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 struct transport_ls_refs_options;
  10
  11 /**
  12  * The API gives access to the configuration related to remotes. It handles
  13  * all three configuration mechanisms historically and currently used by Git,
  14  * and presents the information in a uniform fashion. Note that the code also
  15  * handles plain URLs without any configuration, giving them just the default
  16  * information.
  17  */
  18
  19 enum {
  20         REMOTE_UNCONFIGURED = 0,
  21         REMOTE_CONFIG,
  22         REMOTE_REMOTES,
  23         REMOTE_BRANCHES
  24 };
  25
  26 struct rewrite {
  27         const char *base;
  28         size_t baselen;
  29         struct counted_string *instead_of;
  30         int instead_of_nr;
  31         int instead_of_alloc;
  32 };
  33
  34 struct rewrites {
  35         struct rewrite **rewrite;
  36         int rewrite_alloc;
  37         int rewrite_nr;
  38 };
  39
  40 struct remote_state {
  41         struct remote **remotes;
  42         int remotes_alloc;
  43         int remotes_nr;
  44         struct hashmap remotes_hash;
  45
  46         struct hashmap branches_hash;
  47
  48         struct branch *current_branch;
  49         const char *pushremote_name;
  50
  51         struct rewrites rewrites;
  52         struct rewrites rewrites_push;
  53
  54         int initialized;
  55 };
  56
  57 void remote_state_clear(struct remote_state *remote_state);
  58 struct remote_state *remote_state_new(void);
  59
  60 struct remote {
  61         struct hashmap_entry ent;
  62
  63         /* The user's nickname for the remote */
  64         const char *name;
  65
  66         int origin, configured_in_repo;
  67
  68         const char *foreign_vcs;
  69
  70         /* An array of all of the url_nr URLs configured for the remote */
  71         const char **url;
  72
  73         int url_nr;
  74         int url_alloc;
  75
  76         /* An array of all of the pushurl_nr push URLs configured for the remote */
  77         const char **pushurl;
  78
  79         int pushurl_nr;
  80         int pushurl_alloc;
  81
  82         struct refspec push;
  83
  84         struct refspec fetch;
  85
  86         /*
  87          * The setting for whether to fetch tags (as a separate rule from the
  88          * configured refspecs);
  89          * -1 to never fetch tags
  90          * 0 to auto-follow tags on heuristic (default)
  91          * 1 to always auto-follow tags
  92          * 2 to always fetch tags
  93          */
  94         int fetch_tags;
  95
  96         int skip_default_update;
  97         int mirror;
  98         int prune;
  99         int prune_tags;
 100
 101         /**
 102          * The configured helper programs to run on the remote side, for
 103          * Git-native protocols.
 104          */
 105         const char *receivepack;
 106         const char *uploadpack;
 107
 108         /* The proxy to use for curl (http, https, ftp, etc.) URLs. */
 109         char *http_proxy;
 110
 111         /* The method used for authenticating against `http_proxy`. */
 112         char *http_proxy_authmethod;
 113 };
 114
 115 /**
 116  * struct remotes can be found by name with remote_get().
 117  * remote_get(NULL) will return the default remote, given the current branch
 118  * and configuration.
 119  */
 120 struct remote *remote_get(const char *name);
 121
 122 struct remote *pushremote_get(const char *name);
 123 int remote_is_configured(struct remote *remote, int in_repo);
 124
 125 typedef int each_remote_fn(struct remote *remote, void *priv);
 126
 127 /* iterate through struct remotes */
 128 int for_each_remote(each_remote_fn fn, void *priv);
 129
 130 int remote_has_url(struct remote *remote, const char *url);
 131
 132 struct ref_push_report {
 133         const char *ref_name;
 134         struct object_id *old_oid;
 135         struct object_id *new_oid;
 136         unsigned int forced_update:1;
 137         struct ref_push_report *next;
 138 };
 139
 140 struct ref {
 141         struct ref *next;
 142         struct object_id old_oid;
 143         struct object_id new_oid;
 144         struct object_id old_oid_expect; /* used by expect-old */
 145         char *symref;
 146         char *tracking_ref;
 147         unsigned int
 148                 force:1,
 149                 forced_update:1,
 150                 expect_old_sha1:1,
 151                 exact_oid:1,
 152                 deletion:1,
 153                 /* Need to check if local reflog reaches the remote tip. */
 154                 check_reachable:1,
 155                 /*
 156                  * Store the result of the check enabled by "check_reachable";
 157                  * implies the local reflog does not reach the remote tip.
 158                  */
 159                 unreachable:1;
 160
 161         enum {
 162                 REF_NOT_MATCHED = 0, /* initial value */
 163                 REF_MATCHED,
 164                 REF_UNADVERTISED_NOT_ALLOWED
 165         } match_status;
 166
 167         /*
 168          * Order is important here, as we write to FETCH_HEAD
 169          * in numeric order. And the default NOT_FOR_MERGE
 170          * should be 0, so that xcalloc'd structures get it
 171          * by default.
 172          */
 173         enum fetch_head_status {
 174                 FETCH_HEAD_MERGE = -1,
 175                 FETCH_HEAD_NOT_FOR_MERGE = 0,
 176                 FETCH_HEAD_IGNORE = 1
 177         } fetch_head_status;
 178
 179         enum {
 180                 REF_STATUS_NONE = 0,
 181                 REF_STATUS_OK,
 182                 REF_STATUS_REJECT_NONFASTFORWARD,
 183                 REF_STATUS_REJECT_ALREADY_EXISTS,
 184                 REF_STATUS_REJECT_NODELETE,
 185                 REF_STATUS_REJECT_FETCH_FIRST,
 186                 REF_STATUS_REJECT_NEEDS_FORCE,
 187                 REF_STATUS_REJECT_STALE,
 188                 REF_STATUS_REJECT_SHALLOW,
 189                 REF_STATUS_REJECT_REMOTE_UPDATED,
 190                 REF_STATUS_UPTODATE,
 191                 REF_STATUS_REMOTE_REJECT,
 192                 REF_STATUS_EXPECTING_REPORT,
 193                 REF_STATUS_ATOMIC_PUSH_FAILED
 194         } status;
 195         char *remote_status;
 196         struct ref_push_report *report;
 197         struct ref *peer_ref; /* when renaming */
 198         char name[FLEX_ARRAY]; /* more */
 199 };
 200
 201 #define REF_NORMAL      (1u << 0)
 202 #define REF_HEADS       (1u << 1)
 203 #define REF_TAGS        (1u << 2)
 204
 205 struct ref *find_ref_by_name(const struct ref *list, const char *name);
 206
 207 struct ref *alloc_ref(const char *name);
 208 struct ref *copy_ref(const struct ref *ref);
 209 struct ref *copy_ref_list(const struct ref *ref);
 210 void sort_ref_list(struct ref **, int (*cmp)(const void *, const void *));
 211 int count_refspec_match(const char *, struct ref *refs, struct ref **matched_ref);
 212 int ref_compare_name(const void *, const void *);
 213
 214 int check_ref_type(const struct ref *ref, int flags);
 215
 216 /*
 217  * Free a single ref and its peer, or an entire list of refs and their peers,
 218  * respectively.
 219  */
 220 void free_one_ref(struct ref *ref);
 221 void free_refs(struct ref *ref);
 222
 223 struct oid_array;
 224 struct packet_reader;
 225 struct strvec;
 226 struct string_list;
 227 struct ref **get_remote_heads(struct packet_reader *reader,
 228                               struct ref **list, unsigned int flags,
 229                               struct oid_array *extra_have,
 230                               struct oid_array *shallow_points);
 231
 232 /* Used for protocol v2 in order to retrieve refs from a remote */
 233 struct ref **get_remote_refs(int fd_out, struct packet_reader *reader,
 234                              struct ref **list, int for_push,
 235                              struct transport_ls_refs_options *transport_options,
 236                              const struct string_list *server_options,
 237                              int stateless_rpc);
 238
 239 int resolve_remote_symref(struct ref *ref, struct ref *list);
 240
 241 /*
 242  * Remove and free all but the first of any entries in the input list
 243  * that map the same remote reference to the same local reference.  If
 244  * there are two entries that map different remote references to the
 245  * same local reference, emit an error message and die.  Return a
 246  * pointer to the head of the resulting list.
 247  */
 248 struct ref *ref_remove_duplicates(struct ref *ref_map);
 249
 250 /*
 251  * Remove all entries in the input list which match any negative refspec in
 252  * the refspec list.
 253  */
 254 struct ref *apply_negative_refspecs(struct ref *ref_map, struct refspec *rs);
 255
 256 int query_refspecs(struct refspec *rs, struct refspec_item *query);
 257 char *apply_refspecs(struct refspec *rs, const char *name);
 258
 259 int check_push_refs(struct ref *src, struct refspec *rs);
 260 int match_push_refs(struct ref *src, struct ref **dst,
 261                     struct refspec *rs, int flags);
 262 void set_ref_status_for_push(struct ref *remote_refs, int send_mirror,
 263         int force_update);
 264
 265 /*
 266  * Given a list of the remote refs and the specification of things to
 267  * fetch, makes a (separate) list of the refs to fetch and the local
 268  * refs to store into. Note that negative refspecs are ignored here, and
 269  * should be handled separately.
 270  *
 271  * *tail is the pointer to the tail pointer of the list of results
 272  * beforehand, and will be set to the tail pointer of the list of
 273  * results afterward.
 274  *
 275  * missing_ok is usually false, but when we are adding branch.$name.merge
 276  * it is Ok if the branch is not at the remote anymore.
 277  */
 278 int get_fetch_map(const struct ref *remote_refs, const struct refspec_item *refspec,
 279                   struct ref ***tail, int missing_ok);
 280
 281 struct ref *get_remote_ref(const struct ref *remote_refs, const char *name);
 282
 283 /*
 284  * For the given remote, reads the refspec's src and sets the other fields.
 285  */
 286 int remote_find_tracking(struct remote *remote, struct refspec_item *refspec);
 287
 288 /**
 289  * struct branch holds the configuration for a branch. It can be looked up with
 290  * branch_get(name) for "refs/heads/{name}", or with branch_get(NULL) for HEAD.
 291  */
 292 struct branch {
 293         struct hashmap_entry ent;
 294
 295         /* The short name of the branch. */
 296         const char *name;
 297
 298         /* The full path for the branch ref. */
 299         const char *refname;
 300
 301         /* The name of the remote listed in the configuration. */
 302         const char *remote_name;
 303
 304         const char *pushremote_name;
 305
 306         /* An array of the "merge" lines in the configuration. */
 307         const char **merge_name;
 308
 309         /**
 310          * An array of the struct refspecs used for the merge lines. That is,
 311          * merge[i]->dst is a local tracking ref which should be merged into this
 312          * branch by default.
 313          */
 314         struct refspec_item **merge;
 315
 316         /* The number of merge configurations */
 317         int merge_nr;
 318
 319         int merge_alloc;
 320
 321         const char *push_tracking_ref;
 322 };
 323
 324 struct branch *branch_get(const char *name);
 325 const char *remote_for_branch(struct branch *branch, int *explicit);
 326 const char *pushremote_for_branch(struct branch *branch, int *explicit);
 327 const char *remote_ref_for_branch(struct branch *branch, int for_push);
 328
 329 /* returns true if the given branch has merge configuration given. */
 330 int branch_has_merge_config(struct branch *branch);
 331
 332 int branch_merge_matches(struct branch *, int n, const char *);
 333
 334 /**
 335  * Return the fully-qualified refname of the tracking branch for `branch`.
 336  * I.e., what "branch@{upstream}" would give you. Returns NULL if no
 337  * upstream is defined.
 338  *
 339  * If `err` is not NULL and no upstream is defined, a more specific error
 340  * message is recorded there (if the function does not return NULL, then
 341  * `err` is not touched).
 342  */
 343 const char *branch_get_upstream(struct branch *branch, struct strbuf *err);
 344
 345 /**
 346  * Return the tracking branch that corresponds to the ref we would push to
 347  * given a bare `git push` while `branch` is checked out.
 348  *
 349  * The return value and `err` conventions match those of `branch_get_upstream`.
 350  */
 351 const char *branch_get_push(struct branch *branch, struct strbuf *err);
 352
 353 /* Flags to match_refs. */
 354 enum match_refs_flags {
 355         MATCH_REFS_NONE         = 0,
 356         MATCH_REFS_ALL          = (1 << 0),
 357         MATCH_REFS_MIRROR       = (1 << 1),
 358         MATCH_REFS_PRUNE        = (1 << 2),
 359         MATCH_REFS_FOLLOW_TAGS  = (1 << 3)
 360 };
 361
 362 /* Flags for --ahead-behind option. */
 363 enum ahead_behind_flags {
 364         AHEAD_BEHIND_UNSPECIFIED = -1,
 365         AHEAD_BEHIND_QUICK       =  0,  /* just eq/neq reporting */
 366         AHEAD_BEHIND_FULL        =  1,  /* traditional a/b reporting */
 367 };
 368
 369 /* Reporting of tracking info */
 370 int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs,
 371                        const char **upstream_name, int for_push,
 372                        enum ahead_behind_flags abf);
 373 int format_tracking_info(struct branch *branch, struct strbuf *sb,
 374                          enum ahead_behind_flags abf);
 375
 376 struct ref *get_local_heads(void);
 377 /*
 378  * Find refs from a list which are likely to be pointed to by the given HEAD
 379  * ref. If 'all' is false, returns the most likely ref; otherwise, returns a
 380  * list of all candidate refs. If no match is found (or 'head' is NULL),
 381  * returns NULL. All returns are newly allocated and should be freed.
 382  */
 383 struct ref *guess_remote_head(const struct ref *head,
 384                               const struct ref *refs,
 385                               int all);
 386
 387 /* Return refs which no longer exist on remote */
 388 struct ref *get_stale_heads(struct refspec *rs, struct ref *fetch_map);
 389
 390 /*
 391  * Compare-and-swap
 392  */
 393 #define CAS_OPT_NAME "force-with-lease"
 394
 395 struct push_cas_option {
 396         unsigned use_tracking_for_rest:1;
 397         unsigned use_force_if_includes:1;
 398         struct push_cas {
 399                 struct object_id expect;
 400                 unsigned use_tracking:1;
 401                 char *refname;
 402         } *entry;
 403         int nr;
 404         int alloc;
 405 };
 406
 407 int parseopt_push_cas_option(const struct option *, const char *arg, int unset);
 408
 409 int is_empty_cas(const struct push_cas_option *);
 410 void apply_push_cas(struct push_cas_option *, struct remote *, struct ref *);
 411
 412 #endif