code: def _install_container_bcbio_system(datadir):
      
      base_file = os.path.join(datadir, "config", "bcbio_system.yaml")
      if not os.path.exists(base_file):
          return
      expose_file = os.path.join(datadir, "galaxy", "bcbio_system.yaml")
      expose = set(["memory", "cores", "jvm_opts"])
      with open(base_file) as in_handle:
          config = yaml.safe_load(in_handle)
      if os.path.exists(expose_file):
          with open(expose_file) as in_handle:
              expose_config = yaml.safe_load(in_handle)
      else:
          expose_config = {"resources": {}}
      for pname, vals in config["resources"].items():
          expose_vals = {}
          for k, v in vals.items():
              if k in expose:
                  expose_vals[k] = v
          if len(expose_vals) > 0 and pname not in expose_config["resources"]:
              expose_config["resources"][pname] = expose_vals
      if expose_file and os.path.exists(os.path.dirname(expose_file)):
          with open(expose_file, "w") as out_handle:
              yaml.safe_dump(expose_config, out_handle, default_flow_style=False, allow_unicode=False)
      return expose_file
docs: Install limited bcbio_system.yaml file for setting core and memory usage.
  
      Adds any non-specific programs to the exposed bcbio_system.yaml file, only
      when upgrade happening inside a docker container.