[PATCH v2 10/11] help: add a build option for default hash

From: brian m. carlson <sandals@crustytoothpaste.net>
Date: Jul 1, 2025, 21:22 UTC
Message-ID: <20250701212237.766774-11-sandals@crustytoothpaste.net>
In-Reply-To: <20250701212237.766774-1-sandals@crustytoothpaste.net>

We'd like users to be able to determine the hash algorithm that is the builtin default in their version of Git. This is useful for troubleshooting, especially when we decide to change the default. Add an entry for the default hash in the output of git version --build-options so that users can easily access that information and include it in bug reports.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
---
 help.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/help.c b/help.c
index 21b778707a..bd0be2ee57 100644
--- a/help.c
+++ b/help.c
@@ -810,6 +810,7 @@ void get_version_info(struct strbuf *buf, int show_build_options)
 			    SHA1_UNSAFE_BACKEND);
 #endif
 		strbuf_addf(buf, "SHA-256: %s\n", SHA256_BACKEND);
+		strbuf_addf(buf, "default-hash: %s\n", hash_algos[GIT_HASH_DEFAULT].name);
 	}
 }