From: brian m. carlson Date: Tue, 1 Jul 2025 21:22:27 +0000 (+0000) Subject: hash: add a constant for the default hash algorithm X-Git-Tag: v2.51.0-rc0~56^2~10 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ca6daa1368eb9b0b48f64ef57907821318d7971c;p=thirdparty%2Fgit.git hash: add a constant for the default hash algorithm Right now, SHA-1 is the default hash algorithm in Git. However, this may change in the future. We have many places in our code that use the SHA-1 constant to indicate the default hash if none is specified, but it will end up being more practical to specify this explicitly and clearly using a constant for whatever the default hash algorithm is. Then, if we decide to change it in the future, we can simply replace the constant representing the default with a new value. For these reasons, introduce GIT_HASH_DEFAULT to represent the default hash algorithm. Signed-off-by: brian m. carlson Signed-off-by: Junio C Hamano --- diff --git a/hash.h b/hash.h index d6422ddf45..0d3d85e04c 100644 --- a/hash.h +++ b/hash.h @@ -174,6 +174,8 @@ static inline void git_SHA256_Clone(git_SHA256_CTX *dst, const git_SHA256_CTX *s #define GIT_HASH_SHA256 2 /* Number of algorithms supported (including unknown). */ #define GIT_HASH_NALGOS (GIT_HASH_SHA256 + 1) +/* Default hash algorithm if unspecified. */ +#define GIT_HASH_DEFAULT GIT_HASH_SHA1 /* "sha1", big-endian */ #define GIT_SHA1_FORMAT_ID 0x73686131