$ gemmi drg -h
Usage:
 gemmi drg [options] INPUT.cif OUTPUT.cif
 gemmi drg [options] -o DIR INPUT1.cif INPUT2.cif ...

Fill missing restraint values (bonds, angles) in a monomer CIF file
using COD/CSD statistical data from AceDRG tables.
If OUTPUT.cif is -, the output is printed to stdout.
With -o, multiple input files are processed and written to DIR.

Options:
  -h, --help            Print usage and exit.
  -V, --version         Print version and exit.
  -v, --verbose         Verbose output.
  -t, --tables=DIR      Directory with AceDRG tables (default: $ACEDRG_TABLES
                                                                             
                    or $CCP4/share/acedrg/tables).
  -o, --output-dir=DIR  Output directory for batch processing.
  --sigma=NUM           Maximum sigma for bond restraints (default: 0.02).
  --timing              Print timing information.
  --style=STYLE         Output style: default, pdbx, aligned.
  --no-angles           Skip angle restraints (still keep bonds, torsions, chirals, planes).
  --coord-model=KIND    Coordinates to use from _chem_comp_atom:
                                                                             
                    xyz | example | ideal | first | auto (default: auto).
