envreplace

Searches through files and replaces references to environment variables with the value of the named environment variable.

I use this to replace environment variables in config files at Docker container startup.

Example

Given a file test.file:

My File with an ${env.ENV_VAR}

And a variable set in the shell:

export ENV_VAR='environment variable'

You could run:

envreplace test.file

And test.file would be changed to:

My File with an environment variable

Installation

npm install -g envreplace

Features:

• Supports specifying your own format for the regular expression that finds env var matches
• Allows use of node.js file globbing
• Verbose mode that logs all replacements
• Option to fail on missing variables

CLI Documentation

envreplace --help