Task•4d ago

dotnev variable value calculation

Hello ! I canot find anything in the docs so I decided to ask here: Is there some sort of prioirity in the dotenv declaraion? Like if I declare it to be ['.env', '$HOME/.env'] and have DEPLOY="true" in .env but DEPLOY="false" in $HOME/.env what will be the value of DEPLOY in the end? - true because .env is first so its values take precedence? - false because $HOME/.env is last so its value override the rest?

Solution:

Hello ! It'll be true. Dotenv files are processed in the order they are defined. If an environment variable already exists, it won't be overridden....

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Solution

vmaerten•3d ago

Hello ! It'll be true. Dotenv files are processed in the order they are defined. If an environment variable already exists, it won't be overridden.

grumpper•3d ago

this is kinda weird though because i am seeing the opposite. I am trying to use it in github CI/CD automation (as part of a custom github action). My idea is for the user to provide a .env file with configuration (i.e. DEPLOY=true) but if the user don't do that I still get to set it up from my own .env file. So I tested it and if what you are saying was true it should have been true but was actually still false... This is the specific example: Here is the code:

version: '3'

silent: true

env:
  CLIENT:
    # The path to the client's repo's root
    sh: echo $GITHUB_WORKSPACE
  ACTION:
    # The path to the custom action's repo root
    sh: echo $GITHUB_ACTION_PATH

dotenv: ['{{.CLIENT}}/uci.env', '{{.ACTION}}/uci.env']

includes:
  terraform_tasks:
    taskfile: '{{.ACTION}}/tasks/terraform.yml'

tasks:
  terraform_checks:
    name: Run terraform CI checks
    ignore_error: true
    # Run a task from included task file
    deps:
      - terraform_tasks:default
    preconditions:
      - sh: '[[ "$TERRAFORM_CHECKS" == "true" ]]'

  default:
    deps:
      - terraform_checks

version: '3'

silent: true

env:
  CLIENT:
    # The path to the client's repo's root
    sh: echo $GITHUB_WORKSPACE
  ACTION:
    # The path to the custom action's repo root
    sh: echo $GITHUB_ACTION_PATH

dotenv: ['{{.CLIENT}}/uci.env', '{{.ACTION}}/uci.env']

includes:
  terraform_tasks:
    taskfile: '{{.ACTION}}/tasks/terraform.yml'

tasks:
  terraform_checks:
    name: Run terraform CI checks
    ignore_error: true
    # Run a task from included task file
    deps:
      - terraform_tasks:default
    preconditions:
      - sh: '[[ "$TERRAFORM_CHECKS" == "true" ]]'

  default:
    deps:
      - terraform_checks

In the client's side's uci.env the setting is TERRAFORM_CHECKS=false In the action's side is still TERRAFORM_CHECKS=true The step gets executed... 😦 Hmmm! You are correct that the final value is false. And the precondition should also be false unless I am declaring it wrong. i think I am trying to achieve conditional logic where preconditions is not the proper use case. i will mark the answer above as solved as this is the dotenv question after all.

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dotnev variable value calculation