Question 1

How do I use tfmv with regular expressions to rename Terraform resources?

Accepted Answer

Use the --regexp flag with a regex pattern, like `tfmv --regexp '-prod$/'` to remove suffixes. It matches resource names and updates references, but ensure you understand Go's regex syntax as documented in the README.

Question 2

tfmv vs manually writing moved blocks: which is safer for large projects?

Accepted Answer

tfmv automates the process, reducing human error by updating all references and generating moved blocks consistently. Manual writing is prone to missed updates, especially in complex configurations, making tfmv safer for scalability.

Question 3

Can tfmv rename resources across multiple Terraform workspaces?

Accepted Answer

The README doesn't mention workspace support; tfmv focuses on file-based processing. For multi-workspace setups, you might need to run it separately per workspace, which can be cumbersome.

Question 4

What happens if tfmv makes a mistake during renaming?

Accepted Answer

Always use --dry-run to preview changes first. If a mistake occurs, you must revert using git or backups, as tfmv lacks an undo feature. This reliance on external tools adds risk in production environments.

Question 5

How to integrate tfmv into a CI/CD pipeline for Terraform?

Accepted Answer

Since tfmv is a CLI tool, you can add it as a step in your pipeline scripts, using --dry-run for validation and then applying changes. Ensure your pipeline handles state consistency and version control for rollbacks.

Question 6

Does tfmv support renaming in Terraform variables and outputs?

Accepted Answer

The examples show it updates references in data sources and outputs, but the README doesn't explicitly cover variables. Test with your configuration, as it might not handle all HCL constructs like variable references.

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