Fish-Shell: Switch AWS environments

001_usage.md

Fish-Shell: Switch AWS environments

How to use

1. Set up the folder ~/.awsenv/ with the folder structure shown below
2. Create a credentials.txt for every environment folder (see an example below)
3. Ensure no other user than yourself can view those files
4. Create the function set_aws in ~/.config/fish/functions/set_aws.fish (see an example below)
5. Now load any environment using set_aws <environment> like set_aws private

File structure

luzifer@knut-workstation01 ~> tree .awsenv/
.awsenv/
├── clear
│   └── credentials.txt
├── company
│   └── credentials.txt
├── private
│   └── credentials.txt
└── setup.fish

3 directories, 4 files
luzifer@knut-workstation01 ~>

Why Fish-Shell?

Just because I'm using fish as my daily shell and want to continue to use it. But I'm quite sure you don't need much time to re-create this for other shells like zsh or bash too.

credentials.txt

AWSAccessKeyId=
AWSSecretKey=
AWSRegion=

set_aws.fish

function set_aws --description 'Set the AWS environment variables' --argument AWS_ENV
	source $HOME/.awsenv/setup.fish
end

setup.fish

set -gx AWS_CREDENTIAL_FILE $HOME/.awsenv/$AWS_ENV/credentials.txt

# CFN CLI
set -gx EC2_REGION (grep '^AWSRegion=' $AWS_CREDENTIAL_FILE | cut -d= -f2)
set -gx AWS_ACCESS_KEY (grep '^AWSAccessKeyId=' $AWS_CREDENTIAL_FILE | cut -d= -f2)
set -gx AWS_SECRET_KEY (grep '^AWSSecretKey=' $AWS_CREDENTIAL_FILE | cut -d= -f2)

# AWS CLI
set -gx AWS_DEFAULT_REGION $EC2_REGION
set -gx AWS_ACCESS_KEY_ID $AWS_ACCESS_KEY
set -gx AWS_SECRET_ACCESS_KEY $AWS_SECRET_KEY

I wrote a general purpose fish plugin for this a while back: https://github.com/joehillen/ev-fish