It's basically the 0.5.0 version. The only noticeable change is that the Wasmer runtime has been updated to version 2.0.

Added

• All examples are now tested as part of the test suite (#53 by @Hywan)

Changed

• The Ruby embedding has been updated to Wasmer 2.0, which is faster in many regards (#57 by @Hywan)

This is a full rewrite of the entire project. This version is a candidate to become the 1.0 version.

We advise to take a look at:

• the new documentation online,
• the collection of examples.

Shortly, here are the new types the extension provides:

• Store, which holds the engine, the compiler etc.
• Module, which represents a Wasm module, with validate, new, name=, name, exports, imports, custom_sections, serialize and deserialize,
• Instance, which represents a Wasm instance, with new and exports,
• Exports, which represents a collection of exported entities, with respond_to_missing?, method_missing, and length,
• ImportObject, which represents a collection of imports that will be passed to Instance, with new, contains_namespace, and register,
• Function, which represents an imported or exported function, with new, call and type,
• Memory, which represents an imported or exported memory, with new, type, size, data_size, grow, + memory views that extends Enumerable,
• Global, which represents an imported or exported global, with new, mutable?, value, value=, and type,
• Table, which represents an imported or exported table, with new (small API for the moment),
• Type, FunctionType, MemoryType, GlobalType and TableType,
• ExportType and ImportType,
• Value which represents a Wasm value,
• Wasi module, which provides the Version, StateBuilder and Environment classes.

Added

• Online documentation, with tested examples (#51 by [@Hywan])
• Tests run against Ruby 2.7 + 3.0, and against Linux + macOS (#49 by [@Hywan])

Changed

As we said, the extension has been fully rewritten, and the code is likely to not be compatible anymore. Here are the most notable patches:

• The big rewrite (#48 by @Hywan)
• Remove Ruby dependency to rutie (#52 by @Hywan)

Added

• Support exported global variables (#32 by @Hywan)

  instance = Wasmer::Instance.new bytes
  x = instance.globals.x
  
  assert x.mutable
  assert_equal x.value, 7
  
  x.value = 42
  
  assert_equal x.value, 42
  

• Support memory without an exported memory (#31 by @Hywan)

Changed

• Set @memory to nil if none is exported (#33 by @Hywan)
• Migrate CI from CircleCI to Github Actions (#28 by @Hywan)
• Format code (#26 by @Atul9)
• Update Rutie to 0.7.0 (Rust) and 0.0.4 (Ruby) (#23 by @Hywan)
• Update Wasmer from 0.6.0 to 0.14.0 (#23, #24, #25, #35, by @Hywan)

Security

• Update rake and other dependencies (#36 by @Hywan)

Features

Extension

• #19 Add the Memory.grow method (@Hywan)

• #15 Typed arrays implement the Enumerable mixin (@irxground)

  memory = instance.memory.uint8_view pointer
  string = ""
  
  # Now we can write this more Ruby idiomatic loop:
  memory.each do |char|
    break if char == 0
    string += char.chr
  end
  

• #9 Implement instance.exports.respond_to? to test whether an exported function exists (@irxground)

  instance = Wasmer::Instance.new(self.bytes)
  
  assert instance.exports.respond_to?(:foo)
  

• #5 Improve Ruby exception raising (@irxground)

Runtime

• #20 Update Wasmer to 0.5.5 (@Hywan)
• #11 Update Wasmer to 0.4.2 (@Hywan)
• #7 Update Wasmer to 0.4.1 (@Hywan)

Bug/security fixes

• #16 Update Rutie (@edvakf)

• #8 Handle exported functions that return nothing, aka void functions (@Hywan)

• #4 Move all symbols inside the Wasmer module (@irxground)

  # Read from the `Wasmer` module.
  instance = Wasmer::Instance.new()
  

Documentation

• #14 Improve documentation (@denniscollective)
• #12 Add the greet eaxmple (@Hywan)

Chore

• #13 Use assert_nil instead of assert_equal_nil in tests (@Hywan)
• #10 Set up Bors (@Hywan)