Working with the Panther repo


You can use the Docker environment from the quick start instructions for development as well! However, it's faster to compile and test the code if you install the development tools locally.

Manual Installation

Install Go 1.13+, Node 10+, and Python 3.7+. For MacOS w/ homebrew, this is easy: brew install go node python3

Add go tools to your environment: export GOPATH=$HOME/go PATH=$PATH:$GOPATH/bin

Install the AWS CLI, which usually works best with the bundled installer:

curl "" -o ""
sudo ./awscli-bundle/install -i /usr/local/aws -b /usr/local/bin/aws

Install Docker and make sure the daemon is running in the background.

Install Mage: go get

Finally, install the remaining development libraries with mage setup:all


Panther uses mage, a Go tool similar to make , to manage the development lifecycle.

Run mage from the repo root to see the list of available commands:

build:api Generate Go client/models from Swagger specs in api/
build:lambda Compile Go Lambda function source
clean Remove auto-generated build artifacts
deploy Deploy application infrastructure
fmt Format source files
glue:sync Sync glue table partitions after schema change
setup:all Install all development dependencies
setup:go Install goimports, go-swagger, and golangci-lint
setup:python Install the Python virtual env
setup:web Npm install
test:cfn Lint CloudFormation templates
test:ci Run all required checks
test:cover Run Go unit tests and view test coverage in HTML
test:go Test Go source
test:integration Run integration tests (integration_test.go,
test:python Test Python source
test:web Lint web source

You can easily chain mage commands together, for example: mage fmt test:ci deploy


  1. Run backend test suite: mage test:ci

  2. Run frontend test suite: npm run lint

  3. Run integration tests against a live deployment: mage test:integration

    • WARNING: integration tests will erase all Panther data stores

    • To run tests for only one package: PKG=./internal/compliance/compliance-api/main mage test:integration


To update your deployment of Panther, follow the steps below:

  1. Checkout the latest release:

    1. git fetch origin master

    2. git checkout tags/v0.2.0

  2. Clean the existing build artifacts: mage clean

  3. Deploy the latest application changes: mage deploy

Repo Layout

Since the majority of Panther is written in Go, the repo follows the standard Go project layout:

  • api: input/output models for communicating with Panther's backend APIs

  • deployments: CloudFormation templates for deploying Panther itself or integrating the accounts you want to scan

  • docs: License headers, README images, code of conduct, etc

  • internal: Source code for all of Panther's Lambda functions

  • pkg: Standalone Go libraries that could be directly imported by other projects

  • tools: Magefile source and other build infrastructure

  • web: Source for the Panther web application