**
**   --nochange | -n         Dryrun:  do not actually make any changes; just
**                           show what would have happened.
**
**   --case-sensitive BOOL   Overwrite the case-sensitive setting.  If false,
**                           files whose names differ only in case are taken
**                           to be the same file.
**
**   --force | -f            Force the merge even if it would be a no-op.
*/
void merge_cmd(void){
  int vid;              /* Current version "V" */
  int mid;              /* Version we are merging from "M" */
  int pid;              /* The pivot version - most recent common ancestor P */
  int detailFlag;       /* True if the --detail option is present */
  int pickFlag;         /* True if the --cherrypick option is present */
  int backoutFlag;      /* True if the --backout option is present */
  int nochangeFlag;     /* True if the --nochange or -n option is present */
  int forceFlag;        /* True if the --force or -f 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 nChng;            /* Number of file name changes */
  int *aChng;           /* An array of file name changes */
  int i;                /* Loop counter */
  int nConflict = 0;    /* Number of conflicts seen */

  undo_capture_command_line();
  detailFlag = find_option("detail",0,0)!=0;
  pickFlag = find_option("cherrypick",0,0)!=0;
  backoutFlag = find_option("backout",0,0)!=0;
  debugFlag = find_option("debug",0,0)!=0;
  zBinGlob = find_option("binary",0,1);
  nochangeFlag = find_option("nochange","n",0)!=0;
  forceFlag = find_option("force","f",0)!=0;
  zPivot = find_option("baseline",0,1);
  capture_case_sensitive_option();
  if( g.argc!=3 ){
    usage("VERSION");
  }
  db_must_be_within_tree();
  caseSensitive = filenames_are_case_sensitive();

  if( backoutFlag ){
    int t = pid;
    pid = mid;
    mid = t;
  }
  if( !is_a_version(pid) ){
    fossil_fatal("not a version: record #%d", pid);
  }
  if( !forceFlag && mid==pid ){
    fossil_print("Merge skipped because it is a no-op. "
                 " Use --force to override.\n");
    return;
  }
  if( detailFlag ){
    print_checkin_description(mid, 12, "merge-from:");
    print_checkin_description(pid, 12, "baseline:");
  }
  vfile_check_signature(vid, 1, 0);
  db_begin_transaction();