Tommy•6mo ago

Referencing environment variables from .env in deno compile or deno task commands

Is this possible? I can reference predefined env variables like PATH fine, but any env variables that are defined in .env seems out of reach by the Deno CLI.

5 Replies

Bhuwan•6mo ago

You can use —env-file —allow-env along with your deno command, this by default uses .env file but if it’s named different you can use —env-file=.env.prod —allow-env, hope this helps.

TommyOP•6mo ago

I tried this already but my environment variables turn out undefined

Moderpo•2mo ago

I have also found that making a deno task that sets up some env variables and then listing that task as a dependency, the variables will not be set when the second task runs.

Moderpo•2mo ago

also, if someone's looking for a hacky solution for this, read about env files in the documentation and change your command to load the env variables by running a script first and then executing the actual command. You can string commands together using &&. This will cause the second command to execute if and after the first successfully completes.

Deno

Environment variables

In-depth documentation, guides, and reference materials for building secure, high-performance JavaScript and TypeScript applications with Deno

Leokuma•2mo ago

This works for me on Linux: deno.json

{
  "tasks": {
    "print-env": "deno run -A --env-file print-env.ts"
  }
}

{
  "tasks": {
    "print-env": "deno run -A --env-file print-env.ts"
  }
}

.env

MY_VAR="THIS IS MY VAR"

MY_VAR="THIS IS MY VAR"

print-env.ts

console.log(Deno.env.get('MY_VAR'))

console.log(Deno.env.get('MY_VAR'))

$ deno task print-env
Task print-env deno run -A --env-file print-env.ts
THIS IS MY VAR

$ deno task print-env
Task print-env deno run -A --env-file print-env.ts
THIS IS MY VAR

Referencing environment variables from .env in deno compile or deno task commands

Did you find this page helpful?