Env Precedence (#1038)

WARNING

All experimental features are subject to breaking changes and/or removal at any time. We strongly recommend that you do not use these features in a production environment. They are intended for testing and feedback only.

DANGER

This experiment breaks the following functionality:

• environment variable will take precedence over OS environment variables

INFO

To enable this experiment, set the environment variable: TASK_X_ENV_PRECEDENCE=1. Check out our guide to enabling experiments for more information.

Before this experiment, the OS variable took precedence over the task environment variable. This experiment changes the precedence to make the task environment variable take precedence over the OS variable.

Consider the following example:

version: '3'

tasks:
  default:
    env:
      KEY: 'other'
    cmds:
      - echo "$KEY"

Running KEY=some task before this experiment, the output would be some, but after this experiment, the output would be other.

If you still want to get the OS variable, you can use the template function env like follow : {{env "OS_VAR"}}.

version: '3'

tasks:
  default:
    env:
      KEY: 'other'
    cmds:
      - echo "$KEY"
      - echo {{env "KEY"}}

Running KEY=some task, the output would be other and some.

Like other variables/envs, you can also fall back to a given value using the default template function:

MY_ENV: '{{.MY_ENV | default "fallback"}}'