**           -f|--force     Apply the patch even though there are unsaved
**                          changes in the current check-out.  Unsaved changes
**                          are reverted and permanently lost.
**           -n|--dry-run   Do nothing, but print what would have happened
**           -v|--verbose   Extra output explaining what happens
**
** > fossil patch diff [DIRECTORY] FILENAME
** > fossil patch gdiff [DIRECTORY] FILENAME
**
**       Show a human-readable diff for the patch.  All the usual
**       diff flags described at "fossil help diff" apply. With gdiff,
**       gdiff-command is used instead of internal diff logic.  In addition:
**
**           -f|--force     Continue trying to perform the diff even if
**                          baseline information is missing from the current
**                          repository
**
** > fossil patch push REMOTE-CHECKOUT
**

**
*/
void patch_cmd(void){
  const char *zCmd;
  size_t n;
  if( g.argc<3 ){
    patch_usage:
    usage("apply|create|diff|gdiff|pull|push|view");
  }
  zCmd = g.argv[2];
  n = strlen(zCmd);
  if( strncmp(zCmd, "apply", n)==0 ){
    char *zIn;
    unsigned flags = 0;
    if( find_option("dry-run","n",0) )  flags |= PATCH_DRYRUN;

    if( find_option("force","f",0) )    flags |= PATCH_FORCE;
    zOut = patch_find_patch_filename("create");
    verify_all_options();
    db_must_be_within_tree();
    patch_create(flags, zOut, stdout);
    fossil_free(zOut);
  }else
  if( (strncmp(zCmd, "diff", n)==0) || (strncmp(zCmd, "gdiff", n)==0) ){
    char *zIn;
    unsigned flags = 0;
    DiffConfig DCfg;

    if( find_option("tk",0,0)!=0 ){
      db_close(0);
      diff_tk("patch diff", 3);
      return;
    }

    db_find_and_open_repository(0, 0);
    if( find_option("force","f",0) )    flags |= PATCH_FORCE;
    verify_all_options();
    zIn = patch_find_patch_filename("apply");
    patch_attach(zIn, stdin);
    diff_options(&DCfg, zCmd[0]=='g', 0);
    patch_diff(flags, &DCfg);
    fossil_free(zIn);
  }else
  if( strncmp(zCmd, "pull", n)==0 ){
    FILE *pIn = 0;
    unsigned flags = 0;
    const char *zFossilCmd = find_option("fossilcmd",0,1);