transport.h

   1 #ifndef TRANSPORT_H
   2 #define TRANSPORT_H
   3
   4 #include "cache.h"
   5 #include "run-command.h"
   6 #include "remote.h"
   7
   8 struct git_transport_options {
   9         unsigned thin : 1;
  10         unsigned keep : 1;
  11         unsigned followtags : 1;
  12         unsigned check_self_contained_and_connected : 1;
  13         unsigned self_contained_and_connected : 1;
  14         int depth;
  15         const char *uploadpack;
  16         const char *receivepack;
  17         struct push_cas_option *cas;
  18 };
  19
  20 struct transport {
  21         struct remote *remote;
  22         const char *url;
  23         void *data;
  24         const struct ref *remote_refs;
  25
  26         /**
  27          * Indicates whether we already called get_refs_list(); set by
  28          * transport.c::transport_get_remote_refs().
  29          */
  30         unsigned got_remote_refs : 1;
  31
  32         /*
  33          * Transports that call take-over destroys the data specific to
  34          * the transport type while doing so, and cannot be reused.
  35          */
  36         unsigned cannot_reuse : 1;
  37
  38         /**
  39          * Returns 0 if successful, positive if the option is not
  40          * recognized or is inapplicable, and negative if the option
  41          * is applicable but the value is invalid.
  42          **/
  43         int (*set_option)(struct transport *connection, const char *name,
  44                           const char *value);
  45
  46         /**
  47          * Returns a list of the remote side's refs. In order to allow
  48          * the transport to try to share connections, for_push is a
  49          * hint as to whether the ultimate operation is a push or a fetch.
  50          *
  51          * If the transport is able to determine the remote hash for
  52          * the ref without a huge amount of effort, it should store it
  53          * in the ref's old_sha1 field; otherwise it should be all 0.
  54          **/
  55         struct ref *(*get_refs_list)(struct transport *transport, int for_push);
  56
  57         /**
  58          * Fetch the objects for the given refs. Note that this gets
  59          * an array, and should ignore the list structure.
  60          *
  61          * If the transport did not get hashes for refs in
  62          * get_refs_list(), it should set the old_sha1 fields in the
  63          * provided refs now.
  64          **/
  65         int (*fetch)(struct transport *transport, int refs_nr, struct ref **refs);
  66
  67         /**
  68          * Push the objects and refs. Send the necessary objects, and
  69          * then, for any refs where peer_ref is set and
  70          * peer_ref->new_sha1 is different from old_sha1, tell the
  71          * remote side to update each ref in the list from old_sha1 to
  72          * peer_ref->new_sha1.
  73          *
  74          * Where possible, set the status for each ref appropriately.
  75          *
  76          * The transport must modify new_sha1 in the ref to the new
  77          * value if the remote accepted the change. Note that this
  78          * could be a different value from peer_ref->new_sha1 if the
  79          * process involved generating new commits.
  80          **/
  81         int (*push_refs)(struct transport *transport, struct ref *refs, int flags);
  82         int (*push)(struct transport *connection, int refspec_nr, const char **refspec, int flags);
  83         int (*connect)(struct transport *connection, const char *name,
  84                        const char *executable, int fd[2]);
  85
  86         /** get_refs_list(), fetch(), and push_refs() can keep
  87          * resources (such as a connection) reserved for further
  88          * use. disconnect() releases these resources.
  89          **/
  90         int (*disconnect)(struct transport *connection);
  91         char *pack_lockfile;
  92         signed verbose : 3;
  93         /**
  94          * Transports should not set this directly, and should use this
  95          * value without having to check isatty(2), -q/--quiet
  96          * (transport->verbose < 0), etc. - checking has already been done
  97          * in transport_set_verbosity().
  98          **/
  99         unsigned progress : 1;
 100         /*
 101          * If transport is at least potentially smart, this points to
 102          * git_transport_options structure to use in case transport
 103          * actually turns out to be smart.
 104          */
 105         struct git_transport_options *smart_options;
 106 };
 107
 108 #define TRANSPORT_PUSH_ALL 1
 109 #define TRANSPORT_PUSH_FORCE 2
 110 #define TRANSPORT_PUSH_DRY_RUN 4
 111 #define TRANSPORT_PUSH_MIRROR 8
 112 #define TRANSPORT_PUSH_PORCELAIN 16
 113 #define TRANSPORT_PUSH_SET_UPSTREAM 32
 114 #define TRANSPORT_RECURSE_SUBMODULES_CHECK 64
 115 #define TRANSPORT_PUSH_PRUNE 128
 116 #define TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND 256
 117 #define TRANSPORT_PUSH_NO_HOOK 512
 118 #define TRANSPORT_PUSH_FOLLOW_TAGS 1024
 119
 120 #define TRANSPORT_SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
 121 #define TRANSPORT_SUMMARY(x) (int)(TRANSPORT_SUMMARY_WIDTH + strlen(x) - gettext_width(x)), (x)
 122
 123 /* Returns a transport suitable for the url */
 124 struct transport *transport_get(struct remote *, const char *);
 125
 126 /* Transport options which apply to git:// and scp-style URLs */
 127
 128 /* The program to use on the remote side to send a pack */
 129 #define TRANS_OPT_UPLOADPACK "uploadpack"
 130
 131 /* The program to use on the remote side to receive a pack */
 132 #define TRANS_OPT_RECEIVEPACK "receivepack"
 133
 134 /* Transfer the data as a thin pack if not null */
 135 #define TRANS_OPT_THIN "thin"
 136
 137 /* Check the current value of the remote ref */
 138 #define TRANS_OPT_CAS "cas"
 139
 140 /* Keep the pack that was transferred if not null */
 141 #define TRANS_OPT_KEEP "keep"
 142
 143 /* Limit the depth of the fetch if not null */
 144 #define TRANS_OPT_DEPTH "depth"
 145
 146 /* Aggressively fetch annotated tags if possible */
 147 #define TRANS_OPT_FOLLOWTAGS "followtags"
 148
 149 /**
 150  * Returns 0 if the option was used, non-zero otherwise. Prints a
 151  * message to stderr if the option is not used.
 152  **/
 153 int transport_set_option(struct transport *transport, const char *name,
 154                          const char *value);
 155 void transport_set_verbosity(struct transport *transport, int verbosity,
 156         int force_progress);
 157
 158 #define REJECT_NON_FF_HEAD     0x01
 159 #define REJECT_NON_FF_OTHER    0x02
 160 #define REJECT_ALREADY_EXISTS  0x04
 161 #define REJECT_FETCH_FIRST     0x08
 162 #define REJECT_NEEDS_FORCE     0x10
 163
 164 int transport_push(struct transport *connection,
 165                    int refspec_nr, const char **refspec, int flags,
 166                    unsigned int * reject_reasons);
 167
 168 const struct ref *transport_get_remote_refs(struct transport *transport);
 169
 170 int transport_fetch_refs(struct transport *transport, struct ref *refs);
 171 void transport_unlock_pack(struct transport *transport);
 172 int transport_disconnect(struct transport *transport);
 173 char *transport_anonymize_url(const char *url);
 174 void transport_take_over(struct transport *transport,
 175                          struct child_process *child);
 176
 177 int transport_connect(struct transport *transport, const char *name,
 178                       const char *exec, int fd[2]);
 179
 180 /* Transport methods defined outside transport.c */
 181 int transport_helper_init(struct transport *transport, const char *name);
 182 int bidirectional_transfer_loop(int input, int output);
 183
 184 /* common methods used by transport.c and builtin/send-pack.c */
 185 void transport_verify_remote_names(int nr_heads, const char **heads);
 186
 187 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose);
 188
 189 int transport_refs_pushed(struct ref *ref);
 190
 191 void transport_print_push_status(const char *dest, struct ref *refs,
 192                   int verbose, int porcelain, unsigned int *reject_reasons);
 193
 194 typedef void alternate_ref_fn(const struct ref *, void *);
 195 extern void for_each_alternate_ref(alternate_ref_fn, void *);
 196
 197 struct send_pack_args;
 198 extern int send_pack(struct send_pack_args *args,
 199                      int fd[], struct child_process *conn,
 200                      struct ref *remote_refs,
 201                      struct extra_have_objects *extra_have);
 202 #endif