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Simple AWS environment manager (aka rbenv for aws)

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Simple AWS Environment Management

awsenv lets you easily switch between multiple AWS environments. It's simple, unobtrusive, and follows the UNIX tradition of single-purpose tool that do one thing well.

awsenv is heavily inspired by rbenv from sstephenson.

How it works

awsenv operates on the per-user directory ~/.awsenv. Environments in awsenv correspond to subdirectories of ~/.awsenv/envs. For example, you might have ~/.awsenv/envs/acme-corporation and ~/.awsenv/envs/private.

Installation

Basic checkout

  1. Check out awsenv into ~/.awsenv.

     $ git clone git://github.com/michaelcontento/awsenv.git "$HOME/.awsenv"
    
  2. Add ~/.awsenv/bin to your $PATH for access to the awsenv command-line utility.

     $ echo 'export PATH="$HOME/.awsenv/bin:$PATH"' >> ~/.bash_profile
    

    Zsh note: Modify your ~/.zshenv file instead of ~/.bash_profile.

  3. Add awsenv init to your shell to load the default environment.

     $ echo 'eval "$(awsenv init -)"' >> ~/.bash_profile
    

    Zsh note: Modify your ~/.zshenv file instead of ~/.bash_profile.

  4. Restart your shell so the path changes take effect. You can now begin using awsenv.

     $ exec $SHELL
    

Upgrading

If you've installed awsenv using the instructions above, you can upgrade your installation at any time using git.

To upgrade to the latest development version of awsenv, use git pull:

$ cd ~/.awsenv
$ git pull

Or use the builtin update command:

$ awsenv update

To upgrade to a specific release of awsenv, check out the corresponding tag:

$ cd ~/.awsenv
$ git fetch
$ git tag
0.1.0
0.2.0
$ git checkout 0.2.0

Usage

Like git, the awsenv command delegates to subcommands based on its first argument. The most common subcommands are:

awsenv init

This is the only command that will modify your current shell. Here is what this command does:

  1. Exposes the usage of awsenv to the world with the variables described below
  2. Configures various variables required by the AWS tools:
    • Credential variables (e.g. AWS_CREDENTIAL_FILE)
    • Variables regarding the used identity file (e.g. AWS_IDENTITY_FILE)
    • Try to define JAVA_HOME, if not already set
  3. Add the used identity file to the ssh-agent

Run awsenv init - for yourself to see exactly what happens under the hood.

The special name - tells awsenv to use the environment selected with awsenv use previously.

awsenv expose it's presence to the outside world with the following variables:

  • AWSENV_LOADED=1 indicates that awsenv is loaded properly
  • AWSENV_NAME contains the name of the currently used environment

awsenv use

Set the global environment name to be used in all shells by writing the name to the ~/.awsenv/default file.

$ awsenv use acme-corporation

All environments are stored as seperate directory in ~/.awsenv/env.

awsenv list

Display a list of all currently installed environments.

$ awsenv list

awsenv import

This command helps you to import environments into awsenv. Just read the help of this command, checkout the awsenv-example-env repository and you should be able to setup all required files without any problems.

$ awsenv import git git://github.com/michaelcontento/awsenv-example-env.git example

Currently only environments stored as Git repository are supported. But you can help to expand this list by simply creating a new executable named awsenv-import-<TYPE>. Pull requests are welcome!

Development

The awsenv source code is hosted on GitHub. It's clean, modular, and easy to understand, even if you're not a shell hacker.

Please feel free to submit pull requests and file bugs on the issue tracker.

License

Copyright 2009-2012 Michael Contento <[email protected]>

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

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