dep: Go Bump github.com/open-policy-agent/opa from 0.51.0 to 0.55.0

[dependabot]

Bumps github.com/open-policy-agent/opa from 0.51.0 to 0.55.0.

Release notes

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

v0.55.0

NOTES:

• All published OPA images now run with a non-root uid/gid. The uid:gid is set to 1000:1000 for all images. As a result there is no longer a need for the -rootless image variant and hence it will be not be published as part of future releases. This change is in line with container security best practices. OPA can still be run with root privileges by explicitly setting the user, either with the --user argument for docker run, or by specifying the securityContext in the Kubernetes Pod specification.

• The minimum version of Go required to build the OPA module is 1.19

This release contains a mix of new features, bugfixes and a new builtin function.

Honor default keyword on functions

Previously if a function was defined with a default value, OPA would ignore it. Now the default function is honored if all functions with the same name are undefined. For example,

package example
default clamp_positive(_) := 0
clamp_positive(x) = x {
x > 0
}

$ opa eval -d example.rego 'data.example.clamp_positive(1)' -f pretty
1

$ opa eval -d example.rego 'data.example.clamp_positive(-1)' -f pretty
0

The value of a default function follows the same conditions as that of a default rule. In addition, a default function satisfies the following properties:

• same arity as other functions with the same name
• arguments should only be plain variables ie. no composite values
• argument names should not be repeated

NOTE:

default functions used to be previously ignored. If existing policies contain default functions, ensure that they conform to the properties mentioned above. Otherwise, those policies will fail to evaluate.

Authored by @​ashutosh-narkar.

... (truncated)

Changelog

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

0.55.0

NOTES:

• All published OPA images now run with a non-root uid/gid. The uid:gid is set to 1000:1000 for all images. As a result there is no longer a need for the -rootless image variant and hence it will be not be published as part of future releases. This change is in line with container security best practices. OPA can still be run with root privileges by explicitly setting the user, either with the --user argument for docker run, or by specifying the securityContext in the Kubernetes Pod specification.

• The minimum version of Go required to build the OPA module is 1.19

This release contains a mix of new features, bugfixes and a new builtin function.

Honor default keyword on functions

Previously if a function was defined with a default value, OPA would ignore it. Now the default function is honored if all functions with the same name are undefined. For example,

package example
default clamp_positive(x) := 0
clamp_positive(x) = x {
x > 0
}

$ opa eval -d example.rego 'data.example.clamp_positive(1)' -f pretty
1

$ opa eval -d example.rego 'data.example.clamp_positive(-1)' -f pretty
0

The value of a default function follows the same conditions as that of a default rule. In addition, a default function satisfies the following properties:

• same arity as other functions with the same name
• arguments should only be plain variables ie. no composite values
• argument names should not be repeated

NOTE:

default functions used to be previously ignored. If existing policies contain default functions, ensure that they conform to the properties mentioned above. Otherwise, those policies will fail to evaluate.

... (truncated)

Commits

• 4c21ddd Prepare v0.55.0 release (#6119)
• 1868d41 chore: Comment should with an optional leading article
• 49f5805 [docs] Brush up OPA profiling docs
• fe50e18 GitLab registry header auth
• 768dcd9 docs: Add a note about default functions
• c83f5b7 [docs] Fix bug for broken ecosystem links
• e57b6c7 [docs] Correct envoy tutorial mistake (#6107)
• 93c5abe build(deps): bump go.uber.org/automaxprocs from 1.5.2 to 1.5.3 (#6106)
• a996188 Update the standalone envoy tutorial (#6105)
• afcf014 topdown: Honor default keyword on functions
• Additional commits viewable in compare view

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[dependabot]

Superseded by #526.