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I would like to create a gitlab variable using the variables: keyword that contains an array of dependencies to pass to the GitLab dependencies: keyword. The structure would look something like:

variables:
    DEPENDENCY_LIST: ["dependency1", "dependency2", "dependency3"]

dependencies: "$DEPENDENCY_LIST"

But the above code gives a YAML error saying that "jobs:source code dependencies should be an array of strings"

How can I set the value of a GitLab CI variable to an array in a .gitlab-ci.yml job?

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How do you set a GitLab CI variable to an array in gitlab-ci?

You can't - environment variables are in the form name=value. There are no arrays.

Use yaml anchors.

.dependency_list: &dependency_list
   - dependency1
   - dependency2
   - dependency3

dependencies: *dependency_list

However gitlab-ci does not flatten nested arrays in dependencies, so there is no way to merge two arrays.

See gitlab ci documentation.

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