When running policy you see error: Undefined body. For example:

cf-promises -f ./large-files.cf: ./large-files.cf:14:0: error: Undefined body tidy with type delete ./large-files.cf:16:0: error: Undefined body recurse with type depth_search

The above errors indicate that the tidy and recurse bodies are not found in inputs. Bodies and bundles must either be defined within the same policy file or included from body common control inputs or body file control inputs.

Example: Add stdlib via body common control

code
body common control
{
        bundlesequence => { "file_remover" };
        inputs => { "$(sys.libdir)/stdlib.cf" };
}

Example: Add stdlib via body file control

Body file control allows you to build modular policy. Body file control inputs are typically relative to the policy file itself.

code
bundle file_remover_control
{
  vars:
    "inputs" slist => {
                        "$(sys.libdir)/stdlib.cf",
                        "$(this.promise_dirname)/custom_policy.cf",
                      };
}
body file control
{
  inputs => { @(file_remover_control.inputs) };
}

Tip: Locate bodies or bundles with cf-locate

cf-locate is a small utility that makes searching for and referencing body or bundle definitions quick and easy. Simply download the utility from core/contrib/cf-locate into your $PATH and make it executable.

Find which policy file a bundle or body is defined in:

code
[root@hub ~]# cf-locate always

-> body or bundle matching 'always' found in /var/cfengine/masterfiles/lib/3.6/common.cf:260
body classes always(x)

Reference a bundle or bodies full implementation:

code
[root@hub ~]# cf-locate -f always /var/cfengine/masterfiles

-> body or bundle matching 'always' found in /var/cfengine/masterfiles/lib/3.6/common.cf:260
body classes always(x)
# Define a class no matter what the outcome of the promise is

{
      promise_repaired => { "$(x)" };
      promise_kept => { "$(x)" };
      repair_failed => { "$(x)" };
      repair_denied => { "$(x)" };
      repair_timeout => { "$(x)" };
}