transport.h

   1 #ifndef TRANSPORT_H
   2 #define TRANSPORT_H
   3
   4 #include "cache.h"
   5 #include "remote.h"
   6
   7 struct git_transport_options {
   8         unsigned thin : 1;
   9         unsigned keep : 1;
  10         unsigned followtags : 1;
  11         int depth;
  12         const char *uploadpack;
  13         const char *receivepack;
  14 };
  15
  16 struct transport {
  17         struct remote *remote;
  18         const char *url;
  19         void *data;
  20         const struct ref *remote_refs;
  21
  22         /**
  23          * Indicates whether we already called get_refs_list(); set by
  24          * transport.c::transport_get_remote_refs().
  25          */
  26         unsigned got_remote_refs : 1;
  27
  28         /**
  29          * Returns 0 if successful, positive if the option is not
  30          * recognized or is inapplicable, and negative if the option
  31          * is applicable but the value is invalid.
  32          **/
  33         int (*set_option)(struct transport *connection, const char *name,
  34                           const char *value);
  35
  36         /**
  37          * Returns a list of the remote side's refs. In order to allow
  38          * the transport to try to share connections, for_push is a
  39          * hint as to whether the ultimate operation is a push or a fetch.
  40          *
  41          * If the transport is able to determine the remote hash for
  42          * the ref without a huge amount of effort, it should store it
  43          * in the ref's old_sha1 field; otherwise it should be all 0.
  44          **/
  45         struct ref *(*get_refs_list)(struct transport *transport, int for_push);
  46
  47         /**
  48          * Fetch the objects for the given refs. Note that this gets
  49          * an array, and should ignore the list structure.
  50          *
  51          * If the transport did not get hashes for refs in
  52          * get_refs_list(), it should set the old_sha1 fields in the
  53          * provided refs now.
  54          **/
  55         int (*fetch)(struct transport *transport, int refs_nr, struct ref **refs);
  56
  57         /**
  58          * Push the objects and refs. Send the necessary objects, and
  59          * then, for any refs where peer_ref is set and
  60          * peer_ref->new_sha1 is different from old_sha1, tell the
  61          * remote side to update each ref in the list from old_sha1 to
  62          * peer_ref->new_sha1.
  63          *
  64          * Where possible, set the status for each ref appropriately.
  65          *
  66          * The transport must modify new_sha1 in the ref to the new
  67          * value if the remote accepted the change. Note that this
  68          * could be a different value from peer_ref->new_sha1 if the
  69          * process involved generating new commits.
  70          **/
  71         int (*push_refs)(struct transport *transport, struct ref *refs, int flags);
  72         int (*push)(struct transport *connection, int refspec_nr, const char **refspec, int flags);
  73         int (*connect)(struct transport *connection, const char *name,
  74                        const char *executable, int fd[2]);
  75
  76         /** get_refs_list(), fetch(), and push_refs() can keep
  77          * resources (such as a connection) reserved for futher
  78          * use. disconnect() releases these resources.
  79          **/
  80         int (*disconnect)(struct transport *connection);
  81         char *pack_lockfile;
  82         signed verbose : 3;
  83         /* Force progress even if stderr is not a tty */
  84         unsigned progress : 1;
  85         /*
  86          * If transport is at least potentially smart, this points to
  87          * git_transport_options structure to use in case transport
  88          * actually turns out to be smart.
  89          */
  90         struct git_transport_options *smart_options;
  91 };
  92
  93 #define TRANSPORT_PUSH_ALL 1
  94 #define TRANSPORT_PUSH_FORCE 2
  95 #define TRANSPORT_PUSH_DRY_RUN 4
  96 #define TRANSPORT_PUSH_MIRROR 8
  97 #define TRANSPORT_PUSH_VERBOSE 16
  98 #define TRANSPORT_PUSH_PORCELAIN 32
  99 #define TRANSPORT_PUSH_QUIET 64
 100 #define TRANSPORT_PUSH_SET_UPSTREAM 128
 101
 102 /* Returns a transport suitable for the url */
 103 struct transport *transport_get(struct remote *, const char *);
 104
 105 /* Transport options which apply to git:// and scp-style URLs */
 106
 107 /* The program to use on the remote side to send a pack */
 108 #define TRANS_OPT_UPLOADPACK "uploadpack"
 109
 110 /* The program to use on the remote side to receive a pack */
 111 #define TRANS_OPT_RECEIVEPACK "receivepack"
 112
 113 /* Transfer the data as a thin pack if not null */
 114 #define TRANS_OPT_THIN "thin"
 115
 116 /* Keep the pack that was transferred if not null */
 117 #define TRANS_OPT_KEEP "keep"
 118
 119 /* Limit the depth of the fetch if not null */
 120 #define TRANS_OPT_DEPTH "depth"
 121
 122 /* Aggressively fetch annotated tags if possible */
 123 #define TRANS_OPT_FOLLOWTAGS "followtags"
 124
 125 /**
 126  * Returns 0 if the option was used, non-zero otherwise. Prints a
 127  * message to stderr if the option is not used.
 128  **/
 129 int transport_set_option(struct transport *transport, const char *name,
 130                          const char *value);
 131
 132 int transport_push(struct transport *connection,
 133                    int refspec_nr, const char **refspec, int flags,
 134                    int * nonfastforward);
 135
 136 const struct ref *transport_get_remote_refs(struct transport *transport);
 137
 138 int transport_fetch_refs(struct transport *transport, struct ref *refs);
 139 void transport_unlock_pack(struct transport *transport);
 140 int transport_disconnect(struct transport *transport);
 141 char *transport_anonymize_url(const char *url);
 142 void transport_take_over(struct transport *transport,
 143                          struct child_process *child);
 144
 145 int transport_connect(struct transport *transport, const char *name,
 146                       const char *exec, int fd[2]);
 147
 148 /* Transport methods defined outside transport.c */
 149 int transport_helper_init(struct transport *transport, const char *name);
 150
 151 #endif