Question 1

How to embed Starlark in a Go application?

Accepted Answer

Use the `starlark.ExecFile` or `starlark.Exec` functions from the `go.starlark.net/starlark` package, as shown in the README example. You can define custom functions and data types via the API to extend functionality for your specific use case.

Question 2

Starlark vs JSON for configuration files

Accepted Answer

Starlark offers programming constructs like functions and loops, making it more expressive for dynamic configurations, while JSON is better for simple, static data. Starlark's Python-like syntax can reduce repetition, but it adds interpreter overhead compared to JSON's lightweight parsing.

Question 3

Can Starlark use Python libraries?

Accepted Answer

No, Starlark is a subset of Python and does not support the full Python standard library or third-party packages. It's designed for embedding in applications, so you must rely on custom functions defined in Go or built-in Starlark features.

Question 4

How does Starlark handle error handling in Go?

Accepted Answer

Errors in Starlark execution are returned as Go error types, allowing you to handle them natively in your Go code. The API provides detailed error messages for debugging, but you need to manage error propagation and recovery within your application logic.

Question 5

Starlark performance benchmarks compared to Lua

Accepted Answer

Starlark's parallel execution can offer better scalability on multi-core systems, but Lua is often faster for single-threaded tasks due to its lightweight design. For Go applications, Starlark integrates more seamlessly, while Lua might require CGO or external bindings.

Question 6

What are the syntax differences between Starlark and Python?

Accepted Answer

Starlark omits some Python features like classes, exceptions with try/except, and dynamic imports, focusing on simplicity for configuration. It maintains core syntax like functions and data structures, but check the spec.md for exact limitations and variations.

starlark-go

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