transport-internal.h

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