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 <sandals@xxxxxxxxxxxxxxxxxxxx> --- hash.h | 2 ++ 1 file changed, 2 insertions(+) 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
