[Bug]: Namespace name not updated when passing variables via CLI in Garden environment configuration

[Daphaz]

Bug

Current behavior

When dynamically defining a namespace name in the project.garden.yml using a variable passed through the CLI, the namespace name reverts to the default value instead of the one passed via the command line. For example, in the following configuration:

variables:
  my-variable: ${git.branch}
environments:
  - name: preview
    defaultNamespace: ns-${var.my-variable}

When running the command garden deploy --env preview --var my-variable=test,
the expected namespace should be ns-test, but it instead uses the default value based on the git branch.

Expected behavior

The namespace name should be dynamically assigned based on the variable passed via the CLI (--var my-variable=test), not reverting to the default.

Reproducible example

1. Define the following configuration in your project.garden.yml:

variables:
  my-variable: ${git.branch}
environments:
  - name: preview
    defaultNamespace: ns-${var.my-variable}

2. Run the command:

garden deploy --env preview --var my-variable=test

3. Observe the namespace generated is not ns-test, but based on the default git branch instead.

Workaround

As a workaround, use environment variables to override the value:

variables:
  source-branch: ${local.env.SOURCE_BRANCH_OVERRIDE || git.branch}
environments:
  - name: preview
    defaultNamespace: ns-${var.source-branch}

And run the command with the following:

SOURCE_BRANCH_OVERRIDE=test garden deploy --env preview

Suggested solution(s)

N/A

Additional context

N/A

Your environment

• OS: macOS 14.5 (M1)
• How I'm running Kubernetes: EKS

garden version: 0.13.41

[eysi09]

This looks like a legit bug but just FYI and to add to the list of workarounds, you can also set the namespace via the --env flag with the format <namespace>.<environment>.

For example:

garden deploy --env my-namespace.my-env

(From this guide: https://docs.garden.io/guides/namespaces)