Enhance Attribute Name Validation to Handle Leading Numerics

[bflad]

Module version

v1.2.0

Use-cases

The framework's attribute name validation is currently the regular expression ^[a-z0-9_]+$. The Terraform configuration language forbids identifiers (how attribute names are handled) from beginning with numeric characters.

Proposal

Adjust the attribute name validation regular expression to ^[a-z_][a-z0-9_]*$. Technically the validation should also permit hyphens (-), however the provider ecosystem has conventionally never used hyphens in attribute names, so the framework should remain opinionated here to prevent introducing practitioner confusion.

References

• https://developer.hashicorp.com/terraform/language/syntax/configuration#identifiers

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