Merge branch 'bc/sha-256-part-3'

The final leg of SHA-256 transition.

* bc/sha-256-part-3: (39 commits)
  t: remove test_oid_init in tests
  docs: add documentation for extensions.objectFormat
  ci: run tests with SHA-256
  t: make SHA1 prerequisite depend on default hash
  t: allow testing different hash algorithms via environment
  t: add test_oid option to select hash algorithm
  repository: enable SHA-256 support by default
  setup: add support for reading extensions.objectformat
  bundle: add new version for use with SHA-256
  builtin/verify-pack: implement an --object-format option
  http-fetch: set up git directory before parsing pack hashes
  t0410: mark test with SHA1 prerequisite
  t5308: make test work with SHA-256
  t9700: make hash size independent
  t9500: ensure that algorithm info is preserved in config
  t9350: make hash size independent
  t9301: make hash size independent
  t9300: use $ZERO_OID instead of hard-coded object ID
  t9300: abstract away SHA-1-specific constants
  t8011: make hash size independent
  ...

1 files changed, 10 insertions, 1 deletions

diff --git a/setup.c b/setup.c
index 78e7ae1be7..c04cd25a30 100644
--- a/setup.c
+++ b/setup.c
@@ -490,8 +490,17 @@ static enum extension_result handle_extension(const char *var,
 {
 	if (!strcmp(ext, "noop-v1")) {
 		return EXTENSION_OK;
-	}
+	} else if (!strcmp(ext, "objectformat")) {
+		int format;
 
+		if (!value)
+			return config_error_nonbool(var);
+		format = hash_algo_by_name(value);
+		if (format == GIT_HASH_UNKNOWN)
+			return error("invalid value for 'extensions.objectformat'");
+		data->hash_algo = format;
+		return EXTENSION_OK;
+	}
 	return EXTENSION_UNKNOWN;
 }