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Cloud Foundry CLI Build Status

This is the official command line client for Cloud Foundry. cf v6.0.2 is the current supported release.

Stable Release (v6.0.2)



Edge Releases (master)

Edge binaries are published to our Amazon S3 bucket with each new commit that passes CI. These binaries are not intended for wider use, but for developers to test new features and fixes as they are completed:

You can follow our development progress on Pivotal Tracker.

Troubleshooting / FAQs


Mac OS X

  • "Illegal instruction: 4" - This is a known defect with some versions of OS X. Please file an issue. As a workaround, you can build from source or use homebrew.

Filing Bugs

For simple bugs (eg: text formatting, help messages, etc), please provide
  • the command you ran
  • what occurred
  • what you expected to occur
For bugs related to HTTP requests or strange behavior, please run the command with env var CF_TRACE=true and provide
  • the command you ran
  • the trace output
  • a high-level description of the bug
For panics and other crashes, please provide
  • the command you ran
  • the stack trace generated (if any)
  • any other relevant information

Cloning the repository

  1. Install Go
  2. Clone (Forking beforehand for development).
  3. Run git submodule update --init --recursive


  1. Run ./bin/build
  2. The binary will be built into the ./out directory.

Optionally, you can use bin/run to compile and run the executable in one step.


  1. Install Mercurial
  2. Run go get
  3. Write a Ginkgo test.
  4. Run bin/test and watch the test fail.
  5. Make the test pass.
  6. Submit a pull request.


Architecture overview

The app (in src/cf/app/app.go) declares the list of available commands, which are composed of a Name, Description, Usage and any optional Flags. The action for each command is to instantiate a command object, which is invoked by the runner (in src/cf/commands/runner.go).

A command has Requirements, and a Run function. Requirements are used as filters before running the command. If any of them fails, the command will not run (see src/cf/requirements for examples of requirements).

When the command is run, it communicates with api using repositories (they are in src/cf/api).

Dependencies are injected into each command, so tests can inject a fake. This means that dependencies are typically declared as an interface type, and not a concrete type. (see src/cf/commands/factory.go)

Some dependencies are managed by a repository locator in src/cf/api/repository_locator.go.

Repositories communicate with the api endpoints through a Gateway (see src/cf/net).

Models are data structures related to Cloud Foundry (see src/cf/models). For example, some models are apps, buildpacks, domains, etc.

Managing dependencies

Command dependencies are managed by the commands factory. The app uses the command factory (in src/cf/commands/factory.go) to instantiate them, this allows not sharing the knowledge of their dependencies with the app itself.

As for repositories, we use the repository locator to handle their dependencies. You can find it in src/cf/api/repository_locator.go.

Example command

Create Space is a good example of a command. Its tests include checking arguments, requiring the user to be logged in, and the actual behavior of the command itself. You can find it in src/cf/commands/space/create_space.go.

Current conventions

Creating Commands

Resources that include several commands have been broken out into their own sub-package using the Resource name. An example of this convention is the Space resource and package (see src/cf/commands/space)

In addition, command file and methods naming follows a CRUD like convention. For example, the Space resource includes commands such a CreateSpace, ListSpaces, DeleteSpace, etc.

Creating Repositories

Although not ideal, we use the name "Repository" for API related operations as opposed to "Service". Repository was chosen to avoid confusion with Service model objects (i.e. creating Services and Service Instances within Cloud Foundry).

By convention, Repository methods return a model object and an error. Models are used in both Commands and Repositories to model Cloud Foundry data. This convention provides a consistent method signature across repositories.


A CLI for Cloud Foundry written in Go







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