netlify-plugin-contextual-env

This plugin swaps out ENV vars on Netlify at build time. Here's how it works:

Say you have an ENV in your API code called DATABASE_URL. If you use this plugin, you'll be able to override that value based on a Context or Branch name.

For example:

• A staging branch, would automatically set DATABASE_URL to the value of STAGING_DATABASE_URL if it exists.
• A production context would automatically set DATABASE_URL to the value of PRODUCTION_DATABASE_URL if it exists.
• A deploy-preview context (used for Pull Requests) would automatically set DATABASE_URL to the value of DEPLOY_PREVIEW_DATABASE_URL if it exists.

This allows you to have per-environment or per-context environment variables, without exposing those variables in your netlify.toml config.

If you'd rather use a suffix rather than the default prefix configuration, pass suffix to the inputs below.

For the examples above, it would use the values DATABASE_URL_STAGING, DATABASE_URL_PRODUCTION, and DATABASE_URL_DEPLOY_PREVIEW respectively.

Usage

Add the plugin

Add a [[plugins]] entry to your netlify.toml file:

[[plugins]]
package = 'netlify-plugin-contextual-env'
  [plugins.inputs]
  mode = 'prefix'

| name | description | default | | ------ | ------------------------------------------------------------------- | -------- | | mode | The way to append the context or branch name (prefix or suffix) | prefix |