cli

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Published: Dec 19, 2013 License: Apache-2.0

README

Cloud Foundry CLI written in Go Build Status

Background

Project to rewrite the Cloud Foundry CLI tool using Go. This project should currently be considered alpha quality software and should not be used in production environments. If you need something more stable, please check out the RubyGem.

For a view on the current status of the project, check cftracker.

Cloning the repository

  1. Install Go brew install go --cross-compile-common
  2. Clone (Fork before hand for development).
  3. Run git submodule update --init --recursive

Downloading Edge

The latest binary builds are published to Amazon S3 buckets

Building

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

Development

NOTE: Currently only development on OSX 10.8 is supported

  1. Write a test.
  2. Run bin/test and watch test fail.
  3. Make test pass.
  4. Submit a pull request.

If you want to run the benchmark tests

./bin/go test -bench . -benchmem cf/...

Releasing

On linux: run bin/build-all

On mac: run bin/build-all-osx

This will create tgz files in the release folder.

Contributing

Rough overview of the architecture

The app (in src/cf/app/app.go) declares the list of available commands. Help and flags are defined there. It will instantiate a command, and run it using 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).

Repositories are injected into the command, so tests can inject a fake.

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

Repositories return a Domain Object and an ApiResponse object.

Domain objects are data structures related to Cloud Foundry (see src/cf/domain).

ApiResponse objects convey a variety of important error conditions (see src/cf/net/api_status).

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 command. Its tests include checking arguments, having requirements, and the actual command itself. You will 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.

In addition, command file and methods naming follows a CRUD like convention. For example, the Space resource includes commands such a CreateSpace, ListSpaces, 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 domain objects (i.e. creating Services and Service Instances within Cloud Foundry).

By convention, Repository methods return a Domain object and an ApiResponse. Domain objects are used in both Commands and Repositories to model Cloud Foundry data. ApiResponse objects are used to communicate application errors, runtime errors, whether the resource was found, etc. This convention provides a consistent method signature across repositories.

Directories

Path Synopsis
src
cf
code.google.com/p/go.net/dict
Package dict implements the Dictionary Server Protocol as defined in RFC 2229.
Package dict implements the Dictionary Server Protocol as defined in RFC 2229.
code.google.com/p/go.net/html
Package html implements an HTML5-compliant tokenizer and parser.
Package html implements an HTML5-compliant tokenizer and parser.
code.google.com/p/go.net/html/atom
Package atom provides integer codes (also known as atoms) for a fixed set of frequently occurring HTML strings: tag names and attribute keys such as "p" and "id".
Package atom provides integer codes (also known as atoms) for a fixed set of frequently occurring HTML strings: tag names and attribute keys such as "p" and "id".
code.google.com/p/go.net/html/charset
Package charset provides common text encodings for HTML documents.
Package charset provides common text encodings for HTML documents.
code.google.com/p/go.net/idna
Package idna implements IDNA2008 (Internationalized Domain Names for Applications), defined in RFC 5890, RFC 5891, RFC 5892, RFC 5893 and RFC 5894.
Package idna implements IDNA2008 (Internationalized Domain Names for Applications), defined in RFC 5890, RFC 5891, RFC 5892, RFC 5893 and RFC 5894.
code.google.com/p/go.net/ipv4
Package ipv4 implements IP-level socket options for the Internet Protocol version 4.
Package ipv4 implements IP-level socket options for the Internet Protocol version 4.
code.google.com/p/go.net/ipv6
Package ipv6 implements IP-level socket options for the Internet Protocol version 6.
Package ipv6 implements IP-level socket options for the Internet Protocol version 6.
code.google.com/p/go.net/netutil
Package netutil provides network utility functions, complementing the more common ones in the net package.
Package netutil provides network utility functions, complementing the more common ones in the net package.
code.google.com/p/go.net/proxy
Package proxy provides support for a variety of protocols to proxy network data.
Package proxy provides support for a variety of protocols to proxy network data.
code.google.com/p/go.net/publicsuffix
Package publicsuffix provides a public suffix list based on data from http://publicsuffix.org/.
Package publicsuffix provides a public suffix list based on data from http://publicsuffix.org/.
code.google.com/p/go.net/spdy
Package spdy implements the SPDY protocol (currently SPDY/3), described in http://www.chromium.org/spdy/spdy-protocol/spdy-protocol-draft3.
Package spdy implements the SPDY protocol (currently SPDY/3), described in http://www.chromium.org/spdy/spdy-protocol/spdy-protocol-draft3.
code.google.com/p/go.net/websocket
Package websocket implements a client and server for the WebSocket protocol as specified in RFC 6455.
Package websocket implements a client and server for the WebSocket protocol as specified in RFC 6455.
launchpad.net/goyaml
Package goyaml implements YAML support for the Go language.
Package goyaml implements YAML support for the Go language.

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