Question 1

How do I use options-gen with Go modules?

Accepted Answer

Install it via go install, add //go:generate directives to your struct files, and run go generate in your module directory—it respects Go module paths and dependencies seamlessly.

Question 2

What's the difference between option:"mandatory" and validate:"required" in options-gen?

Accepted Answer

option:"mandatory" makes the field a required constructor parameter enforced at compile-time, while validate:"required" adds a runtime check using go-playground/validator, as explained in the README's 'Understanding Tags' section.

Question 3

Can options-gen handle embedded structs or nested configurations?

Accepted Answer

The README doesn't explicitly support embedded structs; you'd need to generate options for each struct separately or use type aliasing, which may require extra manual work for nested setups.

Question 4

Options-gen vs writing functional options manually: which should I choose?

Accepted Answer

Use options-gen for larger projects to reduce boilerplate and ensure type safety, but manual writing is better if you need full control, have simple structs, or want to avoid code generation overhead.

Question 5

How to add custom validation rules with options-gen?

Accepted Answer

Implement a Validator() method in your options struct or override the global validator, as described in the 'Custom validator' section, allowing integration with custom or complex validation logic.

Question 6

What happens if I forget to run go generate after changing my struct?

Accepted Answer

The generated code becomes outdated, potentially causing compilation errors or validation mismatches; integrate go generate into your CI/CD or pre-commit hooks to prevent this.

options-gen

What is options-gen?

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