My environment requires the use of the predefined variable CI_PROJECT_NAMESPACE in .gitlab-ci.yml; however, this variable is in all caps, which makes my build job fail. I've tried several ways to convert the value of this variable to all lowercase with no success:

  CI_PROJECT_NAMESPACE: $CI_PROJECT_NAMESPACE | tr '[:upper:]' '[:lower:]' # doesn't work

  stage: build
    name: #...
    entrypoint: #...
    - export CI_PROJECT_NAMESPACE=$CI_PROJECT_NAMESPACE | tr '[:upper:]' '[:lower:]' # also doesn't work

I have successfully hard-coded this variable for my own use, but I need the script to work for other users as well without requiring them to hard-code it themselves. Thanks in advance for your thoughts!

  • You're on the right track with your before_script, but there are some quoting issues. It helps to test out these commands in a local shell first.
    – LLlAMnYP
    Commented Feb 16, 2023 at 2:48

1 Answer 1


You had it almost right. You just can't pipe variable itself to tr. You have to use echo in command substitution, which you can pipe to tr.

- export CI_PROJECT_NAMESPACE=$(echo "$CI_PROJECT_NAMESPACE" | tr '[:upper:]' '[:lower:]')

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