API Report

This is a tool used to generate a progress report from two given API states, a 'specification' and an 'implementation'.

Ruffle uses this to create their automatic Flash AVM2 progress report, as seen on their website.

Building from source

Follow the official guide to install Rust for your platform.

Then simply cargo build --release to build the binary, or in the instructions below replace avm_report with cargo run -- to run the tool directly.

Usage

To see the full help info, run avm_report --help.

You'll need two files, a specification that describes the API and an implementation that describes the current state of the API implemented. We provide an AVM2 specification in the repo for Ruffle's own use.

Run avm_report -s specification.json -i implementation.json -o report.json.

Specification / Implementation format

If you read Rust, there's a general view of the structure over at src/specification.rs.

Report format

This tool quanitifies progress with a points system:

• Any "item" in specification is worth 1 point. If it's a function or a class or a field, doesn't matter. This is totalled in max_points.
• If an item from specification exists in implementation, you gain a point in impl_points.
• If that same item is marked as a "stub" in implementation, you gain a point in stub_penalty.

To calculate a percentage, it's impl_points / max_points to see what exists, or (impl_points - stub_penalty) / max_points to see what's actually done.

This allows you to show the stubs differently on a progress bar, for example.