envsub

WIP

CLI tool designed to simplify the process of placeholder replacement in text files. It's similar to envsubst in that it is primarily used for injecting environment variables into configuration files.

Getting started

Installation

TODO

Usage

apiVersion: v1
kind: Pod
metadata:
  name: nginx
spec:
  containers:
  - image: nginx:${NGINX_VERSION}
    name: nginx
    ports:
    - containerPort: ${PORT | default(80)}
    restartPolicy: Never

NGINX_VERSION=1.23.4 envsub < manifest.yaml

apiVersion: v1
kind: Pod
metadata:
  name: nginx
spec:
  containers:
  - image: nginx:1.23.4
    name: nginx
    ports:
    - containerPort: 80
    restartPolicy: Never

Filters

Filter	Description
default(value)	Replaces the input with the default value if the input is empty.
lowercase	Transforms the characters in the input to lower case.
trim	Removes whitespace from the start and end of the input.
uppercase	Transforms the characters in the input to upper case.

License

© 2019 Daniel Morris
Made available under the terms of the Apache License 2.0.