starlark-hooks
Check component ownership before Terraform plans a module using Atmos Automation Language, a Python-like language built on Starlark and embedded in Atmos. The hook reads resolved stack variables…
Try it out
- Install Atmos
- Try the example
Copy the example into a new directory and make it your own:
atmos init examples/starlark-hooks
cd starlark-hooks
Follow the README for prerequisites and next steps.
See it in action
RECORDED DEMO A lifecycle hook with Atmos Automation
Check component ownership before Terraform plans a module using Atmos Automation
Language, a Python-like language built on Starlark and embedded in Atmos. The hook reads
resolved stack variables directly through ctx.component; it needs no shell
parsing or extra atmos describe call.
Install Terraform and run from this directory:
Atmos prints Owner check passed: api belongs to platform (dev)., then Terraform
reports no changes. The module has no providers or resources, so the command
requires no credentials, network access, or provider installation.
The unowned stack inherits the same component but clears its owner. To see the
guard stop the plan before Terraform runs:
The hook fails with Set an owner before planning api.
The stack names the component api while its implementation directory is service.
The hook receives the component's stack identity automatically.
See hooks and Starlark lifecycle context.
