install

Additional install commands

macOS

Homebrewverified · 100%

brew install gator

local Homebrew formula metadata

overview

Package summary

CLI Utility for Open Policy Agent Gatekeeper

Project links

Commands and aliases

gator

history

Project history and usage

gator is the command-line utility shipped by Open Policy Agent Gatekeeper for local Gatekeeper policy work. It lets users evaluate ConstraintTemplates and Constraints outside the cluster, and newer versions add policy-library management commands.

Project history

Gatekeeper's repository was created in 2018 as the Kubernetes admission-control project in the Open Policy Agent ecosystem. The README distinguishes modern Gatekeeper from earlier OPA sidecar and kube-mgmt usage, noting native Kubernetes CRDs, constraints, constraint templates, audit functionality, mutation, and external data support.

The gator CLI is documented as a Gatekeeper v3.11+ beta feature. The same official page notes that `go install` support requires Gatekeeper master or v3.16.0 and later, and that the `gator policy` subcommand is a v3.22+ alpha feature.

Adoption history

Official gator installation paths include downloading binaries from Gatekeeper releases, building from source, and installing with Homebrew on macOS and Linux. Its adoption is tied to Gatekeeper users who want to test or manage policies before applying them to Kubernetes clusters.

How it is used

`gator test` evaluates Kubernetes objects against templates and constraints and reports violations through both output and exit status. `gator policy` provides a brew-inspired interface for discovering, installing, upgrading, and managing policies from the official gatekeeper-library.

Why package nerds care

gator matters because it packages policy validation and policy-library workflows into a local CLI, making Gatekeeper policy development fit into package-manager, CI, and preflight-test workflows rather than only live-cluster admission control.

Timeline

2018: Gatekeeper repository created.
2019: v2.0.1 release published.
2023: v3.11.0 release line introduced the documented gator beta feature state.
2024: v3.16.0 became the documented minimum for `go install` of gator by version.
2026: v3.22.0 release line introduced the documented `gator policy` alpha feature state.

Related projects

gator is part of Open Policy Agent Gatekeeper and works with Gatekeeper ConstraintTemplates, Constraints, Kubernetes resources, and the official gatekeeper-library. The Gatekeeper README also relates the project to OPA with kube-mgmt.

Sources

security posture

Risk level: green

narrow executable package without higher-risk signals.

Risk classifier

green risk · low confidence · appliance

Why

narrow executable package without higher-risk signals

Signals

metadata:no-higher-risk-signals

Install behavior

No Homebrew post-install hook is recorded in formula metadata.
Homebrew bottle metadata is available for 6 platform targets.
Build metadata lists 1 build dependencies.

Recommended review

Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.

executables

Installed executables

Command	Kind	Exposure	Note
`gator`	cli	global executable

freshness

Version and freshness

These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.

page generated2026-07-08

manager version3.22.2

manager updated2026-04-28

local dataok

upstreamcurrent

latest detectedv3.22.2

https://github.com/open-policy-agent/gatekeeper

okNo freshness warnings were generated.

install metadata

Package metadata

Package key	brew:gator
Version	3.22.2
Package manager	Homebrew
Package manager page	https://formulae.brew.sh/formula/gator
Homepage	https://open-policy-agent.github.io/gatekeeper/
Repository	https://github.com/open-policy-agent/gatekeeper
Upstream docs	https://github.com/open-policy-agent/gatekeeper/tree/master/docs
License	Apache-2.0
Source archive	https://github.com/open-policy-agent/gatekeeper/archive/refs/tags/v3.22.2.tar.gz
Last updated	2026-04-28T02:15:45Z
Pulse	updated
Build dependencies	go
Bottle	available (on arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma, x86_64_linux)
Homebrew post-install	not defined
Service	none declared

registry facts

Source database details

Source Database	Homebrew formula API
Tap	homebrew/core
Full Name	gator
Version Scheme	0
Revision	0
Head Version	HEAD
Bottle Stable Root URL	https://ghcr.io/v2/homebrew/core
Deprecated	no
Disabled	no
Keg Only	no
URL Keys	head stable

package graph

Links come from deterministic package relationships, av.db category and tag curation, ecosystem matches, and package hub membership.

source trail

Generated from repository data

This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.

Combined YAML source

View the package source record on GitHub.

combined/gator.yml

Used sources

Geiger risk classifier
Nucleus package database
av.db category and tag curation
cross-ecosystem install command graph
curated package history
package relationship graph
package version freshness
package-page enrichment

Install gator with Homebrew