remote.h

   1 #ifndef REMOTE_H
   2 #define REMOTE_H
   3
   4 #include "cache.h"
   5 #include "parse-options.h"
   6 #include "hashmap.h"
   7 #include "refspec.h"
   8
   9 /**
  10  * The API gives access to the configuration related to remotes. It handles
  11  * all three configuration mechanisms historically and currently used by Git,
  12  * and presents the information in a uniform fashion. Note that the code also
  13  * handles plain URLs without any configuration, giving them just the default
  14  * information.
  15  */
  16
  17 enum {
  18         REMOTE_UNCONFIGURED = 0,
  19         REMOTE_CONFIG,
  20         REMOTE_REMOTES,
  21         REMOTE_BRANCHES
  22 };
  23
  24 struct remote {
  25         struct hashmap_entry ent;
  26
  27         /* The user's nickname for the remote */
  28         const char *name;
  29
  30         int origin, configured_in_repo;
  31
  32         const char *foreign_vcs;
  33
  34         /* An array of all of the url_nr URLs configured for the remote */
  35         const char **url;
  36
  37         int url_nr;
  38         int url_alloc;
  39
  40         /* An array of all of the pushurl_nr push URLs configured for the remote */
  41         const char **pushurl;
  42
  43         int pushurl_nr;
  44         int pushurl_alloc;
  45
  46         struct refspec push;
  47
  48         struct refspec fetch;
  49
  50         /*
  51          * The setting for whether to fetch tags (as a separate rule from the
  52          * configured refspecs);
  53          * -1 to never fetch tags
  54          * 0 to auto-follow tags on heuristic (default)
  55          * 1 to always auto-follow tags
  56          * 2 to always fetch tags
  57          */
  58         int fetch_tags;
  59
  60         int skip_default_update;
  61         int mirror;
  62         int prune;
  63         int prune_tags;
  64
  65         /**
  66          * The configured helper programs to run on the remote side, for
  67          * Git-native protocols.
  68          */
  69         const char *receivepack;
  70         const char *uploadpack;
  71
  72         /* The proxy to use for curl (http, https, ftp, etc.) URLs. */
  73         char *http_proxy;
  74
  75         /* The method used for authenticating against `http_proxy`. */
  76         char *http_proxy_authmethod;
  77 };
  78
  79 /**
  80  * struct remotes can be found by name with remote_get().
  81  * remote_get(NULL) will return the default remote, given the current branch
  82  * and configuration.
  83  */
  84 struct remote *remote_get(const char *name);
  85
  86 struct remote *pushremote_get(const char *name);
  87 int remote_is_configured(struct remote *remote, int in_repo);
  88
  89 typedef int each_remote_fn(struct remote *remote, void *priv);
  90
  91 /* iterate through struct remotes */
  92 int for_each_remote(each_remote_fn fn, void *priv);
  93
  94 int remote_has_url(struct remote *remote, const char *url);
  95
  96 struct ref_push_report {
  97         const char *ref_name;
  98         struct object_id *old_oid;
  99         struct object_id *new_oid;
 100         unsigned int forced_update:1;
 101         struct ref_push_report *next;
 102 };
 103
 104 struct ref {
 105         struct ref *next;
 106         struct object_id old_oid;
 107         struct object_id new_oid;
 108         struct object_id old_oid_expect; /* used by expect-old */
 109         char *symref;
 110         char *tracking_ref;
 111         unsigned int
 112                 force:1,
 113                 forced_update:1,
 114                 expect_old_sha1:1,
 115                 exact_oid:1,
 116                 deletion:1,
 117                 /* Need to check if local reflog reaches the remote tip. */
 118                 check_reachable:1,
 119                 /*
 120                  * Store the result of the check enabled by "check_reachable";
 121                  * implies the local reflog does not reach the remote tip.
 122                  */
 123                 unreachable:1;
 124
 125         enum {
 126                 REF_NOT_MATCHED = 0, /* initial value */
 127                 REF_MATCHED,
 128                 REF_UNADVERTISED_NOT_ALLOWED
 129         } match_status;
 130
 131         /*
 132          * Order is important here, as we write to FETCH_HEAD
 133          * in numeric order. And the default NOT_FOR_MERGE
 134          * should be 0, so that xcalloc'd structures get it
 135          * by default.
 136          */
 137         enum fetch_head_status {
 138                 FETCH_HEAD_MERGE = -1,
 139                 FETCH_HEAD_NOT_FOR_MERGE = 0,
 140                 FETCH_HEAD_IGNORE = 1
 141         } fetch_head_status;
 142
 143         enum {
 144                 REF_STATUS_NONE = 0,
 145                 REF_STATUS_OK,
 146                 REF_STATUS_REJECT_NONFASTFORWARD,
 147                 REF_STATUS_REJECT_ALREADY_EXISTS,
 148                 REF_STATUS_REJECT_NODELETE,
 149                 REF_STATUS_REJECT_FETCH_FIRST,
 150                 REF_STATUS_REJECT_NEEDS_FORCE,
 151                 REF_STATUS_REJECT_STALE,
 152                 REF_STATUS_REJECT_SHALLOW,
 153                 REF_STATUS_REJECT_REMOTE_UPDATED,
 154                 REF_STATUS_UPTODATE,
 155                 REF_STATUS_REMOTE_REJECT,
 156                 REF_STATUS_EXPECTING_REPORT,
 157                 REF_STATUS_ATOMIC_PUSH_FAILED
 158         } status;
 159         char *remote_status;
 160         struct ref_push_report *report;
 161         struct ref *peer_ref; /* when renaming */
 162         char name[FLEX_ARRAY]; /* more */
 163 };
 164
 165 #define REF_NORMAL      (1u << 0)
 166 #define REF_HEADS       (1u << 1)
 167 #define REF_TAGS        (1u << 2)
 168
 169 struct ref *find_ref_by_name(const struct ref *list, const char *name);
 170
 171 struct ref *alloc_ref(const char *name);
 172 struct ref *copy_ref(const struct ref *ref);
 173 struct ref *copy_ref_list(const struct ref *ref);
 174 void sort_ref_list(struct ref **, int (*cmp)(const void *, const void *));
 175 int count_refspec_match(const char *, struct ref *refs, struct ref **matched_ref);
 176 int ref_compare_name(const void *, const void *);
 177
 178 int check_ref_type(const struct ref *ref, int flags);
 179
 180 /*
 181  * Free a single ref and its peer, or an entire list of refs and their peers,
 182  * respectively.
 183  */
 184 void free_one_ref(struct ref *ref);
 185 void free_refs(struct ref *ref);
 186
 187 struct oid_array;
 188 struct packet_reader;
 189 struct strvec;
 190 struct string_list;
 191 struct ref **get_remote_heads(struct packet_reader *reader,
 192                               struct ref **list, unsigned int flags,
 193                               struct oid_array *extra_have,
 194                               struct oid_array *shallow_points);
 195
 196 /* Used for protocol v2 in order to retrieve refs from a remote */
 197 struct ref **get_remote_refs(int fd_out, struct packet_reader *reader,
 198                              struct ref **list, int for_push,
 199                              const struct strvec *ref_prefixes,
 200                              const struct string_list *server_options,
 201                              int stateless_rpc);
 202
 203 int resolve_remote_symref(struct ref *ref, struct ref *list);
 204
 205 /*
 206  * Remove and free all but the first of any entries in the input list
 207  * that map the same remote reference to the same local reference.  If
 208  * there are two entries that map different remote references to the
 209  * same local reference, emit an error message and die.  Return a
 210  * pointer to the head of the resulting list.
 211  */
 212 struct ref *ref_remove_duplicates(struct ref *ref_map);
 213
 214 /*
 215  * Remove all entries in the input list which match any negative refspec in
 216  * the refspec list.
 217  */
 218 struct ref *apply_negative_refspecs(struct ref *ref_map, struct refspec *rs);
 219
 220 int query_refspecs(struct refspec *rs, struct refspec_item *query);
 221 char *apply_refspecs(struct refspec *rs, const char *name);
 222
 223 int check_push_refs(struct ref *src, struct refspec *rs);
 224 int match_push_refs(struct ref *src, struct ref **dst,
 225                     struct refspec *rs, int flags);
 226 void set_ref_status_for_push(struct ref *remote_refs, int send_mirror,
 227         int force_update);
 228
 229 /*
 230  * Given a list of the remote refs and the specification of things to
 231  * fetch, makes a (separate) list of the refs to fetch and the local
 232  * refs to store into. Note that negative refspecs are ignored here, and
 233  * should be handled separately.
 234  *
 235  * *tail is the pointer to the tail pointer of the list of results
 236  * beforehand, and will be set to the tail pointer of the list of
 237  * results afterward.
 238  *
 239  * missing_ok is usually false, but when we are adding branch.$name.merge
 240  * it is Ok if the branch is not at the remote anymore.
 241  */
 242 int get_fetch_map(const struct ref *remote_refs, const struct refspec_item *refspec,
 243                   struct ref ***tail, int missing_ok);
 244
 245 struct ref *get_remote_ref(const struct ref *remote_refs, const char *name);
 246
 247 /*
 248  * For the given remote, reads the refspec's src and sets the other fields.
 249  */
 250 int remote_find_tracking(struct remote *remote, struct refspec_item *refspec);
 251
 252 /**
 253  * struct branch holds the configuration for a branch. It can be looked up with
 254  * branch_get(name) for "refs/heads/{name}", or with branch_get(NULL) for HEAD.
 255  */
 256 struct branch {
 257
 258         /* The short name of the branch. */
 259         const char *name;
 260
 261         /* The full path for the branch ref. */
 262         const char *refname;
 263
 264         /* The name of the remote listed in the configuration. */
 265         const char *remote_name;
 266
 267         const char *pushremote_name;
 268
 269         /* An array of the "merge" lines in the configuration. */
 270         const char **merge_name;
 271
 272         /**
 273          * An array of the struct refspecs used for the merge lines. That is,
 274          * merge[i]->dst is a local tracking ref which should be merged into this
 275          * branch by default.
 276          */
 277         struct refspec_item **merge;
 278
 279         /* The number of merge configurations */
 280         int merge_nr;
 281
 282         int merge_alloc;
 283
 284         const char *push_tracking_ref;
 285 };
 286
 287 struct branch *branch_get(const char *name);
 288 const char *remote_for_branch(struct branch *branch, int *explicit);
 289 const char *pushremote_for_branch(struct branch *branch, int *explicit);
 290 const char *remote_ref_for_branch(struct branch *branch, int for_push);
 291
 292 /* returns true if the given branch has merge configuration given. */
 293 int branch_has_merge_config(struct branch *branch);
 294
 295 int branch_merge_matches(struct branch *, int n, const char *);
 296
 297 /**
 298  * Return the fully-qualified refname of the tracking branch for `branch`.
 299  * I.e., what "branch@{upstream}" would give you. Returns NULL if no
 300  * upstream is defined.
 301  *
 302  * If `err` is not NULL and no upstream is defined, a more specific error
 303  * message is recorded there (if the function does not return NULL, then
 304  * `err` is not touched).
 305  */
 306 const char *branch_get_upstream(struct branch *branch, struct strbuf *err);
 307
 308 /**
 309  * Return the tracking branch that corresponds to the ref we would push to
 310  * given a bare `git push` while `branch` is checked out.
 311  *
 312  * The return value and `err` conventions match those of `branch_get_upstream`.
 313  */
 314 const char *branch_get_push(struct branch *branch, struct strbuf *err);
 315
 316 /* Flags to match_refs. */
 317 enum match_refs_flags {
 318         MATCH_REFS_NONE         = 0,
 319         MATCH_REFS_ALL          = (1 << 0),
 320         MATCH_REFS_MIRROR       = (1 << 1),
 321         MATCH_REFS_PRUNE        = (1 << 2),
 322         MATCH_REFS_FOLLOW_TAGS  = (1 << 3)
 323 };
 324
 325 /* Flags for --ahead-behind option. */
 326 enum ahead_behind_flags {
 327         AHEAD_BEHIND_UNSPECIFIED = -1,
 328         AHEAD_BEHIND_QUICK       =  0,  /* just eq/neq reporting */
 329         AHEAD_BEHIND_FULL        =  1,  /* traditional a/b reporting */
 330 };
 331
 332 /* Reporting of tracking info */
 333 int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs,
 334                        const char **upstream_name, int for_push,
 335                        enum ahead_behind_flags abf);
 336 int format_tracking_info(struct branch *branch, struct strbuf *sb,
 337                          enum ahead_behind_flags abf);
 338
 339 struct ref *get_local_heads(void);
 340 /*
 341  * Find refs from a list which are likely to be pointed to by the given HEAD
 342  * ref. If 'all' is false, returns the most likely ref; otherwise, returns a
 343  * list of all candidate refs. If no match is found (or 'head' is NULL),
 344  * returns NULL. All returns are newly allocated and should be freed.
 345  */
 346 struct ref *guess_remote_head(const struct ref *head,
 347                               const struct ref *refs,
 348                               int all);
 349
 350 /* Return refs which no longer exist on remote */
 351 struct ref *get_stale_heads(struct refspec *rs, struct ref *fetch_map);
 352
 353 /*
 354  * Compare-and-swap
 355  */
 356 #define CAS_OPT_NAME "force-with-lease"
 357
 358 struct push_cas_option {
 359         unsigned use_tracking_for_rest:1;
 360         unsigned use_force_if_includes:1;
 361         struct push_cas {
 362                 struct object_id expect;
 363                 unsigned use_tracking:1;
 364                 char *refname;
 365         } *entry;
 366         int nr;
 367         int alloc;
 368 };
 369
 370 int parseopt_push_cas_option(const struct option *, const char *arg, int unset);
 371
 372 int is_empty_cas(const struct push_cas_option *);
 373 void apply_push_cas(struct push_cas_option *, struct remote *, struct ref *);
 374
 375 #endif