How to capture errors and set a default value when using output to set a variable?

[jbwfu]

I am using the template {{- $gituser := output "git" "config" "--global" "--get" "user.name" | trim -}} to get the Git username. If the Git configuration file does not exist, the Git command returns 1, which causes chezmoi to report an "exit status 1" error. What can I do to achieve my goal?

I have tried searching for related topics, but I haven't found what I'm looking for (perhaps I missed something).

[jbwfu]

This can be achieved by executing sh -c.

chezmoi execute-template '{{- output "sh" "-c" "git config --global --get user.name || echo test" -}}'