Open Policy Agent - v0.64.0

NOTES:

• The minimum version of Go required to build the OPA module is 1.21

This release contains a mix of features, a new builtin function (json.marshal_with_options()), performance improvements, and bugfixes.

Breaking Change

Bootstrap configuration overrides Discovered configuration

Previously if Discovery was enabled, other features like bundle downloading and status reporting could not be configured manually.
The reason for this was to prevent OPAs being deployed that could not be controlled through discovery. It's possible that
the system serving the discovered config is unaware of all options locally available in OPA. Hence, we relax the configuration
check when discovery is enabled so that the bootstrap configuration can contain plugin configurations. In case of conflicts,
the bootstrap configuration for plugins wins. These local configuration overrides from the bootstrap configuration are included
in the Status API messages so that management systems can get visibility into the local overrides.

In general, the bootstrap configuration overrides the discovered configuration. Previously this was not the case for all
configuration fields. For example, if the discovered configuration changes the labels section, only labels that are
additional compared to the bootstrap configuration are used, all other changes are ignored. This implies labels in the
bootstrap configuration override those in the discovered configuration. But for fields such as default_decision, default_authorization_decision,
nd_builtin_cache, the discovered configuration would override the bootstrap configuration. Now the behavior is more consistent
for the entire configuration and helps to avoid accidental configuration errors. (#5722) authored by @ashutosh-narkar

Add rego_version attribute to the bundle manifest

A new global rego_version attribute is added to the bundle manifest, to inform the OPA runtime about what Rego version (v0/v1) to
use while parsing/compiling contained Rego files. There is also a new file_rego_versions attribute which allows individual
files to override the global Rego version specified by rego_version.

When the version of the contained Rego is advertised by the bundle through this attribute, it is not required to run OPA with the
--v1-compatible (or future --v0-compatible) flag in order to correctly parse, compile and evaluate the bundle's modules.

A bundle's rego_version attribute takes precedence over any applied --v1-compatible/--v0-compatible flag. (#6578) authored by @johanfylling

Runtime, Tooling, SDK

• compile: Fix panic from CLI + metadata entrypoint overlaps. The panic occurs when opa build was provided an entrypoint from both a CLI flag, and via entrypoint metadata annotation. (#6661) authored by @philipaconrad
• cmd/deps: Improve memory footprint and execution time of deps command for policies with high dependency connectivity (#6685) authored by @johanfylling
• server: Keep default decision path in-sync with manager's config (#6697) authored by @ashutosh-narkar
• server: Remove unnecessary AST-to-JSON conversions (#6665) and (#6669) authored by @koponen-styra
• sdk: Allow customizations of the plugin manager via SDK (#6662) authored by @xico42
• sdk: Fix issue where active parser options aren't propagated to module reload during bundle activation resulting in errors while activating bundles with v1 syntax (#6689) authored by @xico42
• plugins/rest: Close response body in OAuth2 client credentials flow (#6708) authored by @johanneslarsson

Topdown and Rego

• ast: Import rego.v1 in v0 support modules when applicable (#6450) authored by @johanfylling
• rego: Set query Rego version from configured imports (#6701) authored by @johanfylling
• topdown: New json.marshal_with_options() builtin for indented/"pretty-printed" and/or line-prefixed JSON (#6630) authored by @sean-r-williams

Docs, Website, Ecosystem

• Add Raygun to ecosystem projects (#6712) authored by @johndbro1
• Add env0 to ecosystem projects (#6658) authored by @yarivg
• Add Rego Language Comparisons to ecosystem projects (#6663) authored by @charlieegan3
• docs/configuration: Tidy up headers in Services section (#6695) authored by @tsandall
• docs: Use cuboid rather than cube to explain concepts of sets and composite values in policy-language section of documentation (#6691) authored by @kd-labs

Miscellaneous

• go.{mod,sum}: Update the go stanza of OPA's go.mod to go 1.21. OPA, used as Go dependency, requires at least go 1.21, and thus works with all officially supported Go versions (1.21.x and 1.22.x) (#6678) authored by @srenatus
• ci: Update Github Actions for Node 20. This change updates the upload-artifact and download-artifact Github actions to the latest version (v4) (#6670) authored by @philipaconrad
• build: Update WASM Rego test generation docker command to address CVE-2022-24765 in Git (#6703) authored by @ashutosh-narkar
• Dependency updates; notably:
• build(go): bump 1.22.1 -> 1.22.2 (#6672) authored by @srenatus
• build(deps): bump aquasecurity/trivy-action from 0.18.0 to 0.19.0
• build(deps): bump github.com/containerd/containerd from 1.7.14 to 1.7.15
• build(deps): bump github.com/prometheus/client_model from 0.5.0 to 0.6.1
• build(deps): bump golang.org/x/net from 0.22.0 to 0.24.0
• build(deps): bump google.golang.org/grpc from 1.62.1 to 1.63.2