Introducing Watgo: A WebAssembly Toolkit for Go

I'm thrilled to unveil watgo, a WebAssembly Toolkit crafted entirely in Go, offering a zero-dependency solution akin to wabt and wasm-tools. Watgo provides a command-line interface (CLI) and a Go API to seamlessly parse, validate, and encode WebAssembly Text (WAT) into WASM binaries, as well as decode WASM binaries back into a semantic representation called wasmir. This toolkit is designed to be user-friendly and efficient, making it a valuable asset for developers working with WebAssembly.

## CLI and API Features

The watgo CLI can be easily installed, and it aims for compatibility with wasm-tools. I've already integrated it into my wasm-wat-samples projects, allowing for straightforward parsing, validation, and encoding of WAT files into binary format. The API leverages wasmir to represent WASM modules semantically, providing an intuitive interface for developers to analyze and manipulate WebAssembly code.

## Handling WAT and WASM

Watgo processes WAT by flattening and canonicalizing syntactic elements into wasmir, aligning with WASM's validation and execution semantics. While the textformat package, which parses WAT into an abstract syntax tree (AST), remains internal, there's potential for public exposure if demand arises.

## Robust Testing Strategy

Despite being in its early stages, watgo's reliability is bolstered by rigorous testing. Utilizing the extensive official WebAssembly test suite, watgo ensures comprehensive coverage by converting WAT to binary WASM and executing it with Node.js. This approach, along with leveraging wabt's interp test suite and maintaining realistic WAT program samples, guarantees watgo's robustness and compliance with the WASM specification.

## Future Prospects

While not all functionalities of wasm-tools are yet supported, watgo's development is ongoing, with potential expansions and enhancements on the horizon. The commitment to a pure-Go approach, despite challenges like the lack of support for recent WASM proposals in wazero, underscores the dedication to maintaining watgo's integrity and performance.