public Planetiler addOsmSource(String name, Path defaultPath) {
    return addOsmSource(name, defaultPath, null);
  }
Adds a new {@code .osm.pbf} source that will be processed when {@link #run()} is called.
<p>
To override the location of the {@code .osm.pbf} file, set {@code name_path=newpath.osm.pbf} in the arguments.

@param name        string to use in stats and logs to identify this stage
@param defaultPath path to the input file to use if {@code name_path} argument is not set
@return this runner instance for chaining
@see OsmInputFile
@see OsmReader
planetiler-core/src/main/java/com/onthegomap/planetiler/Planetiler.java