assume-role.sh

#!/bin/bash
#
set -e
unset AWS_ACCESS_KEY_ID AWS_SECRET_ACCESS_KEY AWS_SESSION_TOKEN AWS_SECURITY_TOKEN

ROLEARN="${1}"
SESSIONNAME="sumething"

KST=$(aws2 sts assume-role --role-arn $ROLEARN \
                          --role-session-name $SESSIONNAME)

export AWS_ACCESS_KEY_ID=$(echo $KST | jq -r .Credentials.AccessKeyId)
export AWS_SECRET_ACCESS_KEY=$(echo $KST | jq -r .Credentials.SecretAccessKey)
export AWS_SESSION_TOKEN=$(echo $KST | jq -r .Credentials.SessionToken)