sha256: indirection for experimental functions

The experimental function signature is only available when
`GIT_EXPERIMENTAL_SHA256` is enabled.

Author: ethomson

examples/general.c

@@ -142,7 +142,11 @@ static void oid_parsing(git_oid *oid)
 	 * this throughout the example for storing the value of the current SHA
 	 * key we're working with.
 	 */
+#ifdef GIT_EXPERIMENTAL_SHA256
 	git_oid_fromstr(oid, hex, GIT_OID_SHA1);
+#else
+	git_oid_fromstr(oid, hex);
+#endif
 
 	/*
 	 * Once we've converted the string into the oid value, we can get the raw
@@ -287,9 +291,14 @@ static void commit_writing(git_repository *repo)
 	 * parents.  Here we're creating oid objects to create the commit with,
 	 * but you can also use
 	 */
+#ifdef GIT_EXPERIMENTAL_SHA256
 	git_oid_fromstr(&tree_id, "f60079018b664e4e79329a7ef9559c8d9e0378d1", GIT_OID_SHA1);
-	git_tree_lookup(&tree, repo, &tree_id);
 	git_oid_fromstr(&parent_id, "5b5b025afb0b4c913b4c338a42934a3863bf3644", GIT_OID_SHA1);
+#else
+	git_oid_fromstr(&tree_id, "f60079018b664e4e79329a7ef9559c8d9e0378d1");
+	git_oid_fromstr(&parent_id, "5b5b025afb0b4c913b4c338a42934a3863bf3644");
+#endif
+	git_tree_lookup(&tree, repo, &tree_id);
 	git_commit_lookup(&parent, repo, &parent_id);
 
 	/**
@@ -353,7 +362,11 @@ static void commit_parsing(git_repository *repo)
 
 	printf("\n*Commit Parsing*\n");
 
+#ifdef GIT_EXPERIMENTAL_SHA256
 	git_oid_fromstr(&oid, "8496071c1b46c854b31185ea97743be6a8774479", GIT_OID_SHA1);
+#else
+	git_oid_fromstr(&oid, "8496071c1b46c854b31185ea97743be6a8774479");
+#endif
 
 	error = git_commit_lookup(&commit, repo, &oid);
 	check_error(error, "looking up commit");
@@ -422,7 +435,11 @@ static void tag_parsing(git_repository *repo)
 	 * We create an oid for the tag object if we know the SHA and look it up
 	 * the same way that we would a commit (or any other object).
 	 */
+#ifdef GIT_EXPERIMENTAL_SHA256
 	git_oid_fromstr(&oid, "b25fa35b38051e4ae45d4222e795f9df2e43f1d1", GIT_OID_SHA1);
+#else
+	git_oid_fromstr(&oid, "b25fa35b38051e4ae45d4222e795f9df2e43f1d1");
+#endif
 
 	error = git_tag_lookup(&tag, repo, &oid);
 	check_error(error, "looking up tag");
@@ -470,7 +487,11 @@ static void tree_parsing(git_repository *repo)
 	/**
 	 * Create the oid and lookup the tree object just like the other objects.
 	 */
+#ifdef GIT_EXPERIMENTAL_SHA256
 	git_oid_fromstr(&oid, "f60079018b664e4e79329a7ef9559c8d9e0378d1", GIT_OID_SHA1);
+#else
+	git_oid_fromstr(&oid, "f60079018b664e4e79329a7ef9559c8d9e0378d1");
+#endif
 	git_tree_lookup(&tree, repo, &oid);
 
 	/**
@@ -524,7 +545,11 @@ static void blob_parsing(git_repository *repo)
 
 	printf("\n*Blob Parsing*\n");
 
+#ifdef GIT_EXPERIMENTAL_SHA256
 	git_oid_fromstr(&oid, "1385f264afb75a56a5bec74243be9b367ba4ca08", GIT_OID_SHA1);
+#else
+	git_oid_fromstr(&oid, "1385f264afb75a56a5bec74243be9b367ba4ca08");
+#endif
 	git_blob_lookup(&blob, repo, &oid);
 
 	/**
@@ -566,7 +591,11 @@ static void revwalking(git_repository *repo)
 
 	printf("\n*Revwalking*\n");
 
+#ifdef GIT_EXPERIMENTAL_SHA256
 	git_oid_fromstr(&oid, "5b5b025afb0b4c913b4c338a42934a3863bf3644", GIT_OID_SHA1);
+#else
+	git_oid_fromstr(&oid, "5b5b025afb0b4c913b4c338a42934a3863bf3644");
+#endif
 
 	/**
 	 * To use the revwalker, create a new walker, tell it how you want to sort

examples/rev-list.c

@@ -140,8 +140,14 @@ static int revwalk_parse_revs(git_repository *repo, git_revwalk *walk, struct ar
 			if (push_spec(repo, walk, curr, hide) == 0)
 				continue;
 
+#ifdef GIT_EXPERIMENTAL_SHA256
 			if ((error = git_oid_fromstr(&oid, curr, GIT_OID_SHA1)))
 				return error;
+#else
+			if ((error = git_oid_fromstr(&oid, curr)))
+				return error;
+#endif
+
 			if ((error = push_commit(walk, &oid, hide)))
 				return error;
 		}

fuzzers/packfile_fuzzer.c

@@ -36,10 +36,19 @@ int LLVMFuzzerInitialize(int *argc, char ***argv)
 		fprintf(stderr, "Failed to limit maximum pack object count\n");
 		abort();
 	}
+
+#ifdef GIT_EXPERIMENTAL_SHA256
 	if (git_odb_new(&odb, NULL) < 0) {
 		fprintf(stderr, "Failed to create the odb\n");
 		abort();
 	}
+#else
+	if (git_odb_new(&odb) < 0) {
+		fprintf(stderr, "Failed to create the odb\n");
+		abort();
+	}
+#endif
+
 	if (git_mempack_new(&mempack) < 0) {
 		fprintf(stderr, "Failed to create the mempack\n");
 		abort();
@@ -90,10 +99,18 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
 	if (git_indexer_append(indexer, data, size, &stats) < 0)
 		goto cleanup;
 	if (append_hash) {
+#ifdef GIT_EXPERIMENTAL_SHA256
 		if (git_odb_hash(&oid, data, size, GIT_OBJECT_BLOB, GIT_OID_SHA1) < 0) {
 			fprintf(stderr, "Failed to compute the SHA1 hash\n");
 			abort();
 		}
+#else
+		if (git_odb_hash(&oid, data, size, GIT_OBJECT_BLOB) < 0) {
+			fprintf(stderr, "Failed to compute the SHA1 hash\n");
+			abort();
+		}
+#endif
+
 		if (git_indexer_append(indexer, &oid.id, GIT_OID_SHA1_SIZE, &stats) < 0) {
 			goto cleanup;
 		}

include/git2/odb.h

@@ -68,7 +68,11 @@ typedef struct {
  * @param opts the options for this object database or NULL for defaults
  * @return 0 or an error code
  */
+#ifdef GIT_EXPERIMENTAL_SHA256
 GIT_EXTERN(int) git_odb_new(git_odb **out, const git_odb_options *opts);
+#else
+GIT_EXTERN(int) git_odb_new(git_odb **out);
+#endif
 
 /**
  * Create a new object database and automatically add
@@ -87,10 +91,14 @@ GIT_EXTERN(int) git_odb_new(git_odb **out, const git_odb_options *opts);
  * @param opts the options for this object database or NULL for defaults
  * @return 0 or an error code
  */
+#ifdef GIT_EXPERIMENTAL_SHA256
 GIT_EXTERN(int) git_odb_open(
 	git_odb **out,
 	const char *objects_dir,
 	const git_odb_options *opts);
+#else
+GIT_EXTERN(int) git_odb_open(git_odb **out, const char *objects_dir);
+#endif
 
 /**
  * Add an on-disk alternate to an existing Object DB.
@@ -471,12 +479,16 @@ GIT_EXTERN(int) git_odb_write_multi_pack_index(
  * @param oid_type the oid type to hash to
  * @return 0 or an error code
  */
+#ifdef GIT_EXPERIMENTAL_SHA256
 GIT_EXTERN(int) git_odb_hash(
 	git_oid *out,
 	const void *data,
 	size_t len,
 	git_object_t object_type,
 	git_oid_t oid_type);
+#else
+GIT_EXTERN(int) git_odb_hash(git_oid *out, const void *data, size_t len, git_object_t type);
+#endif
 
 /**
  * Read a file from disk and fill a git_oid with the object id
@@ -492,11 +504,15 @@ GIT_EXTERN(int) git_odb_hash(
  * @param oid_type the oid type to hash to
  * @return 0 or an error code
  */
+#ifdef GIT_EXPERIMENTAL_SHA256
 GIT_EXTERN(int) git_odb_hashfile(
 	git_oid *out,
 	const char *path,
 	git_object_t object_type,
 	git_oid_t oid_type);
+#else
+GIT_EXTERN(int) git_odb_hashfile(git_oid *out, const char *path, git_object_t type);
+#endif
 
 /**
  * Create a copy of an odb_object

include/git2/odb_backend.h

@@ -85,10 +85,20 @@ typedef struct {
  *
  * @return 0 or an error code
  */
+#ifdef GIT_EXPERIMENTAL_SHA256
 GIT_EXTERN(int) git_odb_backend_loose(
 	git_odb_backend **out,
 	const char *objects_dir,
 	git_odb_backend_loose_options *opts);
+#else
+GIT_EXTERN(int) git_odb_backend_loose(
+	git_odb_backend **out,
+	const char *objects_dir,
+	int compression_level,
+	int do_fsync,
+	unsigned int dir_mode,
+	unsigned int file_mode);
+#endif
 
 /**
  * Create a backend out of a single packfile

include/git2/oid.h

@@ -122,7 +122,11 @@ typedef struct git_oid {
  * @param type the type of object id
  * @return 0 or an error code
  */
+#ifdef GIT_EXPERIMENTAL_SHA256
 GIT_EXTERN(int) git_oid_fromstr(git_oid *out, const char *str, git_oid_t type);
+#else
+GIT_EXTERN(int) git_oid_fromstr(git_oid *out, const char *str);
+#endif
 
 /**
  * Parse a hex formatted NUL-terminated string into a git_oid.
@@ -132,7 +136,11 @@ GIT_EXTERN(int) git_oid_fromstr(git_oid *out, const char *str, git_oid_t type);
  * @param type the type of object id
  * @return 0 or an error code
  */
+#ifdef GIT_EXPERIMENTAL_SHA256
 GIT_EXTERN(int) git_oid_fromstrp(git_oid *out, const char *str, git_oid_t type);
+#else
+GIT_EXTERN(int) git_oid_fromstrp(git_oid *out, const char *str);
+#endif
 
 /**
  * Parse N characters of a hex formatted object id into a git_oid.
@@ -146,7 +154,11 @@ GIT_EXTERN(int) git_oid_fromstrp(git_oid *out, const char *str, git_oid_t type);
  * @param type the type of object id
  * @return 0 or an error code
  */
+#ifdef GIT_EXPERIMENTAL_SHA256
 GIT_EXTERN(int) git_oid_fromstrn(git_oid *out, const char *str, size_t length, git_oid_t type);
+#else
+GIT_EXTERN(int) git_oid_fromstrn(git_oid *out, const char *str, size_t length);
+#endif
 
 /**
  * Copy an already raw oid into a git_oid structure.
@@ -155,7 +167,11 @@ GIT_EXTERN(int) git_oid_fromstrn(git_oid *out, const char *str, size_t length, g
  * @param raw the raw input bytes to be copied.
  * @return 0 on success or error code
  */
+#ifdef GIT_EXPERIMENTAL_SHA256
 GIT_EXTERN(int) git_oid_fromraw(git_oid *out, const unsigned char *raw, git_oid_t type);
+#else
+GIT_EXTERN(int) git_oid_fromraw(git_oid *out, const unsigned char *raw);
+#endif
 
 /**
  * Format a git_oid into a hex string.

src/cli/cmd_hash_object.c

@@ -64,8 +64,13 @@ static int hash_buf(git_odb *odb, git_str *buf, git_object_t type)
 		if (git_odb_write(&oid, odb, buf->ptr, buf->size, type) < 0)
 			return cli_error_git();
 	} else {
+#ifdef GIT_EXPERIMENTAL_SHA256
 		if (git_odb_hash(&oid, buf->ptr, buf->size, type, GIT_OID_SHA1) < 0)
 			return cli_error_git();
+#else
+		if (git_odb_hash(&oid, buf->ptr, buf->size, type) < 0)
+			return cli_error_git();
+#endif
 	}
 
 	if (printf("%s\n", git_oid_tostr_s(&oid)) < 0)

src/libgit2/commit_graph.c

@@ -437,7 +437,7 @@ static int git_commit_graph_entry_get_byindex(
 	}
 
 	commit_data = file->commit_data + pos * (GIT_OID_SHA1_SIZE + 4 * sizeof(uint32_t));
-	git_oid_fromraw(&e->tree_oid, commit_data, GIT_OID_SHA1);
+	git_oid__fromraw(&e->tree_oid, commit_data, GIT_OID_SHA1);
 	e->parent_indices[0] = ntohl(*((uint32_t *)(commit_data + GIT_OID_SHA1_SIZE)));
 	e->parent_indices[1] = ntohl(
 			*((uint32_t *)(commit_data + GIT_OID_SHA1_SIZE + sizeof(uint32_t))));
@@ -471,7 +471,7 @@ static int git_commit_graph_entry_get_byindex(
 		}
 	}
 
-	git_oid_fromraw(&e->sha1, &file->oid_lookup[pos * GIT_OID_SHA1_SIZE], GIT_OID_SHA1);
+	git_oid__fromraw(&e->sha1, &file->oid_lookup[pos * GIT_OID_SHA1_SIZE], GIT_OID_SHA1);
 	return 0;
 }
 

src/libgit2/diff_file.c

@@ -162,7 +162,7 @@ int git_diff_file_content__init_from_src(
 			fc->flags |= GIT_DIFF_FLAG__FREE_BLOB;
 		} else {
 			int error;
-			if ((error = git_odb_hash(&fc->file->id, src->buf, src->buflen, GIT_OBJECT_BLOB, GIT_OID_SHA1)) < 0)
+			if ((error = git_odb__hash(&fc->file->id, src->buf, src->buflen, GIT_OBJECT_BLOB, GIT_OID_SHA1)) < 0)
 				return error;
 			fc->file->size = src->buflen;
 			fc->file->id_abbrev = GIT_OID_SHA1_HEXSIZE;
@@ -411,7 +411,7 @@ static int diff_file_content_load_workdir(
 
 	/* once data is loaded, update OID if we didn't have it previously */
 	if (!error && (fc->file->flags & GIT_DIFF_FLAG_VALID_ID) == 0) {
-		error = git_odb_hash(
+		error = git_odb__hash(
 			&fc->file->id, fc->map.data, fc->map.len,
 			GIT_OBJECT_BLOB, GIT_OID_SHA1);
 		fc->file->flags |= GIT_DIFF_FLAG_VALID_ID;

src/libgit2/fetch.c

@@ -13,6 +13,7 @@
 #include "git2/transport.h"
 #include "git2/sys/remote.h"
 
+#include "oid.h"
 #include "remote.h"
 #include "refspec.h"
 #include "pack.h"
@@ -75,7 +76,7 @@ static int maybe_want_oid(git_remote *remote, git_refspec *spec)
 	oid_head = git__calloc(1, sizeof(git_remote_head));
 	GIT_ERROR_CHECK_ALLOC(oid_head);
 
-	git_oid_fromstr(&oid_head->oid, spec->src, GIT_OID_SHA1);
+	git_oid__fromstr(&oid_head->oid, spec->src, GIT_OID_SHA1);
 
 	if (spec->dst) {
 		oid_head->name = git__strdup(spec->dst);