envsubst API

Environment variable substitution.

Import

import { envsubst } from "rhdh-e2e-test-utils/utils";

envsubst()

function envsubst(template: string): string

Replace environment variable placeholders in a string.

Parameter	Type	Description
template	string	Template with placeholders

Returns: String with substituted values.

Syntax

Pattern	Description
$VAR	Simple substitution
${VAR}	Braced substitution
${VAR:-default}	Default if unset

Example

import { envsubst } from "rhdh-e2e-test-utils/utils";

process.env.API_URL = "https://api.example.com";

// Simple
const result = envsubst("URL: $API_URL");
// "URL: https://api.example.com"

// With default
const result2 = envsubst("Port: ${PORT:-8080}");
// "Port: 8080" (if PORT not set)