pyenvsubst

Substitutes the values of environment variables. Python version.

Features

• Fully compatible with envsubst
• Requires only Python itself and stdlib
• Supports POSIX syntax for default values
• Offers multiple quality-of-life features

Installation

Install the latest stable version via pip:

  pip install pyenvsubst

Install the latest development version via pip:

  pip install pip install pyenvsubst@git+https://github.com/Coacher/pyenvsubst.git

Usage

Substitute environment variables from STDIN, output to STDOUT:

  cat template.txt | pyenvsubst

Exclude specified environment variables from substitution, output to STDOUT:

  cat template.txt | pyenvsubst --exclude "$API_TOKEN"

Substitute environment variables from FOO.txt, output to BAR.txt:

  pyenvsubst --input=FOO.txt --output=BAR.txt