else {
-		const size_t path_offset = offsetof(struct entry_short, path);
-		memcpy(mem, &ondisk, path_offset);
-		path = (char *)mem + path_offset;
-		disk_size -= path_offset;
+		switch (index->oid_type) {
+		case GIT_OID_SHA1:
+			memcpy(mem, &ondisk_sha1, path_offset);
+			break;
+#ifdef GIT_EXPERIMENTAL_SHA256
+		case GIT_OID_SHA256:
+			memcpy(mem, &ondisk_sha256, path_offset);
+			break;
+#endif
+		default:
+			GIT_ASSERT(!"invalid oid type");
+		}
 	}
 
+	path = (char *)mem + path_offset;
+	disk_size -= path_offset;
+
 	if (last) {
 		varint_len = git_encode_varint((unsigned char *) path,
 					  disk_size, strlen(last) - same_len);
@@ -2877,7 +3073,7 @@ static int write_entries(git_index *index, git_filebuf *file)
 		last = "";
 
 	git_vector_foreach(entries, i, entry) {
-		if ((error = write_disk_entry(file, entry, last)) < 0)
+		if ((error = write_disk_entry(index, file, entry, last)) < 0)
 			break;
 		if (index->version >= INDEX_VERSION_NUMBER_COMP)
 			last = entry->path;
@@ -2955,8 +3151,9 @@ done:
 	return error;
 }
 
-static int create_reuc_extension_data(git_str *reuc_buf, git_index_reuc_entry *reuc)
+static int create_reuc_extension_data(git_str *reuc_buf, git_index *index, git_index_reuc_entry *reuc)
 {
+	size_t oid_size = git_oid_size(index->oid_type);
 	int i;
 	int error = 0;
 
@@ -2970,7 +3167,7 @@ static int create_reuc_extension_data(git_str *reuc_buf, git_index_reuc_entry *r
 	}
 
 	for (i = 0; i < 3; i++) {
-		if (reuc->mode[i] && (error = git_str_put(reuc_buf, (char *)&reuc->oid[i].id, GIT_OID_SHA1_SIZE)) < 0)
+		if (reuc->mode[i] && (error = git_str_put(reuc_buf, (char *)&reuc->oid[i].id, oid_size)) < 0)
 			return error;
 	}
 
@@ -2987,7 +3184,7 @@ static int write_reuc_extension(git_index *index, git_filebuf *file)
 	int error = 0;
 
 	git_vector_foreach(out, i, reuc) {
-		if ((error = create_reuc_extension_data(&reuc_buf, reuc)) < 0)
+		if ((error = create_reuc_extension_data(&reuc_buf, index, reuc)) < 0)
 			goto done;
 	}
 
@@ -3036,7 +3233,7 @@ static void clear_uptodate(git_index *index)
 }
 
 static int write_index(
-	unsigned char checksum[GIT_HASH_SHA1_SIZE],
+	unsigned char checksum[GIT_HASH_MAX_SIZE],
 	size_t *checksum_size,
 	git_index *index,
 	git_filebuf *file)
@@ -3048,7 +3245,9 @@ static int write_index(
 	GIT_ASSERT_ARG(index);
 	GIT_ASSERT_ARG(file);
 
-	*checksum_size = GIT_HASH_SHA1_SIZE;
+	GIT_ASSERT(index->oid_type);
+
+	*checksum_size = git_hash_size(git_oid_algorithm(index->oid_type));
 
 	if (index->version <= INDEX_VERSION_NUMBER_EXT)  {
 		is_extended = is_index_extended(index);
@@ -3209,7 +3408,7 @@ cleanup:
 	if (error < 0)
 		return error;
 
-	error = git_tree_cache_read_tree(&index->tree, tree, &index->tree_pool);
+	error = git_tree_cache_read_tree(&index->tree, tree, index->oid_type, &index->tree_pool);
 
 	return error;
 }
@@ -3674,7 +3873,7 @@ int git_indexwriter_init(
 
 	writer->index = index;
 
-	filebuf_hash = git_filebuf_hash_flags(git_oid_algorithm(GIT_OID_SHA1));
+	filebuf_hash = git_filebuf_hash_flags(git_oid_algorithm(index->oid_type));
 	GIT_ASSERT(filebuf_hash);
 
 	if (!index->index_file_path)
@@ -3716,7 +3915,7 @@ int git_indexwriter_init_for_operation(
 
 int git_indexwriter_commit(git_indexwriter *writer)
 {
-	unsigned char checksum[GIT_HASH_SHA1_SIZE];
+	unsigned char checksum[GIT_HASH_MAX_SIZE];
 	size_t checksum_size;
 	int error;
 

src/libgit2/index.h

@@ -27,7 +27,7 @@ struct git_index {
 
 	char *index_file_path;
 	git_futils_filestamp stamp;
-	unsigned char checksum[GIT_HASH_SHA1_SIZE];
+	unsigned char checksum[GIT_HASH_MAX_SIZE];
 
 	git_vector entries;
 	git_idxmap *entries_map;
@@ -35,6 +35,8 @@ struct git_index {
 	git_vector deleted; /* deleted entries if readers > 0 */
 	git_atomic32 readers; /* number of active iterators */
 
+	git_oid_t oid_type;
+
 	unsigned int on_disk:1;
 	unsigned int ignore_case:1;
 	unsigned int distrust_filemode:1;
@@ -141,6 +143,17 @@ GIT_INLINE(unsigned char *) git_index__checksum(git_index *index)
 	return index->checksum;
 }
 
+/* SHA256-aware internal functions */
+
+extern int git_index__new(
+	git_index **index_out,
+	git_oid_t oid_type);
+
+extern int git_index__open(
+	git_index **index_out,
+	const char *index_path,
+	git_oid_t oid_type);
+
 /* Copy the current entries vector *and* increment the index refcount.
  * Call `git_index__release_snapshot` when done.
  */

src/libgit2/merge.c

@@ -1997,8 +1997,11 @@ static int index_update_reuc(git_index *index, git_merge_diff_list *diff_list)
 	return 0;
 }
 
-static int index_from_diff_list(git_index **out,
-	git_merge_diff_list *diff_list, bool skip_reuc)
+static int index_from_diff_list(
+	git_index **out,
+	git_merge_diff_list *diff_list,
+	git_oid_t oid_type,
+	bool skip_reuc)
 {
 	git_index *index;
 	size_t i;
@@ -2007,7 +2010,7 @@ static int index_from_diff_list(git_index **out,
 
 	*out = NULL;
 
-	if ((error = git_index_new(&index)) < 0)
+	if ((error = git_index__new(&index, oid_type)) < 0)
 		return error;
 
 	if ((error = git_index__fill(index, &diff_list->staged)) < 0)
@@ -2157,7 +2160,7 @@ int git_merge__iterators(
 		}
 	}
 
-	error = index_from_diff_list(out, diff_list,
+	error = index_from_diff_list(out, diff_list, repo->oid_type,
 		(opts.flags & GIT_MERGE_SKIP_REUC));
 
 done:
@@ -2200,8 +2203,8 @@ int git_merge_trees(
 			result = our_tree;
 
 		if (result) {
-			if ((error = git_index_new(out)) == 0)
-    			error = git_index_read_tree(*out, result);
+			if ((error = git_index__new(out, repo->oid_type)) == 0)
+				error = git_index_read_tree(*out, result);
 
 			return error;
 		}

src/libgit2/repository.c

@@ -1547,7 +1547,8 @@ int git_repository_index__weakptr(git_index **out, git_repository *repo)
 		if ((error = repository_index_path(&index_path, repo)) < 0)
 			return error;
 
-		error = git_index_open(&index, index_path.ptr);
+		error = git_index__open(&index, index_path.ptr, repo->oid_type);
+
 		if (!error) {
 			GIT_REFCOUNT_OWN(index, repo);
 

src/libgit2/stash.c

@@ -284,7 +284,7 @@ static int build_untracked_tree(
 	struct stash_update_rules data = {0};
 	int error;
 
-	if ((error = git_index_new(&i_index)) < 0)
+	if ((error = git_index__new(&i_index, repo->oid_type)) < 0)
 		goto cleanup;
 
 	if (flags & GIT_STASH_INCLUDE_UNTRACKED) {
@@ -487,7 +487,7 @@ static int commit_worktree(
 	int error = 0, ignorecase;
 
 	if ((error = git_repository_index(&r_index, repo) < 0) ||
-	    (error = git_index_new(&i_index)) < 0 ||
+	    (error = git_index__new(&i_index, repo->oid_type)) < 0 ||
 	    (error = git_index__fill(i_index, &r_index->entries) < 0) ||
 	    (error = git_repository__configmap_lookup(&ignorecase, repo, GIT_CONFIGMAP_IGNORECASE)) < 0)
 		goto cleanup;
@@ -732,7 +732,7 @@ int git_stash_save_with_opts(
 					     i_commit, b_commit, u_commit)) < 0)
 			goto cleanup;
 	} else {
-		if ((error = git_index_new(&paths_index)) < 0 ||
+		if ((error = git_index__new(&paths_index, repo->oid_type)) < 0 ||
 		    (error = retrieve_head(&head, repo)) < 0 ||
 		    (error = git_reference_peel((git_object**)&tree, head, GIT_OBJECT_TREE)) < 0 ||
 		    (error = git_index_read_tree(paths_index, tree)) < 0 ||
@@ -1003,6 +1003,7 @@ static int stage_new_file(const git_index_entry **entries, void *data)
 
 static int stage_new_files(
 	git_index **out,
+	git_repository *repo,
 	git_tree *parent_tree,
 	git_tree *tree)
 {
@@ -1011,7 +1012,7 @@ static int stage_new_files(
 	git_index *index = NULL;
 	int error;
 
-	if ((error = git_index_new(&index)) < 0 ||
+	if ((error = git_index__new(&index, repo->oid_type)) < 0 ||
 		(error = git_iterator_for_tree(
 			&iterators[0], parent_tree, &iterator_options)) < 0 ||
 		(error = git_iterator_for_tree(
@@ -1095,10 +1096,10 @@ int git_stash_apply(
 	 * previously unstaged contents are staged, not the previously staged.)
 	 */
 	} else if ((opts.flags & GIT_STASH_APPLY_REINSTATE_INDEX) == 0) {
-		if ((error = stage_new_files(
-				&stash_adds, stash_parent_tree, stash_tree)) < 0 ||
-			(error = merge_indexes(
-				&unstashed_index, repo, stash_parent_tree, repo_index, stash_adds)) < 0)
+		if ((error = stage_new_files(&stash_adds, repo,
+				stash_parent_tree, stash_tree)) < 0 ||
+		    (error = merge_indexes(&unstashed_index, repo,
+				stash_parent_tree, repo_index, stash_adds)) < 0)
 			goto cleanup;
 	}
 

src/libgit2/tree-cache.c

@@ -71,12 +71,16 @@ const git_tree_cache *git_tree_cache_get(const git_tree_cache *tree, const char
 	}
 }
 
-static int read_tree_internal(git_tree_cache **out,
-			      const char **buffer_in, const char *buffer_end,
-			      git_pool *pool)
+static int read_tree_internal(
+	git_tree_cache **out,
+	const char **buffer_in,
+	const char *buffer_end,
+	git_oid_t oid_type,
+	git_pool *pool)
 {
 	git_tree_cache *tree = NULL;
 	const char *name_start, *buffer;
+	size_t oid_size = git_oid_size(oid_type);
 	int count;
 
 	buffer = name_start = *buffer_in;
@@ -87,7 +91,7 @@ static int read_tree_internal(git_tree_cache **out,
 	if (++buffer >= buffer_end)
 		goto corrupted;
 
-	if (git_tree_cache_new(&tree, name_start, pool) < 0)
+	if (git_tree_cache_new(&tree, name_start, oid_type, pool) < 0)
 		return -1;
 
 	/* Blank-terminated ASCII decimal number of entries in this tree */
@@ -108,14 +112,14 @@ static int read_tree_internal(git_tree_cache **out,
 	if (*buffer != '\n' || ++buffer > buffer_end)
 		goto corrupted;
 
-	/* The SHA1 is only there if it's not invalidated */
+	/* The OID is only there if it's not invalidated */
 	if (tree->entry_count >= 0) {
 		/* 160-bit SHA-1 for this tree and it's children */
-		if (buffer + GIT_OID_SHA1_SIZE > buffer_end)
+		if (buffer + oid_size > buffer_end)
 			goto corrupted;
 
-		git_oid__fromraw(&tree->oid, (const unsigned char *)buffer, GIT_OID_SHA1);
-		buffer += GIT_OID_SHA1_SIZE;
+		git_oid__fromraw(&tree->oid, (const unsigned char *)buffer, oid_type);
+		buffer += oid_size;
 	}
 
 	/* Parse children: */
@@ -130,7 +134,7 @@ static int read_tree_internal(git_tree_cache **out,
 		memset(tree->children, 0x0, bufsize);
 
 		for (i = 0; i < tree->children_count; ++i) {
-			if (read_tree_internal(&tree->children[i], &buffer, buffer_end, pool) < 0)
+			if (read_tree_internal(&tree->children[i], &buffer, buffer_end, oid_type, pool) < 0)
 				goto corrupted;
 		}
 	}
@@ -144,11 +148,16 @@ static int read_tree_internal(git_tree_cache **out,
 	return -1;
 }
 
-int git_tree_cache_read(git_tree_cache **tree, const char *buffer, size_t buffer_size, git_pool *pool)
+int git_tree_cache_read(
+	git_tree_cache **tree,
+	const char *buffer,
+	size_t buffer_size,
+	git_oid_t oid_type,
+	git_pool *pool)
 {
 	const char *buffer_end = buffer + buffer_size;
 
-	if (read_tree_internal(tree, &buffer, buffer_end, pool) < 0)
+	if (read_tree_internal(tree, &buffer, buffer_end, oid_type, pool) < 0)
 		return -1;
 
 	if (buffer < buffer_end) {
@@ -201,7 +210,7 @@ static int read_tree_recursive(git_tree_cache *cache, const git_tree *tree, git_
 			continue;
 		}
 
-		if ((error = git_tree_cache_new(&cache->children[j], git_tree_entry_name(entry), pool)) < 0)
+		if ((error = git_tree_cache_new(&cache->children[j], git_tree_entry_name(entry), cache->oid_type, pool)) < 0)
 			return error;
 
 		if ((error = git_tree_lookup(&subtree, repo, git_tree_entry_id(entry))) < 0)
@@ -219,12 +228,12 @@ static int read_tree_recursive(git_tree_cache *cache, const git_tree *tree, git_
 	return 0;
 }
 
-int git_tree_cache_read_tree(git_tree_cache **out, const git_tree *tree, git_pool *pool)
+int git_tree_cache_read_tree(git_tree_cache **out, const git_tree *tree, git_oid_t oid_type, git_pool *pool)
 {
 	int error;
 	git_tree_cache *cache;
 
-	if ((error = git_tree_cache_new(&cache, "", pool)) < 0)
+	if ((error = git_tree_cache_new(&cache, "", oid_type, pool)) < 0)
 		return error;
 
 	if ((error = read_tree_recursive(cache, tree, pool)) < 0)
@@ -234,7 +243,7 @@ int git_tree_cache_read_tree(git_tree_cache **out, const git_tree *tree, git_poo
 	return 0;
 }
 
-int git_tree_cache_new(git_tree_cache **out, const char *name, git_pool *pool)
+int git_tree_cache_new(git_tree_cache **out, const char *name, git_oid_t oid_type, git_pool *pool)
 {
 	size_t name_len, alloc_size;
 	git_tree_cache *tree;
@@ -248,6 +257,7 @@ int git_tree_cache_new(git_tree_cache **out, const char *name, git_pool *pool)
 
 	memset(tree, 0x0, sizeof(git_tree_cache));
 	/* NUL-terminated tree name */
+	tree->oid_type = oid_type;
 	tree->namelen = name_len;
 	memcpy(tree->name, name, name_len);
 	tree->name[name_len] = '\0';
@@ -263,7 +273,7 @@ static void write_tree(git_str *out, git_tree_cache *tree)
 	git_str_printf(out, "%s%c%"PRIdZ" %"PRIuZ"\n", tree->name, 0, tree->entry_count, tree->children_count);
 
 	if (tree->entry_count != -1)
-		git_str_put(out, (char *)&tree->oid.id, GIT_OID_SHA1_SIZE);
+		git_str_put(out, (char *)&tree->oid.id, git_oid_size(tree->oid_type));
 
 	for (i = 0; i < tree->children_count; i++)
 		write_tree(out, tree->children[i]);

src/libgit2/tree-cache.h

@@ -18,6 +18,8 @@ typedef struct git_tree_cache {
 	struct git_tree_cache **children;
 	size_t children_count;
 
+	git_oid_t oid_type;
+
 	ssize_t entry_count;
 	git_oid oid;
 	size_t namelen;
@@ -25,14 +27,14 @@ typedef struct git_tree_cache {
 } git_tree_cache;
 
 int git_tree_cache_write(git_str *out, git_tree_cache *tree);
-int git_tree_cache_read(git_tree_cache **tree, const char *buffer, size_t buffer_size, git_pool *pool);
+int git_tree_cache_read(git_tree_cache **tree, const char *buffer, size_t buffer_size, git_oid_t oid_type, git_pool *pool);
 void git_tree_cache_invalidate_path(git_tree_cache *tree, const char *path);
 const git_tree_cache *git_tree_cache_get(const git_tree_cache *tree, const char *path);
-int git_tree_cache_new(git_tree_cache **out, const char *name, git_pool *pool);
+int git_tree_cache_new(git_tree_cache **out, const char *name, git_oid_t oid_type, git_pool *pool);
 /**
  * Read a tree as the root of the tree cache (like for `git read-tree`)
  */
-int git_tree_cache_read_tree(git_tree_cache **out, const git_tree *tree, git_pool *pool);
+int git_tree_cache_read_tree(git_tree_cache **out, const git_tree *tree, git_oid_t oid_type, git_pool *pool);
 void git_tree_cache_free(git_tree_cache *tree);
 
 #endif

src/libgit2/tree.c

@@ -731,7 +731,7 @@ int git_tree__write_index(
 		return ret;
 
 	/* Read the tree cache into the index */
-	ret = git_tree_cache_read_tree(&index->tree, tree, &index->tree_pool);
+	ret = git_tree_cache_read_tree(&index->tree, tree, index->oid_type, &index->tree_pool);
 	git_tree_free(tree);
 
 	return ret;

tests/libgit2/checkout/index.c

@@ -4,6 +4,7 @@
 #include "git2/checkout.h"
 #include "futils.h"
 #include "repository.h"
+#include "index.h"
 #include "remote.h"
 #include "repo/repo_helpers.h"
 
@@ -834,7 +835,7 @@ void test_checkout_index__adding_conflict_removes_stage_0(void)
 	git_index *new_index, *index;
 	git_checkout_options opts = GIT_CHECKOUT_OPTIONS_INIT;
 
-	cl_git_pass(git_index_new(&new_index));
+	cl_git_pass(git_index__new(&new_index, GIT_OID_SHA1));
 
 	add_conflict(new_index, "new.txt");
 	cl_git_pass(git_checkout_index(g_repo, new_index, &opts));

tests/libgit2/clone/nonetwork.c

@@ -5,6 +5,7 @@
 #include "remote.h"
 #include "futils.h"
 #include "repository.h"
+#include "index.h"
 
 #define LIVE_REPO_URL "git://github.com/libgit2/TestGitRepository"
 
@@ -271,7 +272,7 @@ void test_clone_nonetwork__clone_tag_to_tree(void)
 
 	stage = cl_git_sandbox_init("testrepo.git");
 	cl_git_pass(git_repository_odb(&odb, stage));
-	cl_git_pass(git_index_new(&index));
+	cl_git_pass(git_index__new(&index, GIT_OID_SHA1));
 
 	memset(&entry, 0, sizeof(git_index_entry));
 	entry.path = file_path;

tests/libgit2/diff/index.c

@@ -1,5 +1,6 @@
 #include "clar_libgit2.h"
 #include "diff_helpers.h"
+#include "index.h"
 
 static git_repository *g_repo = NULL;
 
@@ -278,7 +279,7 @@ void test_diff_index__to_index(void)
 	git_diff *diff;
 	diff_expects exp;
 
-	cl_git_pass(git_index_new(&old_index));
+	cl_git_pass(git_index__new(&old_index, GIT_OID_SHA1));
 	old_tree = resolve_commit_oid_to_tree(g_repo, a_commit);
 	cl_git_pass(git_index_read_tree(old_index, old_tree));
 

tests/libgit2/index/cache.c

@@ -24,7 +24,7 @@ void test_index_cache__write_extension_at_root(void)
 	const char *tree_id_str = "45dd856fdd4d89b884c340ba0e047752d9b085d6";
 	const char *index_file = "index-tree";
 
-	cl_git_pass(git_index_open(&index, index_file));
+	cl_git_pass(git_index__open(&index, index_file, GIT_OID_SHA1));
 	cl_assert(index->tree == NULL);
 	cl_git_pass(git_oid__fromstr(&id, tree_id_str, GIT_OID_SHA1));
 	cl_git_pass(git_tree_lookup(&tree, g_repo, &id));
@@ -35,7 +35,7 @@ void test_index_cache__write_extension_at_root(void)
 	cl_git_pass(git_index_write(index));
 	git_index_free(index);
 
-	cl_git_pass(git_index_open(&index, index_file));
+	cl_git_pass(git_index__open(&index, index_file, GIT_OID_SHA1));
 	cl_assert(index->tree);
 
 	cl_assert_equal_i(git_index_entrycount(index), index->tree->entry_count);
@@ -56,7 +56,7 @@ void test_index_cache__write_extension_invalidated_root(void)
 	const char *index_file = "index-tree-invalidated";
 	git_index_entry entry;
 
-	cl_git_pass(git_index_open(&index, index_file));
+	cl_git_pass(git_index__open(&index, index_file, GIT_OID_SHA1));
 	cl_assert(index->tree == NULL);
 	cl_git_pass(git_oid__fromstr(&id, tree_id_str, GIT_OID_SHA1));
 	cl_git_pass(git_tree_lookup(&tree, g_repo, &id));
@@ -77,7 +77,7 @@ void test_index_cache__write_extension_invalidated_root(void)
 	cl_git_pass(git_index_write(index));
 	git_index_free(index);
 
-	cl_git_pass(git_index_open(&index, index_file));
+	cl_git_pass(git_index__open(&index, index_file, GIT_OID_SHA1));
 	cl_assert(index->tree);
 
 	cl_assert_equal_i(-1, index->tree->entry_count);
@@ -96,7 +96,7 @@ void test_index_cache__read_tree_no_children(void)
 	git_tree *tree;
 	git_oid id;
 
-	cl_git_pass(git_index_new(&index));
+	cl_git_pass(git_index__new(&index, GIT_OID_SHA1));
 	cl_assert(index->tree == NULL);
 	cl_git_pass(git_oid__fromstr(&id, "45dd856fdd4d89b884c340ba0e047752d9b085d6", GIT_OID_SHA1));
 	cl_git_pass(git_tree_lookup(&tree, g_repo, &id));

tests/libgit2/index/inmemory.c

@@ -1,10 +1,11 @@
 #include "clar_libgit2.h"
+#include "index.h"
 
 void test_index_inmemory__can_create_an_inmemory_index(void)
 {
 	git_index *index;
 
-	cl_git_pass(git_index_new(&index));
+	cl_git_pass(git_index__new(&index, GIT_OID_SHA1));
 	cl_assert_equal_i(0, (int)git_index_entrycount(index));
 
 	git_index_free(index);
@@ -14,7 +15,7 @@ void test_index_inmemory__cannot_add_bypath_to_an_inmemory_index(void)
 {
 	git_index *index;
 
-	cl_git_pass(git_index_new(&index));
+	cl_git_pass(git_index__new(&index, GIT_OID_SHA1));
 
 	cl_assert_equal_i(GIT_ERROR, git_index_add_bypath(index, "test.txt"));
 

tests/libgit2/index/racy.c

@@ -287,7 +287,7 @@ void test_index_racy__read_index_smudges(void)
 	setup_race();
 
 	cl_git_pass(git_repository_index(&index, g_repo));
-	cl_git_pass(git_index_new(&newindex));
+	cl_git_pass(git_index__new(&newindex, GIT_OID_SHA1));
 	cl_git_pass(git_index_read_index(newindex, index));
 
 	cl_assert(entry = git_index_get_bypath(newindex, "A", 0));
@@ -305,7 +305,7 @@ void test_index_racy__read_index_clears_uptodate_bit(void)
 	setup_uptodate_files();
 
 	cl_git_pass(git_repository_index(&index, g_repo));
-	cl_git_pass(git_index_new(&newindex));
+	cl_git_pass(git_index__new(&newindex, GIT_OID_SHA1));
 	cl_git_pass(git_index_read_index(newindex, index));
 
 	/* ensure that files brought in from the other index are not uptodate */

tests/libgit2/index/read_index.c

@@ -42,7 +42,7 @@ void test_index_read_index__maintains_stat_cache(void)
 
 	/* read-tree, then read index */
 	git_tree_lookup(&tree, _repo, &index_id);
-	cl_git_pass(git_index_new(&new_index));
+	cl_git_pass(git_index__new(&new_index, GIT_OID_SHA1));
 	cl_git_pass(git_index_read_tree(new_index, tree));
 	git_tree_free(tree);
 
@@ -81,7 +81,7 @@ static bool roundtrip_with_read_index(const char *tree_idstr)
 
 	cl_git_pass(git_oid__fromstr(&tree_id, tree_idstr, GIT_OID_SHA1));
 	cl_git_pass(git_tree_lookup(&tree, _repo, &tree_id));
-	cl_git_pass(git_index_new(&tree_index));
+	cl_git_pass(git_index__new(&tree_index, GIT_OID_SHA1));
 	cl_git_pass(git_index_read_tree(tree_index, tree));
 	cl_git_pass(git_index_read_index(_index, tree_index));
 	cl_git_pass(git_index_write_tree(&new_tree_id, _index));
@@ -113,12 +113,12 @@ void test_index_read_index__read_and_writes(void)
 
 	cl_git_pass(git_oid__fromstr(&tree_id, "ae90f12eea699729ed24555e40b9fd669da12a12", GIT_OID_SHA1));
 	cl_git_pass(git_tree_lookup(&tree, _repo, &tree_id));
-	cl_git_pass(git_index_new(&tree_index));
+	cl_git_pass(git_index__new(&tree_index, GIT_OID_SHA1));
 	cl_git_pass(git_index_read_tree(tree_index, tree));
 	cl_git_pass(git_index_read_index(_index, tree_index));
 	cl_git_pass(git_index_write(_index));
 
-	cl_git_pass(git_index_open(&new_index, git_index_path(_index)));
+	cl_git_pass(git_index__open(&new_index, git_index_path(_index), GIT_OID_SHA1));
 	cl_git_pass(git_index_write_tree_to(&new_tree_id, new_index, _repo));
 
 	cl_assert_equal_oid(&tree_id, &new_tree_id);
@@ -174,8 +174,8 @@ void test_index_read_index__handles_conflicts(void)
 
 	cl_git_pass(git_oid__fromstr(&tree_id, "ae90f12eea699729ed24555e40b9fd669da12a12", GIT_OID_SHA1));
 	cl_git_pass(git_tree_lookup(&tree, _repo, &tree_id));
-	cl_git_pass(git_index_new(&index));
-	cl_git_pass(git_index_new(&new_index));
+	cl_git_pass(git_index__new(&index, GIT_OID_SHA1));
+	cl_git_pass(git_index__new(&new_index, GIT_OID_SHA1));
 	cl_git_pass(git_index_read_tree(index, tree));
 	cl_git_pass(git_index_read_tree(new_index, tree));
 

tests/libgit2/index/tests.c

@@ -81,7 +81,7 @@ void test_index_tests__empty_index(void)
 {
    git_index *index;
 
-   cl_git_pass(git_index_open(&index, "in-memory-index"));
+   cl_git_pass(git_index__open(&index, "in-memory-index", GIT_OID_SHA1));
    cl_assert(index->on_disk == 0);
 
    cl_assert(git_index_entrycount(index) == 0);
@@ -96,7 +96,7 @@ void test_index_tests__default_test_index(void)
    unsigned int i;
    git_index_entry **entries;
 
-   cl_git_pass(git_index_open(&index, TEST_INDEX_PATH));
+   cl_git_pass(git_index__open(&index, TEST_INDEX_PATH, GIT_OID_SHA1));
    cl_assert(index->on_disk);
 
    cl_assert(git_index_entrycount(index) == index_entry_count);
@@ -119,7 +119,7 @@ void test_index_tests__gitgit_index(void)
 {
    git_index *index;
 
-   cl_git_pass(git_index_open(&index, TEST_INDEX2_PATH));
+   cl_git_pass(git_index__open(&index, TEST_INDEX2_PATH, GIT_OID_SHA1));
    cl_assert(index->on_disk);
 
    cl_assert(git_index_entrycount(index) == index_entry_count_2);
@@ -134,7 +134,7 @@ void test_index_tests__find_in_existing(void)
    git_index *index;
    unsigned int i;
 
-   cl_git_pass(git_index_open(&index, TEST_INDEX_PATH));
+   cl_git_pass(git_index__open(&index, TEST_INDEX_PATH, GIT_OID_SHA1));
 
    for (i = 0; i < ARRAY_SIZE(test_entries); ++i) {
 		size_t idx;
@@ -151,7 +151,7 @@ void test_index_tests__find_in_empty(void)
    git_index *index;
    unsigned int i;
 
-   cl_git_pass(git_index_open(&index, "fake-index"));
+   cl_git_pass(git_index__open(&index, "fake-index", GIT_OID_SHA1));
 
    for (i = 0; i < ARRAY_SIZE(test_entries); ++i) {
 		cl_assert(GIT_ENOTFOUND == git_index_find(NULL, index, test_entries[i].path));
@@ -166,7 +166,7 @@ void test_index_tests__find_prefix(void)
    const git_index_entry *entry;
    size_t pos;
 
-   cl_git_pass(git_index_open(&index, TEST_INDEX_PATH));
+   cl_git_pass(git_index__open(&index, TEST_INDEX_PATH, GIT_OID_SHA1));
 
    cl_git_pass(git_index_find_prefix(&pos, index, "src"));
    entry = git_index_get_byindex(index, pos);
@@ -187,7 +187,7 @@ void test_index_tests__write(void)
 
    copy_file(TEST_INDEXBIG_PATH, "index_rewrite");
 
-   cl_git_pass(git_index_open(&index, "index_rewrite"));
+   cl_git_pass(git_index__open(&index, "index_rewrite", GIT_OID_SHA1));
    cl_assert(index->on_disk);
 
    cl_git_pass(git_index_write(index));
@@ -218,7 +218,7 @@ void test_index_tests__sort1(void)
    /* sort the entries in an empty index */
    git_index *index;
 
-   cl_git_pass(git_index_open(&index, "fake-index"));
+   cl_git_pass(git_index__open(&index, "fake-index", GIT_OID_SHA1));
 
    /* FIXME: this test is slightly dumb */
    cl_assert(git_vector_is_sorted(&index->entries));
@@ -703,7 +703,7 @@ void test_index_tests__write_tree_invalid_unowned_index(void)
 	git_index_entry entry = {{0}};
 	git_oid tree_id;
 
-	cl_git_pass(git_index_new(&idx));
+	cl_git_pass(git_index__new(&idx, GIT_OID_SHA1));
 
 	cl_git_pass(git_oid__fromstr(&entry.id, "8312e0a89a9cbab77c732b6bc39b51a783e3a318", GIT_OID_SHA1));
 	entry.path = "foo";
@@ -966,7 +966,7 @@ void test_index_tests__reload_from_disk(void)
 	cl_git_pass(git_repository_index(&write_index, repo));
 	cl_assert_equal_i(false, write_index->on_disk);
 
-	cl_git_pass(git_index_open(&read_index, write_index->index_file_path));
+	cl_git_pass(git_index__open(&read_index, write_index->index_file_path, GIT_OID_SHA1));
 	cl_assert_equal_i(false, read_index->on_disk);
 
 	/* Stage two new files against the write_index */
@@ -1004,7 +1004,7 @@ void test_index_tests__corrupted_extension(void)
 {
 	git_index *index;
 
-	cl_git_fail_with(git_index_open(&index, TEST_INDEXBAD_PATH), GIT_ERROR);
+	cl_git_fail_with(git_index__open(&index, TEST_INDEXBAD_PATH, GIT_OID_SHA1), GIT_ERROR);
 }
 
 void test_index_tests__reload_while_ignoring_case(void)
@@ -1012,7 +1012,7 @@ void test_index_tests__reload_while_ignoring_case(void)
 	git_index *index;
 	unsigned int caps;
 
-	cl_git_pass(git_index_open(&index, TEST_INDEX_PATH));
+	cl_git_pass(git_index__open(&index, TEST_INDEX_PATH, GIT_OID_SHA1));
 	cl_git_pass(git_vector_verify_sorted(&index->entries));
 
 	caps = git_index_caps(index);
@@ -1037,7 +1037,7 @@ void test_index_tests__change_icase_on_instance(void)
 	unsigned int caps;
 	const git_index_entry *e;
 
-	cl_git_pass(git_index_open(&index, TEST_INDEX_PATH));
+	cl_git_pass(git_index__open(&index, TEST_INDEX_PATH, GIT_OID_SHA1));
 	cl_git_pass(git_vector_verify_sorted(&index->entries));
 
 	caps = git_index_caps(index);
@@ -1093,7 +1093,7 @@ void test_index_tests__can_iterate(void)
 	size_t i, iterator_idx = 0, found = 0;
 	int ret;
 
-	cl_git_pass(git_index_open(&index, TEST_INDEX_PATH));
+	cl_git_pass(git_index__open(&index, TEST_INDEX_PATH, GIT_OID_SHA1));
 	cl_git_pass(git_index_iterator_new(&iterator, index));
 
 	cl_assert(git_vector_is_sorted(&iterator->snap));
@@ -1136,7 +1136,7 @@ void test_index_tests__can_modify_while_iterating(void)
 	size_t expected = 0, seen = 0;
 	int ret;
 
-	cl_git_pass(git_index_open(&index, TEST_INDEX_PATH));
+	cl_git_pass(git_index__open(&index, TEST_INDEX_PATH, GIT_OID_SHA1));
 	cl_git_pass(git_index_iterator_new(&iterator, index));
 
 	expected = git_index_entrycount(index);

tests/libgit2/object/tree/update.c

@@ -1,5 +1,6 @@
 #include "clar_libgit2.h"
 #include "tree.h"
+#include "index.h"
 
 static git_repository *g_repo;
 
@@ -28,7 +29,7 @@ void test_object_tree_update__remove_blob(void)
 	cl_git_pass(git_tree_lookup(&base_tree, g_repo, &base_id));
 
 	/* Create it with an index */
-	cl_git_pass(git_index_new(&idx));
+	cl_git_pass(git_index__new(&idx, GIT_OID_SHA1));
 	cl_git_pass(git_index_read_tree(idx, base_tree));
 	cl_git_pass(git_index_remove(idx, path, 0));
 	cl_git_pass(git_index_write_tree_to(&tree_index_id, idx, g_repo));
@@ -57,7 +58,7 @@ void test_object_tree_update__remove_blob_deeper(void)
 	cl_git_pass(git_tree_lookup(&base_tree, g_repo, &base_id));
 
 	/* Create it with an index */
-	cl_git_pass(git_index_new(&idx));
+	cl_git_pass(git_index__new(&idx, GIT_OID_SHA1));
 	cl_git_pass(git_index_read_tree(idx, base_tree));
 	cl_git_pass(git_index_remove(idx, path, 0));
 	cl_git_pass(git_index_write_tree_to(&tree_index_id, idx, g_repo));
@@ -88,7 +89,7 @@ void test_object_tree_update__remove_all_entries(void)
 	cl_git_pass(git_tree_lookup(&base_tree, g_repo, &base_id));
 
 	/* Create it with an index */
-	cl_git_pass(git_index_new(&idx));
+	cl_git_pass(git_index__new(&idx, GIT_OID_SHA1));
 	cl_git_pass(git_index_read_tree(idx, base_tree));
 	cl_git_pass(git_index_remove(idx, path1, 0));
 	cl_git_pass(git_index_remove(idx, path2, 0));
@@ -119,7 +120,7 @@ void test_object_tree_update__replace_blob(void)
 	cl_git_pass(git_tree_lookup(&base_tree, g_repo, &base_id));
 
 	/* Create it with an index */
-	cl_git_pass(git_index_new(&idx));
+	cl_git_pass(git_index__new(&idx, GIT_OID_SHA1));
 	cl_git_pass(git_index_read_tree(idx, base_tree));
 
 	entry.path = path;
@@ -171,7 +172,7 @@ void test_object_tree_update__add_blobs(void)
 		int j;
 
 		/* Create it with an index */
-		cl_git_pass(git_index_new(&idx));
+		cl_git_pass(git_index__new(&idx, GIT_OID_SHA1));
 
 		base_tree = NULL;
 		if (i == 1) {
@@ -228,7 +229,7 @@ void test_object_tree_update__add_blobs_unsorted(void)
 		int j;
 
 		/* Create it with an index */
-		cl_git_pass(git_index_new(&idx));
+		cl_git_pass(git_index__new(&idx, GIT_OID_SHA1));
 
 		base_tree = NULL;
 		if (i == 1) {

tests/libgit2/repo/setters.c

@@ -1,6 +1,7 @@
 #include "clar_libgit2.h"
 #include "git2/sys/repository.h"
 
+#include "index.h"
 #include "odb.h"
 #include "posix.h"
 #include "util.h"
@@ -70,7 +71,7 @@ void test_repo_setters__setting_a_new_index_on_a_repo_which_has_already_loaded_o
 {
 	git_index *new_index;
 
-	cl_git_pass(git_index_open(&new_index, "./my-index"));
+	cl_git_pass(git_index__open(&new_index, "./my-index", GIT_OID_SHA1));
 	cl_assert(((git_refcount *)new_index)->refcount.val == 1);
 
 	git_repository_set_index(repo, new_index);

tests/libgit2/reset/hard.c

@@ -3,6 +3,7 @@
 #include "reset_helpers.h"
 #include "path.h"
 #include "futils.h"
+#include "index.h"
 
 static git_repository *repo;
 static git_object *target;
@@ -252,7 +253,7 @@ void test_reset_hard__switch_file_to_dir(void)
 	git_odb_free(odb);
 
 	entry.mode = GIT_FILEMODE_BLOB;
-	cl_git_pass(git_index_new(&idx));
+	cl_git_pass(git_index__new(&idx, GIT_OID_SHA1));
 	cl_git_pass(git_signature_now(&sig, "foo", "bar"));
 
 	/* Create the old tree */

tests/libgit2/status/worktree_init.c

@@ -7,6 +7,7 @@
 #include "posix.h"
 #include "util.h"
 #include "path.h"
+#include "index.h"
 
 static void cleanup_new_repo(void *path)
 {
@@ -65,7 +66,7 @@ void test_status_worktree_init__status_file_without_index_or_workdir(void)
 	cl_git_pass(git_repository_open(&repo, cl_fixture("testrepo.git")));
 	cl_git_pass(git_repository_set_workdir(repo, "wd", false));
 
-	cl_git_pass(git_index_open(&index, "empty-index"));
+	cl_git_pass(git_index__open(&index, "empty-index", GIT_OID_SHA1));
 	cl_assert_equal_i(0, (int)git_index_entrycount(index));
 	git_repository_set_index(repo, index);
 
@@ -106,7 +107,7 @@ void test_status_worktree_init__status_file_with_clean_index_and_empty_workdir(v
 	cl_git_pass(git_repository_open(&repo, cl_fixture("testrepo.git")));
 	cl_git_pass(git_repository_set_workdir(repo, "wd", false));
 
-	cl_git_pass(git_index_open(&index, "my-index"));
+	cl_git_pass(git_index__open(&index, "my-index", GIT_OID_SHA1));
 	fill_index_wth_head_entries(repo, index);
 
 	git_repository_set_index(repo, index);
@@ -283,7 +284,7 @@ void test_status_worktree_init__disable_pathspec_match(void)
 {
 	git_repository *repo;
 	git_status_options opts = GIT_STATUS_OPTIONS_INIT;
-	char *file_with_bracket = "LICENSE[1].md", 
+	char *file_with_bracket = "LICENSE[1].md",
 		*imaginary_file_with_bracket = "LICENSE[1-2].md";
 
 	cl_set_cleanup(&cleanup_new_repo, "pathspec");
@@ -291,18 +292,18 @@ void test_status_worktree_init__disable_pathspec_match(void)
 	cl_git_mkfile("pathspec/LICENSE[1].md", "screaming bracket\n");
 	cl_git_mkfile("pathspec/LICENSE1.md", "no bracket\n");
 
-	opts.flags = GIT_STATUS_OPT_INCLUDE_UNTRACKED | 
+	opts.flags = GIT_STATUS_OPT_INCLUDE_UNTRACKED |
 		GIT_STATUS_OPT_DISABLE_PATHSPEC_MATCH;
 	opts.pathspec.count = 1;
 	opts.pathspec.strings = &file_with_bracket;
 
 	cl_git_pass(
-		git_status_foreach_ext(repo, &opts, cb_status__expected_path, 
+		git_status_foreach_ext(repo, &opts, cb_status__expected_path,
 		file_with_bracket)
 	);
 
 	/* Test passing a pathspec matching files in the workdir. */
-	/* Must not match because pathspecs are disabled. */ 
+	/* Must not match because pathspecs are disabled. */
 	opts.pathspec.strings = &imaginary_file_with_bracket;
 	cl_git_pass(
 		git_status_foreach_ext(repo, &opts, cb_status__expected_path, NULL)

tests/libgit2/submodule/lookup.c

@@ -3,6 +3,7 @@
 #include "git2/sys/repository.h"
 #include "repository.h"
 #include "futils.h"
+#include "index.h"
 
 static git_repository *g_repo = NULL;
 
@@ -210,7 +211,7 @@ void test_submodule_lookup__lookup_even_with_missing_index(void)
 	git_index *idx;
 
 	/* give the repo an empty index */
-	cl_git_pass(git_index_new(&idx));
+	cl_git_pass(git_index__new(&idx, GIT_OID_SHA1));
 	git_repository_set_index(g_repo, idx);
 	git_index_free(idx);
 

tests/resources/testrepo_256/.gitted/HEAD

@@ -0,0 +1 @@
+ref: refs/heads/master

tests/resources/testrepo_256/.gitted/config

@@ -0,0 +1,15 @@
+[core]
+	repositoryformatversion = 1
+	filemode = true
+	bare = false
+	logallrefupdates = true
+	ignorecase = true
+	precomposeunicode = true
+[remote "origin"]
+	url = /Users/ethomson/Personal/Projects/libgit2/libgit2/tests/resources/testrepo_256.git
+	fetch = +refs/heads/*:refs/remotes/origin/*
+[extensions]
+	objectformat = sha256
+[branch "master"]
+	remote = origin
+	merge = refs/heads/master

tests/resources/testrepo_256/.gitted/description

@@ -0,0 +1 @@
+Unnamed repository; edit this file 'description' to name the repository.

tests/resources/testrepo_256/.gitted/info/exclude

@@ -0,0 +1,6 @@
+# git ls-files --others --exclude-from=.git/info/exclude
+# Lines that start with '#' are comments.
+# For a project mostly in C, the following would be a good set of
+# exclude patterns (uncomment them if you want to use them):
+# *.[oa]
+# *~

tests/resources/testrepo_256/.gitted/logs/HEAD

@@ -0,0 +1 @@
+0000000000000000000000000000000000000000000000000000000000000000 decaff3051968d1f3a2defd3d4a80ced03101555e1fd8913b3544026c0717d4f Edward Thomson <ethomson@vercel.com> 1680595792 +0100	clone: from /Users/ethomson/Personal/Projects/libgit2/libgit2/tests/resources/testrepo_256.git

tests/resources/testrepo_256/.gitted/logs/refs/heads/master

@@ -0,0 +1 @@
+0000000000000000000000000000000000000000000000000000000000000000 decaff3051968d1f3a2defd3d4a80ced03101555e1fd8913b3544026c0717d4f Edward Thomson <ethomson@vercel.com> 1680595792 +0100	clone: from /Users/ethomson/Personal/Projects/libgit2/libgit2/tests/resources/testrepo_256.git

tests/resources/testrepo_256/.gitted/logs/refs/remotes/origin/HEAD

@@ -0,0 +1 @@
+0000000000000000000000000000000000000000000000000000000000000000 decaff3051968d1f3a2defd3d4a80ced03101555e1fd8913b3544026c0717d4f Edward Thomson <ethomson@vercel.com> 1680595792 +0100	clone: from /Users/ethomson/Personal/Projects/libgit2/libgit2/tests/resources/testrepo_256.git

tests/resources/testrepo_256/.gitted/objects/01/18010feb81fe41b9df646d13866742a9070b56fd0ba9ab8dff828fc36c1f78

@@ -0,0 +1 @@
+x
<01><>[NÅ0ùî*ü<>t•8§B°”Øq ¢iPš»º~Gg<47>42zoœ±/kªÂ^rfK‚¡FO%BI"Nª<4E>ÉdwVe¡b8º”vb<16>‘·ß<õ\°LçB6İk<	ÅUtœÅ–¢%¦ÄÈÅYÿ#Sµ<53>ÔCè·ü\ßcÂù<<3C>5~ô„7í:›<ªÎ<C2AA>¯<EFBFBD>¯<EFBFBD>Ûñ<C39B>ÑßÁ:›n3&‚WƒÆl7½£–şSß>K<>kt…Ú½ <C2BD>kÀõäҦʳéµı
<01>÷_‘

tests/resources/testrepo_256/.gitted/objects/14/bd335f9d7188c778d44eba8801fe9bda46b66593291f5b9f7cd5f8888af12f

@@ -0,0 +1 @@
+x

̱ƒ0ÐÔžÂ#ÈB k„¾¹ä‘j²}(^ûrÝ«Ùãô¶¬²„i3ÏÃg¾’õ _ÜœÝ8H§Ö<C2A7><C396>¡N]	“Š”ü}P·ó8žYò®o;¾o\Wùw× 

tests/resources/testrepo_256/.gitted/objects/34/f79ad1c813b93d2ee11c830c2134815a31d9629e6aa9773338fedaab90976b

@@ -0,0 +1 @@
+x
ÌM‚0†a×=Å\@3ÃôcŒWнi;-`,ooq÷~‹ï)¾²æ°„WŠ$EŸ3£¡Î¶B™}#)‹ö-Æ$È„dŒI”¥íˆ­±±9ÑY•ï;A\¦i,ªT{ð«<kì£O+ÜÒ÷²ú-À9|þqíÇ2láT_ fëlƒ®…#:D¥UYfØ<66>Ám4

tests/resources/testrepo_256/.gitted/objects/43/e084a4599ca42c476919917e3db8fde0045ee66305fd5e634b0c793c536a1b

@@ -0,0 +1 @@
+x
<01><>Qj!Dóí)ú	ÚÚ¶Â{„œ m53<35>Y—‰¹ÿÊæù((ªx¥ã8ö	Èô2ÏÖ€}	Ýë’KØ¢¦ZQs’VP99GɧƑ}Å#yËÊ.&ê¥S‰æ.g»MЂ‹guÔë“ÆHZ#ºN‚˜´x_5—1'«0jÏRPÂêr·F~ç6NøÔ1'\7ÑqƒË<C692>>ÍÇ×!û÷›Žãr`t¼Z¶Ö¬t=ší?¬˜Û~Vø1ÅfTÂ

tests/resources/testrepo_256/.gitted/objects/5c/a8959deb2b8327458e0344523eb1ddeeef4bce03e35864640b452f84d26848

@@ -0,0 +1 @@
+x
²░1N1E╘ВНR│фЖьKяPрq
оx°█■]ё█#╝▐Sp
╨╞'ЩВ╔/}ш.цЬД÷ф║j\Е1▀KRP─8RDIm╙P ╨л!╢┬D>⌠pхмЗ╕Л [╬к║Ш0╣╨Ю╣∙╛⌡D	┌╦▄┌hКSf!┐▀ ыф@╘И╣-ЭyюZS>╘╒Е\Гn╛жS▄	]и░─Cl╦ДбT[#GM|ш-Е>ж~≤▐ЗS▌j╬ж╬щЗn^uрGz?_фzГИш⌡╠.y≈,b0оSк╓С²║ЪМ/÷z°уПQvYмИvГги╥⌠╧Лё⌡~╜к/(jrS

tests/resources/testrepo_256/.gitted/objects/5d/bb1fff5c0094b31b25b4635ab9fbee66d65fe5dda47dd0ac5f01dd69a84c6f

@@ -0,0 +1,3 @@
+x
u<>Kj1D³<44>Sτ¤–άκ†!'H. O<C2A0>gΐ3
+²<EFBFBD>―9Ι6»Ά¨χ rέ¶µ2>υ¦
+d=‹<>²³³-b<>5μ‹“dςΕ•Δ„¦P<10>ξ(DΑe<CE91>Ι{<7B>ι+6έ;Μ>±‹4KΖΔ†­¦rLf<4C>
&#9Α,φΏέo}©
>rνή–<CEAE>λ/ΧόNη-®—η\·W°<[Ηβα`‚1ΣhΗ£®
ήΛ=¶<02>Kέ®Z‡ρ‘Nηµ/·τΗ{"‚ο?¥χΌΐ―κ®Σ7bΖW

tests/resources/testrepo_256/.gitted/objects/7e/9424c06052ca33bfc599bccadee60065d8664a9af7648a1455100c4f772e1c

@@ -0,0 +1,2 @@
+x
<01>ÏAj1…á®çÚ‚-i,B(]µ(tiÙ2’™	ƒ=~]zƒnÿÅ÷xe_×¥Æù©f]òb¨µ…$Öa­9)yI
Ù'ñ‚2i«èæYÉÇTU[f™îù°­ƒWVaÔ©5sùu,QãÜ
+¢¤€¤:„P’OœCp*£ä)?ú×~Àùó
'x]6x˹\­^àÜöýžóz¿Ù©ìë<!űÆÏÎ;7<>:nuû70½oK_ò
þ¤égƒV

tests/resources/testrepo_256/.gitted/objects/80/91b686de8bf697ef632dda9b3179f2419717275e3bfd2055b303489dbbfa47

@@ -0,0 +1 @@
+x
+)JMU01c040031QrutñueX·hîaÖ+|fºŸbìï½
eú¶±i=ãö^Í*×ÉÆG
êOæ

tests/resources/testrepo_256/.gitted/objects/90/1505c3355518bee35475c5d3f23bac1dded688b2bd314cc32b7f157e100724

@@ -0,0 +1 @@
+x
<01><>QJ1„}î)z
¥M›¦<E280BA><‚'HÓÔýÁÝÊZïï¢7ðm˜ùf`tîû}y ú°N3?RÌÈ6§BŠY¹wÈJeH‰R(…
LÐM¬•Ì<E280A2>‰±€û”ÓŽåµA#<23>8z½€‚ÚÄ<>Pµ¥ÔµæÈÀ5¨d(:XH¾2ÁÉ÷Úæéßt®å_7ÑyøÛ—þŠ—÷]îO:÷g<1F>r<EFBFBD>©rö<72><C3B6>Bp—{=ZöŸ®k§ºù¿
?s?T¬U…

tests/resources/testrepo_256/.gitted/objects/9d/aab17c25f647d652c72c8cc3cf4602c270a369beebc7d0b67238897bbc426b

@@ -0,0 +1 @@
+x
+)JMU0´°d040031Qrutñue0~"ºÃtYÁî›2¾_,Ækxö꺤ÏÏøtßjÖsFŸO+L€@!1‰A¹+@æ£s¾¾JÇ<>>‘õIÞêÏ]³äœ¾àWÖÞµS¹ Æ&%æ%għeæ¤ê•T”0L;ØÏ4ýq/ã—M·ÎÞ[¢:ëU¶fâk¥½:<ö	šÌ®Pmy©å`å¹ñ—&îæOwñ›¹ÚS_úãŸû±§8omòùlø PpËùƒ‹
¨TO

tests/resources/testrepo_256/.gitted/objects/b2/1c8c27a05a3f0bf9f0f44ebf05e11d9c591b04cfdaff7cc860310356d71827

@@ -0,0 +1 @@
+x
u<>Qj1DûíSè)²WëÕB)<29>д°e%^¨×Åqèõë´ýÍß0Ì{0RKÙ:8vO½©‚å³µleåà–e<E28093>1ršEO³LŽ0aò8?Ú™¯ÐtBŠäBÒàÉG'Q**MYÉŸ'áhY…íL¸õ\¼KíN9HÝáå*¿áx)aû|–Z^Áº…ØN¼pA4£<1D>º6xKß¡%øȵ\ï´ã=/[Ï·øÏ“÷¼zD7x¼‰-ì’áÏuWó¯W<>

tests/resources/testrepo_256/.gitted/objects/c2/58f010a08328a29cde33411d955520e0375fcbbcc14b7636a70f7536c32ef6

@@ -0,0 +1,2 @@
+x
ŚÁ‚0D=÷+önbvK[JbŚ?ŕÍxßÖĄ˘Ö<>/<2F>™I^ćđ”P»1=%+X’5IśO6“´uĂ	=V•“*pDňě]h±v<C2B1>„ťG/„÷HÜ,o ŁżŹ€r1Ë@eÖŠLpë˛
+ž´<C5BE>Łň0ľľçŇs÷>ä±?
ŮHľŽÎ!ěŃ"s}t3,ĺÍłI˙mř3‘

tests/resources/testrepo_256/.gitted/objects/cf/84e5be57f8d5d51f136d3d137b654c602721c469c1b0a58e7e95647a9cf1c0

@@ -0,0 +1,3 @@
+x
•ŽA
+Â0E]ç³ëB<C3AB>Ì$©
ˆx¯ ™dª…ÆHŒ ·7xWÞãÃ<C3A3>%ç¥
‘Þ´*<Æ}À“qVˆœ
ÖZFŠ‰P‹'q/yŽ§(–ÙšQÏèUxµ[©Ö%
+~8É;äÇ*»XòИ‰¼vä`«QkÕm¿Ð䯑:—&O)IþÀp]ÚåÞÝ%V	M˜kÉ°.Ü©/××Eÿ

tests/resources/testrepo_256/.gitted/objects/d8/8b60d2641df3656381dc8e201abb820a414de03eb63c065b06a2ab37d3f5ca

@@ -0,0 +1 @@
+x
5ÌÁjÃ0€á<E282AC>ýêyP”ÈŽ(£ÐëÖW²#‡´q4Rõ°·_/=þ|ðÏÐôǦ›d"ñMH=î"¦2åØ¡FOÄsšÚÉû.¥ëK;â<>%bãsi¹wö÷+<2B>VMÎ^gÞ656™ÆW<C386>¦ã[fÙa{®«é]68I•}ÉÇ"{åÇy®¼¬Ç¬õ"Š}ð‰-¢sߪwøá\.Zëb÷<0F>Ø=B