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   1 #ifndef MERGE_ORT_H
   2 #define MERGE_ORT_H
   3
   4 #include "merge-recursive.h"
   5
   6 struct commit;
   7 struct tree;
   8
   9 struct merge_result {
  10         /*
  11          * Whether the merge is clean; possible values:
  12          *    1: clean
  13          *    0: not clean (merge conflicts)
  14          *   <0: operation aborted prematurely.  (object database
  15          *       unreadable, disk full, etc.)  Worktree may be left in an
  16          *       inconsistent state if operation failed near the end.
  17          */
  18         int clean;
  19
  20         /*
  21          * Result of merge.  If !clean, represents what would go in worktree
  22          * (thus possibly including files containing conflict markers).
  23          */
  24         struct tree *tree;
  25
  26         /*
  27          * Additional metadata used by merge_switch_to_result() or future calls
  28          * to merge_incore_*().  Includes data needed to update the index (if
  29          * !clean) and to print "CONFLICT" messages.  Not for external use.
  30          */
  31         void *priv;
  32 };
  33
  34 /*
  35  * rename-detecting three-way merge with recursive ancestor consolidation.
  36  * working tree and index are untouched.
  37  *
  38  * merge_bases will be consumed (emptied) so make a copy if you need it.
  39  *
  40  * NOTE: empirically, the recursive algorithm will perform better if you
  41  *       pass the merge_bases in the order of oldest commit to the
  42  *       newest[1][2].
  43  *
  44  *       [1] https://lore.kernel.org/git/nycvar.QRO.7.76.6.1907252055500.21907@tvgsbejvaqbjf.bet/
  45  *       [2] commit 8918b0c9c2 ("merge-recur: try to merge older merge bases
  46  *           first", 2006-08-09)
  47  */
  48 void merge_incore_recursive(struct merge_options *opt,
  49                             struct commit_list *merge_bases,
  50                             struct commit *side1,
  51                             struct commit *side2,
  52                             struct merge_result *result);
  53
  54 /*
  55  * rename-detecting three-way merge, no recursion.
  56  * working tree and index are untouched.
  57  */
  58 void merge_incore_nonrecursive(struct merge_options *opt,
  59                                struct tree *merge_base,
  60                                struct tree *side1,
  61                                struct tree *side2,
  62                                struct merge_result *result);
  63
  64 /* Update the working tree and index from head to result after incore merge */
  65 void merge_switch_to_result(struct merge_options *opt,
  66                             struct tree *head,
  67                             struct merge_result *result,
  68                             int update_worktree_and_index,
  69                             int display_update_msgs);
  70
  71 /* Do needed cleanup when not calling merge_switch_to_result() */
  72 void merge_finalize(struct merge_options *opt,
  73                     struct merge_result *result);
  74
  75 #endif