Go CF Environment Package

Overview

cfenv is a package to assist you in writing Go apps that run on Cloud Foundry. It provides convenience functions and structures that map to Cloud Foundry environment variable primitives (http://docs.cloudfoundry.org/devguide/deploy-apps/environment-variable.html).

Requirements

Go 1.25 or later.

Usage

go get github.com/cloudfoundry-community/go-cfenv

package main

import (
	"fmt"

	"github.com/cloudfoundry-community/go-cfenv"
)

func main() {
	appEnv, _ := cfenv.Current()

	fmt.Println("ID:", appEnv.ID)
	fmt.Println("Index:", appEnv.Index)
	fmt.Println("Name:", appEnv.Name)
	fmt.Println("Host:", appEnv.Host)
	fmt.Println("Port:", appEnv.Port)
	fmt.Println("Version:", appEnv.Version)
	fmt.Println("Home:", appEnv.Home)
	fmt.Println("MemoryLimit:", appEnv.MemoryLimit)
	fmt.Println("WorkingDir:", appEnv.WorkingDir)
	fmt.Println("TempDir:", appEnv.TempDir)
	fmt.Println("User:", appEnv.User)
	fmt.Println("Services:", appEnv.Services)
}

File-based service bindings

Apps with the file-based-vcap-services feature enabled receive their bindings in the file named by VCAP_SERVICES_FILE_PATH rather than in VCAP_SERVICES, which Cloud Foundry then does not set at all. cfenv.Current reads whichever of the two the platform provides, so switching the feature on needs no application change beyond a version of this package that supports it.

The SERVICE_BINDING_ROOT form of RFC-0030 is not supported: those bindings follow the Kubernetes servicebinding.io layout, which has no faithful translation into the VCAP_SERVICES shape this package exposes.

Contributing

Pull requests welcomed. Please run make check and make audit before submitting.