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         unsigned check_self_contained_and_connected : 1;
  12         unsigned self_contained_and_connected : 1;
  13         int depth;
  14         const char *uploadpack;
  15         const char *receivepack;
  16 };
  17
  18 struct transport {
  19         struct remote *remote;
  20         const char *url;
  21         void *data;
  22         const struct ref *remote_refs;
  23
  24         /**
  25          * Indicates whether we already called get_refs_list(); set by
  26          * transport.c::transport_get_remote_refs().
  27          */
  28         unsigned got_remote_refs : 1;
  29
  30         /**
  31          * Returns 0 if successful, positive if the option is not
  32          * recognized or is inapplicable, and negative if the option
  33          * is applicable but the value is invalid.
  34          **/
  35         int (*set_option)(struct transport *connection, const char *name,
  36                           const char *value);
  37
  38         /**
  39          * Returns a list of the remote side's refs. In order to allow
  40          * the transport to try to share connections, for_push is a
  41          * hint as to whether the ultimate operation is a push or a fetch.
  42          *
  43          * If the transport is able to determine the remote hash for
  44          * the ref without a huge amount of effort, it should store it
  45          * in the ref's old_sha1 field; otherwise it should be all 0.
  46          **/
  47         struct ref *(*get_refs_list)(struct transport *transport, int for_push);
  48
  49         /**
  50          * Fetch the objects for the given refs. Note that this gets
  51          * an array, and should ignore the list structure.
  52          *
  53          * If the transport did not get hashes for refs in
  54          * get_refs_list(), it should set the old_sha1 fields in the
  55          * provided refs now.
  56          **/
  57         int (*fetch)(struct transport *transport, int refs_nr, struct ref **refs);
  58
  59         /**
  60          * Push the objects and refs. Send the necessary objects, and
  61          * then, for any refs where peer_ref is set and
  62          * peer_ref->new_sha1 is different from old_sha1, tell the
  63          * remote side to update each ref in the list from old_sha1 to
  64          * peer_ref->new_sha1.
  65          *
  66          * Where possible, set the status for each ref appropriately.
  67          *
  68          * The transport must modify new_sha1 in the ref to the new
  69          * value if the remote accepted the change. Note that this
  70          * could be a different value from peer_ref->new_sha1 if the
  71          * process involved generating new commits.
  72          **/
  73         int (*push_refs)(struct transport *transport, struct ref *refs, int flags);
  74         int (*push)(struct transport *connection, int refspec_nr, const char **refspec, int flags);
  75         int (*connect)(struct transport *connection, const char *name,
  76                        const char *executable, int fd[2]);
  77
  78         /** get_refs_list(), fetch(), and push_refs() can keep
  79          * resources (such as a connection) reserved for further
  80          * use. disconnect() releases these resources.
  81          **/
  82         int (*disconnect)(struct transport *connection);
  83         char *pack_lockfile;
  84         signed verbose : 3;
  85         /**
  86          * Transports should not set this directly, and should use this
  87          * value without having to check isatty(2), -q/--quiet
  88          * (transport->verbose < 0), etc. - checking has already been done
  89          * in transport_set_verbosity().
  90          **/
  91         unsigned progress : 1;
  92         /*
  93          * If transport is at least potentially smart, this points to
  94          * git_transport_options structure to use in case transport
  95          * actually turns out to be smart.
  96          */
  97         struct git_transport_options *smart_options;
  98 };
  99
 100 #define TRANSPORT_PUSH_ALL 1
 101 #define TRANSPORT_PUSH_FORCE 2
 102 #define TRANSPORT_PUSH_DRY_RUN 4
 103 #define TRANSPORT_PUSH_MIRROR 8
 104 #define TRANSPORT_PUSH_PORCELAIN 16
 105 #define TRANSPORT_PUSH_SET_UPSTREAM 32
 106 #define TRANSPORT_RECURSE_SUBMODULES_CHECK 64
 107 #define TRANSPORT_PUSH_PRUNE 128
 108 #define TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND 256
 109 #define TRANSPORT_PUSH_NO_HOOK 512
 110 #define TRANSPORT_PUSH_FOLLOW_TAGS 1024
 111
 112 #define TRANSPORT_SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
 113 #define TRANSPORT_SUMMARY(x) (int)(TRANSPORT_SUMMARY_WIDTH + strlen(x) - gettext_width(x)), (x)
 114
 115 /* Returns a transport suitable for the url */
 116 struct transport *transport_get(struct remote *, const char *);
 117
 118 /* Transport options which apply to git:// and scp-style URLs */
 119
 120 /* The program to use on the remote side to send a pack */
 121 #define TRANS_OPT_UPLOADPACK "uploadpack"
 122
 123 /* The program to use on the remote side to receive a pack */
 124 #define TRANS_OPT_RECEIVEPACK "receivepack"
 125
 126 /* Transfer the data as a thin pack if not null */
 127 #define TRANS_OPT_THIN "thin"
 128
 129 /* Keep the pack that was transferred if not null */
 130 #define TRANS_OPT_KEEP "keep"
 131
 132 /* Limit the depth of the fetch if not null */
 133 #define TRANS_OPT_DEPTH "depth"
 134
 135 /* Aggressively fetch annotated tags if possible */
 136 #define TRANS_OPT_FOLLOWTAGS "followtags"
 137
 138 /**
 139  * Returns 0 if the option was used, non-zero otherwise. Prints a
 140  * message to stderr if the option is not used.
 141  **/
 142 int transport_set_option(struct transport *transport, const char *name,
 143                          const char *value);
 144 void transport_set_verbosity(struct transport *transport, int verbosity,
 145         int force_progress);
 146
 147 #define REJECT_NON_FF_HEAD     0x01
 148 #define REJECT_NON_FF_OTHER    0x02
 149 #define REJECT_ALREADY_EXISTS  0x04
 150 #define REJECT_FETCH_FIRST     0x08
 151 #define REJECT_NEEDS_FORCE     0x10
 152
 153 int transport_push(struct transport *connection,
 154                    int refspec_nr, const char **refspec, int flags,
 155                    unsigned int * reject_reasons);
 156
 157 const struct ref *transport_get_remote_refs(struct transport *transport);
 158
 159 int transport_fetch_refs(struct transport *transport, struct ref *refs);
 160 void transport_unlock_pack(struct transport *transport);
 161 int transport_disconnect(struct transport *transport);
 162 char *transport_anonymize_url(const char *url);
 163 void transport_take_over(struct transport *transport,
 164                          struct child_process *child);
 165
 166 int transport_connect(struct transport *transport, const char *name,
 167                       const char *exec, int fd[2]);
 168
 169 /* Transport methods defined outside transport.c */
 170 int transport_helper_init(struct transport *transport, const char *name);
 171 int bidirectional_transfer_loop(int input, int output);
 172
 173 /* common methods used by transport.c and builtin/send-pack.c */
 174 void transport_verify_remote_names(int nr_heads, const char **heads);
 175
 176 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose);
 177
 178 int transport_refs_pushed(struct ref *ref);
 179
 180 void transport_print_push_status(const char *dest, struct ref *refs,
 181                   int verbose, int porcelain, unsigned int *reject_reasons);
 182
 183 typedef void alternate_ref_fn(const struct ref *, void *);
 184 extern void for_each_alternate_ref(alternate_ref_fn, void *);
 185
 186 struct send_pack_args;
 187 extern int send_pack(struct send_pack_args *args,
 188                      int fd[], struct child_process *conn,
 189                      struct ref *remote_refs,
 190                      struct extra_have_objects *extra_have);
 191 #endif