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connect: add function to detect supported v1 hash functions 

Add a function, server_supports_hash, to see if the remote server
supports a particular hash algorithm when speaking protocol v1.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
brian m. carlson 2020-05-25 19:58:56 +00:00 committed by Junio C Hamano
parent 7c97af4d64
commit 122037c2ed
2 changed files with 23 additions and 0 deletions
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22
connect.c
View File

@ -511,6 +511,28 @@ static const char *parse_feature_value(const char *feature_list, const char *fea
return NULL;
}
int server_supports_hash(const char *desired, int *feature_supported)
{
int offset = 0;
int len;
const char *hash;
hash = next_server_feature_value("object-format", &len, &offset);
if (feature_supported)
*feature_supported = !!hash;
if (!hash) {
hash = hash_algos[GIT_HASH_SHA1].name;
len = strlen(hash);
}
while (hash) {
if (!xstrncmpz(desired, hash, len))
return 1;
hash = next_server_feature_value("object-format", &len, &offset);
}
return 0;
}
int parse_feature_request(const char *feature_list, const char *feature)
{
return !!parse_feature_value(feature_list, feature, NULL, NULL);

1
connect.h
View File

@ -18,6 +18,7 @@ int url_is_local_not_ssh(const char *url);
struct packet_reader;
enum protocol_version discover_version(struct packet_reader *reader);
int server_supports_hash(const char *desired, int *feature_supported);
int server_supports_v2(const char *c, int die_on_error);
int server_feature_v2(const char *c, const char **v);
int server_supports_feature(const char *c, const char *feature,