AST: rules with variables in ref missing attached annotations

[anderseknert]

Since a few releases back, rule-level annotations are now attached to the rules they annotate in the AST. However, this doesn't seem to be the case for any rule where a variable component is in the rule ref.

Given a rule like this:

# METADATA
# description: bug
bug[x] if x := 5

The annotation can be found under annotations:

  "annotations": [
    {
      "description": "bug",
      "scope": "rule"
    }
  ],

But not under the rule:

  "rules": [
    {
      "body": [
        {
          "index": 0,
          "terms": [
            {
              "type": "ref",
              "value": [
                {
                  "type": "var",
                  "value": "assign"
                }
              ]
            },
            {
              "type": "var",
              "value": "x"
            },
            {
              "type": "number",
              "value": 5
            }
          ]
        }
      ],
      "head": {
        "value": {
          "type": "boolean",
          "value": true
        },
        "ref": [
          {
            "type": "var",
            "value": "bug"
          },
          {
            "type": "var",
            "value": "x"
          }
        ]
      }
    }
  ],

[johanfylling]

The metadata is available to the rule at runtime, so this is likely a serialization issue.

package play

import rego.v1

# METADATA
# description: bug
bug[x] if x := rego.metadata.rule()

->

{
    "bug": {
        "{\"description\":\"bug\",\"scope\":\"rule\"}": true
    }
}

[anderseknert]

Available "to" the rule, but not available on the rule :)