Fossil

  int forceFlag;        /* True if the --force or -f option is present */
  int forceMissingFlag; /* True if the --force-missing option is present */
  const char *zBinGlob; /* The value of --binary */
  const char *zPivot;   /* The value of --baseline */
  int debugFlag;        /* True if --debug is present */
  int nConflict = 0;    /* Number of conflicts seen */
  int nOverwrite = 0;   /* Number of unmanaged files overwritten */
  char vAncestor = 'p'; /* If P is an ancestor of V then 'p', else 'n' */
  Stmt q;


  /* Notation:
  **
  **      V     The current checkout
  **      M     The version being merged in

  if( !dryRunFlag ) undo_begin();
  if( load_vfile_from_rid(mid) && !forceMissingFlag ){
    fossil_fatal("missing content, unable to merge");
  }
  if( load_vfile_from_rid(pid) && !forceMissingFlag ){
    fossil_fatal("missing content, unable to merge");
  }
  if( zPivot ){
    vAncestor = db_exists(
      "WITH RECURSIVE ancestor(id) AS ("
      "  VALUES(%d)"
      "  UNION ALL"
      "  SELECT pid FROM plink, ancestor"
      "   WHERE cid=ancestor.id AND pid!=%d AND cid!=%d)"
      "SELECT 1 FROM ancestor WHERE id=%d LIMIT 1",
      vid, nid, pid, pid
    ) ? 'p' : 'n';
  }
  if( debugFlag ){
    char *z;
    z = db_text(0, "SELECT uuid FROM blob WHERE rid=%d", nid);
    fossil_print("N=%d %z\n", nid, z);
    z = db_text(0, "SELECT uuid FROM blob WHERE rid=%d", pid);
    fossil_print("P=%d %z\n", pid, z);
    z = db_text(0, "SELECT uuid FROM blob WHERE rid=%d", mid);

  add_renames("fnp", pid, nid, 0, debugFlag ? "N->P" : 0);
  add_renames("fnm", mid, nid, backoutFlag, debugFlag ? "N->M" : 0);

  /*
  ** Add files found in V
  */
  db_multi_exec(
    "UPDATE OR IGNORE fv SET fn=coalesce(fn%c,fnn) WHERE fn IS NULL;"
    "REPLACE INTO fv(fn,fnp,fnm,fnn,idv,ridv,islinkv,isexe,chnged)"
    " SELECT pathname, fnp, fnm, fnn, id, rid, islink, vf.isexe, vf.chnged"
    "   FROM vfile vf"
    "   LEFT JOIN fv ON fn=coalesce(origname,pathname)"
    "    AND rid>0 AND vf.chnged NOT IN (3,5)"
    "  WHERE vid=%d;",
    vAncestor, vid
  );

  /*
  ** Add files found in P
  */
  db_multi_exec(
    "UPDATE OR IGNORE fv SET fnp=coalesce(fnn,"

  UPDATE f1
  UPDATE f2
}

test_file_contents merge_renames-10-9 f1 "f2.1"
test_file_contents merge_renames-10-10 f2 "f1.1"

############################################
#  Test 11                                 #
#  Specifying a baseline                   #
############################################

test_setup

write_file f1 "line"
fossil add f1
fossil commit -m "add f1"

write_file f1 "line\nline2"
fossil commit -b b -m "edit f2" --tag p1

fossil mv --hard f1 f2
fossil commit -m "f1 -> f2"

write_file f2 "line\nline2\nline3"
fossil commit -m "edit f2" --tag p2

write_file f2 "line\nline2\nline3\nline4"
fossil commit -m "edit f2"

fossil update trunk
fossil merge --baseline p1 b
test_status_list merge_renames-11-1 $RESULT {
  MERGE f1
  RENAME f1 -> f2
}
test_file_contents merge_renames-11-2 f2 "line\nline3\nline4"
fossil revert
fossil merge --baseline p2 b
test_status_list merge_renames-11-3 $RESULT {MERGE f1}
test_file_contents merge_renames-11-4 f1 "line\nline4"

######################################
#
# Tests for troubles not specifically linked with renames but that I'd like to
# write:
#  [c26c63eb1b] - 'merge --backout' does not handle conflicts properly
#  [953031915f] - Lack of warning when overwriting extra files
#  [4df5f38f1e] - Troubles merging a file delete with a file change