how-to-use-direnv.md

How to use direnv

As a developer, it can be better not to think too much about setting the right env variables as you enter a project. direnv aims at providing a solution.

As a quick guide as an openfoodfacts developer:

• install direnv on your system using the usual package manager
• in your .bashrc add:

  # direnv
  eval "$(direnv hook bash)"

  You have to adapt the direnv line according to what you use; see direnv doc.
• in your project directory add a file, where you override variables from .env that you want to:

echo "setting up docker compose env"
export DOCKER_BUILDKIT=1
# The next two lines do the same thing in different ways; choose one.
export USER_UID=${UID}
export USER_UID=$(id -g)

• in your project directory, run direnv allow .
• in a new shell:
  • go to the project directory
  • direnv should trigger and load your variables