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         unsigned update_shallow : 1;
  15         int depth;
  16         const char *uploadpack;
  17         const char *receivepack;
  18         struct push_cas_option *cas;
  19 };
  20
  21 enum transport_family {
  22         TRANSPORT_FAMILY_ALL = 0,
  23         TRANSPORT_FAMILY_IPV4,
  24         TRANSPORT_FAMILY_IPV6
  25 };
  26
  27 struct transport {
  28         struct remote *remote;
  29         const char *url;
  30         void *data;
  31         const struct ref *remote_refs;
  32
  33         /**
  34          * Indicates whether we already called get_refs_list(); set by
  35          * transport.c::transport_get_remote_refs().
  36          */
  37         unsigned got_remote_refs : 1;
  38
  39         /*
  40          * Transports that call take-over destroys the data specific to
  41          * the transport type while doing so, and cannot be reused.
  42          */
  43         unsigned cannot_reuse : 1;
  44
  45         /*
  46          * A hint from caller that it will be performing a clone, not
  47          * normal fetch. IOW the repository is guaranteed empty.
  48          */
  49         unsigned cloning : 1;
  50
  51         /**
  52          * Returns 0 if successful, positive if the option is not
  53          * recognized or is inapplicable, and negative if the option
  54          * is applicable but the value is invalid.
  55          **/
  56         int (*set_option)(struct transport *connection, const char *name,
  57                           const char *value);
  58
  59         /**
  60          * Returns a list of the remote side's refs. In order to allow
  61          * the transport to try to share connections, for_push is a
  62          * hint as to whether the ultimate operation is a push or a fetch.
  63          *
  64          * If the transport is able to determine the remote hash for
  65          * the ref without a huge amount of effort, it should store it
  66          * in the ref's old_sha1 field; otherwise it should be all 0.
  67          **/
  68         struct ref *(*get_refs_list)(struct transport *transport, int for_push);
  69
  70         /**
  71          * Fetch the objects for the given refs. Note that this gets
  72          * an array, and should ignore the list structure.
  73          *
  74          * If the transport did not get hashes for refs in
  75          * get_refs_list(), it should set the old_sha1 fields in the
  76          * provided refs now.
  77          **/
  78         int (*fetch)(struct transport *transport, int refs_nr, struct ref **refs);
  79
  80         /**
  81          * Push the objects and refs. Send the necessary objects, and
  82          * then, for any refs where peer_ref is set and
  83          * peer_ref->new_oid is different from old_oid, tell the
  84          * remote side to update each ref in the list from old_oid to
  85          * peer_ref->new_oid.
  86          *
  87          * Where possible, set the status for each ref appropriately.
  88          *
  89          * The transport must modify new_sha1 in the ref to the new
  90          * value if the remote accepted the change. Note that this
  91          * could be a different value from peer_ref->new_oid if the
  92          * process involved generating new commits.
  93          **/
  94         int (*push_refs)(struct transport *transport, struct ref *refs, int flags);
  95         int (*push)(struct transport *connection, int refspec_nr, const char **refspec, int flags);
  96         int (*connect)(struct transport *connection, const char *name,
  97                        const char *executable, int fd[2]);
  98
  99         /** get_refs_list(), fetch(), and push_refs() can keep
 100          * resources (such as a connection) reserved for further
 101          * use. disconnect() releases these resources.
 102          **/
 103         int (*disconnect)(struct transport *connection);
 104         char *pack_lockfile;
 105         signed verbose : 3;
 106         /**
 107          * Transports should not set this directly, and should use this
 108          * value without having to check isatty(2), -q/--quiet
 109          * (transport->verbose < 0), etc. - checking has already been done
 110          * in transport_set_verbosity().
 111          **/
 112         unsigned progress : 1;
 113         /*
 114          * If transport is at least potentially smart, this points to
 115          * git_transport_options structure to use in case transport
 116          * actually turns out to be smart.
 117          */
 118         struct git_transport_options *smart_options;
 119
 120         enum transport_family family;
 121 };
 122
 123 #define TRANSPORT_PUSH_ALL 1
 124 #define TRANSPORT_PUSH_FORCE 2
 125 #define TRANSPORT_PUSH_DRY_RUN 4
 126 #define TRANSPORT_PUSH_MIRROR 8
 127 #define TRANSPORT_PUSH_PORCELAIN 16
 128 #define TRANSPORT_PUSH_SET_UPSTREAM 32
 129 #define TRANSPORT_RECURSE_SUBMODULES_CHECK 64
 130 #define TRANSPORT_PUSH_PRUNE 128
 131 #define TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND 256
 132 #define TRANSPORT_PUSH_NO_HOOK 512
 133 #define TRANSPORT_PUSH_FOLLOW_TAGS 1024
 134 #define TRANSPORT_PUSH_CERT_ALWAYS 2048
 135 #define TRANSPORT_PUSH_CERT_IF_ASKED 4096
 136 #define TRANSPORT_PUSH_ATOMIC 8192
 137
 138 #define TRANSPORT_SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
 139 #define TRANSPORT_SUMMARY(x) (int)(TRANSPORT_SUMMARY_WIDTH + strlen(x) - gettext_width(x)), (x)
 140
 141 /* Returns a transport suitable for the url */
 142 struct transport *transport_get(struct remote *, const char *);
 143
 144 /*
 145  * Check whether a transport is allowed by the environment. Type should
 146  * generally be the URL scheme, as described in Documentation/git.txt
 147  */
 148 int is_transport_allowed(const char *type);
 149
 150 /*
 151  * Check whether a transport is allowed by the environment,
 152  * and die otherwise.
 153  */
 154 void transport_check_allowed(const char *type);
 155
 156 /* Transport options which apply to git:// and scp-style URLs */
 157
 158 /* The program to use on the remote side to send a pack */
 159 #define TRANS_OPT_UPLOADPACK "uploadpack"
 160
 161 /* The program to use on the remote side to receive a pack */
 162 #define TRANS_OPT_RECEIVEPACK "receivepack"
 163
 164 /* Transfer the data as a thin pack if not null */
 165 #define TRANS_OPT_THIN "thin"
 166
 167 /* Check the current value of the remote ref */
 168 #define TRANS_OPT_CAS "cas"
 169
 170 /* Keep the pack that was transferred if not null */
 171 #define TRANS_OPT_KEEP "keep"
 172
 173 /* Limit the depth of the fetch if not null */
 174 #define TRANS_OPT_DEPTH "depth"
 175
 176 /* Aggressively fetch annotated tags if possible */
 177 #define TRANS_OPT_FOLLOWTAGS "followtags"
 178
 179 /* Accept refs that may update .git/shallow without --depth */
 180 #define TRANS_OPT_UPDATE_SHALLOW "updateshallow"
 181
 182 /* Send push certificates */
 183 #define TRANS_OPT_PUSH_CERT "pushcert"
 184
 185 /**
 186  * Returns 0 if the option was used, non-zero otherwise. Prints a
 187  * message to stderr if the option is not used.
 188  **/
 189 int transport_set_option(struct transport *transport, const char *name,
 190                          const char *value);
 191 void transport_set_verbosity(struct transport *transport, int verbosity,
 192         int force_progress);
 193
 194 #define REJECT_NON_FF_HEAD     0x01
 195 #define REJECT_NON_FF_OTHER    0x02
 196 #define REJECT_ALREADY_EXISTS  0x04
 197 #define REJECT_FETCH_FIRST     0x08
 198 #define REJECT_NEEDS_FORCE     0x10
 199
 200 int transport_push(struct transport *connection,
 201                    int refspec_nr, const char **refspec, int flags,
 202                    unsigned int * reject_reasons);
 203
 204 const struct ref *transport_get_remote_refs(struct transport *transport);
 205
 206 int transport_fetch_refs(struct transport *transport, struct ref *refs);
 207 void transport_unlock_pack(struct transport *transport);
 208 int transport_disconnect(struct transport *transport);
 209 char *transport_anonymize_url(const char *url);
 210 void transport_take_over(struct transport *transport,
 211                          struct child_process *child);
 212
 213 int transport_connect(struct transport *transport, const char *name,
 214                       const char *exec, int fd[2]);
 215
 216 /* Transport methods defined outside transport.c */
 217 int transport_helper_init(struct transport *transport, const char *name);
 218 int bidirectional_transfer_loop(int input, int output);
 219
 220 /* common methods used by transport.c and builtin/send-pack.c */
 221 void transport_verify_remote_names(int nr_heads, const char **heads);
 222
 223 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose);
 224
 225 int transport_refs_pushed(struct ref *ref);
 226
 227 void transport_print_push_status(const char *dest, struct ref *refs,
 228                   int verbose, int porcelain, unsigned int *reject_reasons);
 229
 230 typedef void alternate_ref_fn(const struct ref *, void *);
 231 extern void for_each_alternate_ref(alternate_ref_fn, void *);
 232 #endif