I'm using a external library installed as devDependency that uses a node environment variable. How can I set it to be able this library get the value?
#Environment variables for external libraries
strong tapir
dusky orioleBOT
Hi @strong tapir. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:
You can set environment variables for your Astro project using a .env file. This file should be located in the root of your project. The environment variables you set in this file will be available to your project during the build process.
Here's an example of how you can set an environment variable in the .env file:
VARIABLE_NAME=your_value
Replace VARIABLE_NAME with the name of the environment variable your library needs, and your_value with the value you want to set for this variable.
If you want to use this environment variable during the build process, you need to provide Astro with every environment variable to expect at run-time. Here's how you can do it:
VARIABLE_NAME=placeholder astro build
This signals to Astro that the actual value will be available when the built application is run. The placeholder value will be ignored by the build process, and Astro will use the value provided at run-time.
If you have multiple run-time variables, you can store them in a separate file (e.g. .env.runtime) from .env. You can start the build with the following command:
export $(cat .env.runtime) && astro build
Please note that Astro evaluates configuration files before it loads your other files. As such, you can’t use import.meta.env to access environment variables that were set in .env files. You can use process.env in a configuration file to access other environment variables.
For more information, you can refer to the Astro documentation on environment variables (https://docs.astro.build/en/guides/environment-variables/).
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
strong tapir
@dusky oriole How can i do that in dev mode?
dusky orioleBOT
Let me check the knowledge base for you. One moment! :books:
To use environment variables in development mode, you can start the Astro development server with the environment variables defined in your .env file. Here's how you can do it:
- Define your environment variables in the
.envfile:
VARIABLE_NAME=your_value
Replace VARIABLE_NAME with the name of the environment variable your library needs, and your_value with the value you want to set for this variable.
- Start the Astro development server. You can do this by running one of the following commands in your terminal:
npm run dev
or
pnpm run dev
or
yarn run dev
Now, the environment variables you defined in the .env file should be available to your project in development mode.