envstamp

Make docker containers easily configurable with environment variables

This was built to make it easier to modify config files in a docker image using environment variables

Install

sudo curl -L -o /bin/envstamp https://github.com/jamrizzi/envstamp/releases/download/v0.2.0/envstamp
sudo chmod +x /bin/envstamp

Build

git clone https://github.com/jamrizzi/envstamp.git
make build

Usage

Assume you have the following template at /my/custom/template.txt

Hello ${WOLRD}

Run the following . . .

export WOLRD=galaxy
envstamp /my/custom/template.txt

All environment variables have been replaced in /my/custom/template.txt

cat /my/custom/template.txt

# Hello galaxy

To set a default value when an environment variable does not exist, use the following syntax

Hello ${WORLD:universe}