1#ifndef TRANSPORT_INTERNAL_H 2#define TRANSPORT_INTERNAL_H 3 4struct ref; 5struct transport; 6struct argv_array; 7 8struct transport_vtable { 9 /** 10 * This transport supports the fetch() function being called 11 * without get_refs_list() first being called. 12 */ 13 unsigned fetch_without_list : 1; 14 15 /** 16 * Returns 0 if successful, positive if the option is not 17 * recognized or is inapplicable, and negative if the option 18 * is applicable but the value is invalid. 19 **/ 20 int (*set_option)(struct transport *connection, const char *name, 21 const char *value); 22 /** 23 * Returns a list of the remote side's refs. In order to allow 24 * the transport to try to share connections, for_push is a 25 * hint as to whether the ultimate operation is a push or a fetch. 26 * 27 * If communicating using protocol v2 a list of prefixes can be 28 * provided to be sent to the server to enable it to limit the ref 29 * advertisement. Since ref filtering is done on the server's end, and 30 * only when using protocol v2, this list will be ignored when not 31 * using protocol v2 meaning this function can return refs which don't 32 * match the provided ref_prefixes. 33 * 34 * If the transport is able to determine the remote hash for 35 * the ref without a huge amount of effort, it should store it 36 * in the ref's old_sha1 field; otherwise it should be all 0. 37 **/ 38 struct ref *(*get_refs_list)(struct transport *transport, int for_push, 39 const struct argv_array *ref_prefixes); 40 41 /** 42 * Fetch the objects for the given refs. Note that this gets 43 * an array, and should ignore the list structure. 44 * 45 * If the transport did not get hashes for refs in 46 * get_refs_list(), it should set the old_sha1 fields in the 47 * provided refs now. 48 **/ 49 int (*fetch)(struct transport *transport, int refs_nr, struct ref **refs); 50 51 /** 52 * Push the objects and refs. Send the necessary objects, and 53 * then, for any refs where peer_ref is set and 54 * peer_ref->new_oid is different from old_oid, tell the 55 * remote side to update each ref in the list from old_oid to 56 * peer_ref->new_oid. 57 * 58 * Where possible, set the status for each ref appropriately. 59 * 60 * The transport must modify new_sha1 in the ref to the new 61 * value if the remote accepted the change. Note that this 62 * could be a different value from peer_ref->new_oid if the 63 * process involved generating new commits. 64 **/ 65 int (*push_refs)(struct transport *transport, struct ref *refs, int flags); 66 int (*connect)(struct transport *connection, const char *name, 67 const char *executable, int fd[2]); 68 69 /** get_refs_list(), fetch(), and push_refs() can keep 70 * resources (such as a connection) reserved for further 71 * use. disconnect() releases these resources. 72 **/ 73 int (*disconnect)(struct transport *connection); 74}; 75 76#endif