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 string_list;
   9
  10 struct git_transport_options {
  11         unsigned thin : 1;
  12         unsigned keep : 1;
  13         unsigned followtags : 1;
  14         unsigned check_self_contained_and_connected : 1;
  15         unsigned self_contained_and_connected : 1;
  16         unsigned update_shallow : 1;
  17         unsigned deepen_relative : 1;
  18         int depth;
  19         const char *deepen_since;
  20         const struct string_list *deepen_not;
  21         const char *uploadpack;
  22         const char *receivepack;
  23         struct push_cas_option *cas;
  24 };
  25
  26 enum transport_family {
  27         TRANSPORT_FAMILY_ALL = 0,
  28         TRANSPORT_FAMILY_IPV4,
  29         TRANSPORT_FAMILY_IPV6
  30 };
  31
  32 struct transport {
  33         struct remote *remote;
  34         const char *url;
  35         void *data;
  36         const struct ref *remote_refs;
  37
  38         /**
  39          * Indicates whether we already called get_refs_list(); set by
  40          * transport.c::transport_get_remote_refs().
  41          */
  42         unsigned got_remote_refs : 1;
  43
  44         /*
  45          * Transports that call take-over destroys the data specific to
  46          * the transport type while doing so, and cannot be reused.
  47          */
  48         unsigned cannot_reuse : 1;
  49
  50         /*
  51          * A hint from caller that it will be performing a clone, not
  52          * normal fetch. IOW the repository is guaranteed empty.
  53          */
  54         unsigned cloning : 1;
  55
  56         /*
  57          * These strings will be passed to the {pre, post}-receive hook,
  58          * on the remote side, if both sides support the push options capability.
  59          */
  60         const struct string_list *push_options;
  61
  62         /**
  63          * Returns 0 if successful, positive if the option is not
  64          * recognized or is inapplicable, and negative if the option
  65          * is applicable but the value is invalid.
  66          **/
  67         int (*set_option)(struct transport *connection, const char *name,
  68                           const char *value);
  69
  70         /**
  71          * Returns a list of the remote side's refs. In order to allow
  72          * the transport to try to share connections, for_push is a
  73          * hint as to whether the ultimate operation is a push or a fetch.
  74          *
  75          * If the transport is able to determine the remote hash for
  76          * the ref without a huge amount of effort, it should store it
  77          * in the ref's old_sha1 field; otherwise it should be all 0.
  78          **/
  79         struct ref *(*get_refs_list)(struct transport *transport, int for_push);
  80
  81         /**
  82          * Fetch the objects for the given refs. Note that this gets
  83          * an array, and should ignore the list structure.
  84          *
  85          * If the transport did not get hashes for refs in
  86          * get_refs_list(), it should set the old_sha1 fields in the
  87          * provided refs now.
  88          **/
  89         int (*fetch)(struct transport *transport, int refs_nr, struct ref **refs);
  90
  91         /**
  92          * Push the objects and refs. Send the necessary objects, and
  93          * then, for any refs where peer_ref is set and
  94          * peer_ref->new_oid is different from old_oid, tell the
  95          * remote side to update each ref in the list from old_oid to
  96          * peer_ref->new_oid.
  97          *
  98          * Where possible, set the status for each ref appropriately.
  99          *
 100          * The transport must modify new_sha1 in the ref to the new
 101          * value if the remote accepted the change. Note that this
 102          * could be a different value from peer_ref->new_oid if the
 103          * process involved generating new commits.
 104          **/
 105         int (*push_refs)(struct transport *transport, struct ref *refs, int flags);
 106         int (*push)(struct transport *connection, int refspec_nr, const char **refspec, int flags);
 107         int (*connect)(struct transport *connection, const char *name,
 108                        const char *executable, int fd[2]);
 109
 110         /** get_refs_list(), fetch(), and push_refs() can keep
 111          * resources (such as a connection) reserved for further
 112          * use. disconnect() releases these resources.
 113          **/
 114         int (*disconnect)(struct transport *connection);
 115         char *pack_lockfile;
 116         signed verbose : 3;
 117         /**
 118          * Transports should not set this directly, and should use this
 119          * value without having to check isatty(2), -q/--quiet
 120          * (transport->verbose < 0), etc. - checking has already been done
 121          * in transport_set_verbosity().
 122          **/
 123         unsigned progress : 1;
 124         /*
 125          * If transport is at least potentially smart, this points to
 126          * git_transport_options structure to use in case transport
 127          * actually turns out to be smart.
 128          */
 129         struct git_transport_options *smart_options;
 130
 131         enum transport_family family;
 132 };
 133
 134 #define TRANSPORT_PUSH_ALL 1
 135 #define TRANSPORT_PUSH_FORCE 2
 136 #define TRANSPORT_PUSH_DRY_RUN 4
 137 #define TRANSPORT_PUSH_MIRROR 8
 138 #define TRANSPORT_PUSH_PORCELAIN 16
 139 #define TRANSPORT_PUSH_SET_UPSTREAM 32
 140 #define TRANSPORT_RECURSE_SUBMODULES_CHECK 64
 141 #define TRANSPORT_PUSH_PRUNE 128
 142 #define TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND 256
 143 #define TRANSPORT_PUSH_NO_HOOK 512
 144 #define TRANSPORT_PUSH_FOLLOW_TAGS 1024
 145 #define TRANSPORT_PUSH_CERT_ALWAYS 2048
 146 #define TRANSPORT_PUSH_CERT_IF_ASKED 4096
 147 #define TRANSPORT_PUSH_ATOMIC 8192
 148 #define TRANSPORT_PUSH_OPTIONS 16384
 149
 150 extern int transport_summary_width(const struct ref *refs);
 151
 152 /* Returns a transport suitable for the url */
 153 struct transport *transport_get(struct remote *, const char *);
 154
 155 /*
 156  * Check whether a transport is allowed by the environment. Type should
 157  * generally be the URL scheme, as described in Documentation/git.txt
 158  */
 159 int is_transport_allowed(const char *type);
 160
 161 /*
 162  * Check whether a transport is allowed by the environment,
 163  * and die otherwise.
 164  */
 165 void transport_check_allowed(const char *type);
 166
 167 /*
 168  * Returns true if the user has attempted to turn on protocol
 169  * restrictions at all.
 170  */
 171 int transport_restrict_protocols(void);
 172
 173 /* Transport options which apply to git:// and scp-style URLs */
 174
 175 /* The program to use on the remote side to send a pack */
 176 #define TRANS_OPT_UPLOADPACK "uploadpack"
 177
 178 /* The program to use on the remote side to receive a pack */
 179 #define TRANS_OPT_RECEIVEPACK "receivepack"
 180
 181 /* Transfer the data as a thin pack if not null */
 182 #define TRANS_OPT_THIN "thin"
 183
 184 /* Check the current value of the remote ref */
 185 #define TRANS_OPT_CAS "cas"
 186
 187 /* Keep the pack that was transferred if not null */
 188 #define TRANS_OPT_KEEP "keep"
 189
 190 /* Limit the depth of the fetch if not null */
 191 #define TRANS_OPT_DEPTH "depth"
 192
 193 /* Limit the depth of the fetch based on time if not null */
 194 #define TRANS_OPT_DEEPEN_SINCE "deepen-since"
 195
 196 /* Limit the depth of the fetch based on revs if not null */
 197 #define TRANS_OPT_DEEPEN_NOT "deepen-not"
 198
 199 /* Limit the deepen of the fetch if not null */
 200 #define TRANS_OPT_DEEPEN_RELATIVE "deepen-relative"
 201
 202 /* Aggressively fetch annotated tags if possible */
 203 #define TRANS_OPT_FOLLOWTAGS "followtags"
 204
 205 /* Accept refs that may update .git/shallow without --depth */
 206 #define TRANS_OPT_UPDATE_SHALLOW "updateshallow"
 207
 208 /* Send push certificates */
 209 #define TRANS_OPT_PUSH_CERT "pushcert"
 210
 211 /**
 212  * Returns 0 if the option was used, non-zero otherwise. Prints a
 213  * message to stderr if the option is not used.
 214  **/
 215 int transport_set_option(struct transport *transport, const char *name,
 216                          const char *value);
 217 void transport_set_verbosity(struct transport *transport, int verbosity,
 218         int force_progress);
 219
 220 #define REJECT_NON_FF_HEAD     0x01
 221 #define REJECT_NON_FF_OTHER    0x02
 222 #define REJECT_ALREADY_EXISTS  0x04
 223 #define REJECT_FETCH_FIRST     0x08
 224 #define REJECT_NEEDS_FORCE     0x10
 225
 226 int transport_push(struct transport *connection,
 227                    int refspec_nr, const char **refspec, int flags,
 228                    unsigned int * reject_reasons);
 229
 230 const struct ref *transport_get_remote_refs(struct transport *transport);
 231
 232 int transport_fetch_refs(struct transport *transport, struct ref *refs);
 233 void transport_unlock_pack(struct transport *transport);
 234 int transport_disconnect(struct transport *transport);
 235 char *transport_anonymize_url(const char *url);
 236 void transport_take_over(struct transport *transport,
 237                          struct child_process *child);
 238
 239 int transport_connect(struct transport *transport, const char *name,
 240                       const char *exec, int fd[2]);
 241
 242 /* Transport methods defined outside transport.c */
 243 int transport_helper_init(struct transport *transport, const char *name);
 244 int bidirectional_transfer_loop(int input, int output);
 245
 246 /* common methods used by transport.c and builtin/send-pack.c */
 247 void transport_verify_remote_names(int nr_heads, const char **heads);
 248
 249 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose);
 250
 251 int transport_refs_pushed(struct ref *ref);
 252
 253 void transport_print_push_status(const char *dest, struct ref *refs,
 254                   int verbose, int porcelain, unsigned int *reject_reasons);
 255
 256 typedef void alternate_ref_fn(const struct ref *, void *);
 257 extern void for_each_alternate_ref(alternate_ref_fn, void *);
 258 #endif