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Prerequisites

Before using the Manetu PolicyEngine, ensure you have the appropriate tools installed for your use case.

:::tip Most Users Don't Need Go If you install mpe via Homebrew or download a pre-built binary, you don't need Go installed. Go is only required if you're building from source or using the embedded Go library. :::

For All Users

Open Policy Agent (OPA)

OPA is required for the mpe lint command to validate Rego syntax.

Installation:

• macOS: brew install opa
• Linux/Windows: Download from OPA releases

Verify installation:

opa version
# Version: 0.60.0

For Go Developers

If you're building mpe from source or using the embedded Go library, you'll also need:

Go

Go 1.21 or later is required.

Installation:

• macOS: brew install go
• Linux: Follow Go installation instructions
• Windows: Download from go.dev/dl

Verify installation:

go version
# go version go1.21.0 darwin/arm64

Optional Tools

Make

Make is useful for running project tasks, but not strictly required.

• macOS: xcode-select --install
• Linux: apt-get install make or yum install make

golangci-lint / staticcheck

For development on the PolicyEngine itself:

go install github.com/golangci/golangci-lint/cmd/golangci-lint@latest
go install honnef.co/go/tools/cmd/staticcheck@latest

Verifying Your Environment

Run the commands relevant to your setup:

# All users - Check OPA
opa version

# Go developers - Check Go
go version

# Optional - Check Make
make --version