Sourced from github.com/open-policy-agent/opa's releases.

v0.57.0

This release contains an updated Rego syntax to allow general references in rule heads, and a mix of new features and bugfixes.

Support for General References in Rule Heads

In OPA 0.56.0, we introduced support for general references in rule heads as an experimental feature. It has now graduated to a fully supported feature, and is no longer experimental.

A general reference is a reference with variables at arbitrary locations. In Rego, partial rules are used for generating sets and objects. In previous versions of OPA, variables were only allowed in the very last position in the rule's reference. Now, Rego has been expanded to allow rules to be declared with general references in their head, with variables at arbitrary locations. This allows for generating nested dynamic object structures:

package example
import future.keywords
Converting a flat list of users to a mapping by "role" and then "id".
users_by_role[role][id] := user if {
some user in data.users
id := user.id
role := user.role
}
Explicit "admin" key override to the above mapping.
users_by_role.admin[id] := user if {
some user in data.admins
id := user.id
}
Leaf entries can be multi-value.
users_by_country[country] contains user.id if {
some user in data.users
country := user.country
}

See the documentation for more information.

Authored by @​johanfylling.

Runtime, Tooling, SDK

• ast/runtime: Extend type checking for authz policies (#6213) authored by @​ashutosh-narkar
• server: Add test case for bundle update - query API handler scenario (#4792) authored by @​ashutosh-narkar

Topdown and Rego

... (truncated)

Sourced from github.com/open-policy-agent/opa's changelog.

0.57.0

This release contains an updated Rego syntax to allow general references in rule heads, and a mix of new features and bugfixes.

Support for General References in Rule Heads

In OPA 0.56.0, we introduced support for general references in rule heads as an experimental feature. It has now graduated to a fully supported feature, and is no longer experimental.

A general reference is a reference with variables at arbitrary locations. In Rego, partial rules are used for generating sets and objects. In previous versions of OPA, variables were only allowed in the very last position in the rule's reference. Now, Rego has been expanded to allow rules to be declared with general references in their head, with variables at arbitrary locations. This allows for generating nested dynamic object structures:

package example
import future.keywords
Converting a flat list of users to a mapping by "role" and then "id".
users_by_role[role][id] := user if {
some user in data.users
id := user.id
role := user.role
}
Explicit "admin" key override to the above mapping.
users_by_role.admin[id] := user if {
some user in data.admins
id := user.id
}
Leaf entries can be multi-value.
users_by_country[country] contains user.id if {
some user in data.users
country := user.country
}

See the documentation for more information.

Authored by @​johanfylling.

Runtime, Tooling, SDK

• ast/runtime: Extend type checking for authz policies (#6213) authored by @​ashutosh-narkar
• server: Add test case for bundle update - query API handler scenario (#4792) authored by @​ashutosh-narkar

Topdown and Rego

... (truncated)

• c2f42aa Prepare v0.57.0 release (#6256)
• c36a605 docs: Documenting general refs in rule heads (#6244)
• 974586e server: Add test case for bundle update - query API handler scenario
• c5314e3 Removing EXPERIMENTAL_GENERAL_RULE_REFS feature flag (#6252)
• c9d1a8d planner: Adding support for general ref rule heads (#6235)
• 391cb0c Add rego-cpp to OPA Ecosystem
• 83a295f [docs] Use links on support page (#6249)
• 919b290 plugins: Surface AWS authentication error details
• 276702f Updating all vars in rule ref
• b07e60a nightly: skip Fri/Sat night (#6242)
• Additional commits viewable in compare view

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