AWS environment config loader.

awsenv is a small binary that loads AWS environment variables for an AWS profile from ~/.aws/credentials - useful if you're regularly switching credentials and using tools like Vagrant. In addition to aws_access_key_id and aws_secret_access_key, it will also optionally load settings for aws_keyname and aws_keypath.

# install Go from https://golang.org/dl/
export GOPATH=$HOME/go
go get -u github.com/soniah/awsenv

This will automatically download, compile and install the awsenv executable to $GOPATH/bin.

Import variables into your environment by eval-ing a backticked call to awsenv.

eval `awsenv profile-name`

For example, if you had the following credential files:

% cat ~/.aws/credentials
[example1]
aws_access_key_id = DEADBEEFDEADBEEF
aws_secret_access_key = DEADBEEFDEADBEEF1vzfgefDEADBEEFDEADBEEF

% cat /var/tmp/credentials
[example2]
aws_access_key_id = DEADBEEFDEADBEEF
aws_secret_access_key = DEADBEEFDEADBEEF1vzfgefDEADBEEFDEADBEEF
aws_keyname = 'example2_key'
aws_keypath = "~/.ssh/example2.pem"

The following shell commands would import AWS variables into your environment:

% eval `awsenv example1`
% env | grep AWS
AWS_ACCESS_KEY_ID=DEADBEEFDEADBEEF
AWS_SECRET_ACCESS_KEY=DEADBEEFDEADBEEF1vzfgefDEADBEEFDEADBEEF

% eval `awsenv example2 -f /var/tmp/credentials -v`
AWS_ACCESS_KEY_ID=DEADBEEFDEADBEEF
AWS_SECRET_ACCESS_KEY=DEADBEEFDEADBEEF1vzfgefDEADBEEFDEADBEEF
AWS_KEYNAME=example2_key
AWS_KEYPATH=/Users/sonia/.ssh/example2.pem

In a Vagrantfile you could do:

override.ssh.username = "ubuntu"
aws.keypair_name = ENV['AWS_KEYNAME']
override.ssh.private_key_path = ENV['AWS_KEYPATH']

The accepted flags can be displayed using -h:

% awsenv -h
Usage:
  awsenv [OPTIONS] Profile

Application Options:
  -v, --verbose   Verbose output
  -f, --filename= Credentials file (~/.aws/credentials)

Help Options:
  -h, --help      Show this help message

Arguments:
  Profile

Contributions are welcome; here is an example workflow using hub.

1. go get github.com/soniah/awsenv
2. cd $GOPATH/src/github.com/soniah/awsenv
3. hub fork
4. git co -b dev (and write some code)
5. git push -u <your-github-username> dev
6. hub pull-request