shortcut bash script to read a remote kubernetes secret and output to terminal

kube-get-secret.sh

#!/usr/bin/env bash

# works on OS X
# requires jq to be installed eg: `brew install jq`
# can be easily modified to run in linux or both linux and os x

set -euo pipefail
IFS=$'\n\t'

context="${1-}"
secret_name="${2-}"
key="${3-}"

if [ -z "$context" -o -z "$secret_name" -o -z "$key" ]; then
    echo "usage: $0 context secret_name key"
    echo "example: $0 gke_my-project_us-central1-a_production-1 env-my-application .env"
    exit 99
fi

kubectl --context="${context}" get secret "${secret_name}" -o json | jq -r ".data[\"${key}\"]" | base64 -D