Mastering Environment Variable Management in Laravel Vapor

Prerequisites

To follow this guide, you should be comfortable with the command-line interface (CLI), basic Laravel directory structures, and have the Vapor CLI installed and authenticated. Familiarity with the concept of a .env file for storing sensitive configuration is essential.

Key Libraries & Tools

• Vapor CLI: The primary tool for interacting with the Laravel Vapor platform via the terminal.
• AWS Lambda: The underlying compute service where Laravel Vapor injects your variables.
• CloudFront: Used for asset delivery; Laravel Vapor automatically manages the ASSET_URL for this service.

The Pull-Push Workflow

The most efficient way to manage variables is by pulling the remote configuration down to your local machine, editing it, and pushing it back up.

# Step 1: Download the environment file
vapor env:pull staging

This command creates a .env.staging file in your root directory. Open this file in your editor to add new keys. Once you finish editing, upload the changes:

# Step 2: Upload the changes
vapor env:push staging

Syntax and Validation

Syntax errors in your environment files can break your deployment. Laravel Vapor will attempt to parse your file during the push process. If you have values containing spaces, you must wrap them in double quotes.

# Incorrect: This will fail to parse
MAIL_FROM_NAME=Dev Harper

# Correct: Always quote strings with spaces
MAIL_FROM_NAME="Dev Harper"

Effecting Changes with Deployment

Pushing environment variables updates the configuration on the Laravel Vapor dashboard, but it does not live-update the running AWS Lambda functions. To apply these changes, you must trigger a new deployment.

vapor deploy staging

Tips & Gotchas

Always allow Laravel Vapor to delete the local .env.staging file after a successful push. Keeping these files locally poses a security risk. If you prefer a GUI, you can also manage these variables via the Laravel Vapor under the environment settings, though a redeploy is still mandatory for changes to take effect.