quick aws assume-role based on configured profiles - requires https://github.com/junegunn/fzf and https://stedolan.github.io/jq/

.bashrc

function awsaroff {
    unset AWS_ACCESS_KEY_ID AWS_SECRET_ACCESS_KEY AWS_SESSION_TOKEN
    aws sts get-caller-identity
}

function awsar {
    unset AWS_ACCESS_KEY_ID AWS_SECRET_ACCESS_KEY AWS_SESSION_TOKEN
    local ARN="$(cat ~/.aws/config | grep "arn:aws" | awk -F " = " '{print $2};' | fzf)"
    echo "assuming role: ${ARN}"
    if [[ ! $1 ]]; then 
        local SESSIONNAME="$(whoami)"
    else 
        local SESSIONNAME=$1
    fi
    TEMPSESSION="$(aws sts assume-role --role-arn "$ARN" --role-session-name "$SESSIONNAME")"
    export AWS_ACCESS_KEY_ID="$(echo $TEMPSESSION | jq -r .Credentials.AccessKeyId)"
    export AWS_SECRET_ACCESS_KEY="$(echo $TEMPSESSION | jq -r .Credentials.SecretAccessKey)"
    export AWS_SESSION_TOKEN="$(echo $TEMPSESSION | jq -r .Credentials.SessionToken)"
    aws sts get-caller-identity
}