August 31st, 2022

Breaking Changes:

• ⚠🎉 (client, smithy-rs#1598) Previously, the config customizations that added functionality related to retry configs, timeout configs, and the
  async sleep impl were defined in the smithy codegen module but were being loaded in the AWS codegen module. They
  have now been updated to be loaded during smithy codegen. The affected classes are all defined in the
  software.amazon.smithy.rust.codegen.smithy.customizations module of smithy codegen.` This change does not affect
  the generated code.

  These classes have been removed:

  • RetryConfigDecorator
  • SleepImplDecorator
  • TimeoutConfigDecorator

  These classes have been renamed:

  • RetryConfigProviderConfig is now RetryConfigProviderCustomization
  • PubUseRetryConfig is now PubUseRetryConfigGenerator
  • SleepImplProviderConfig is now SleepImplProviderCustomization
  • TimeoutConfigProviderConfig is now TimeoutConfigProviderCustomization

• ⚠🎉 (all, smithy-rs#1635, smithy-rs#1416, @weihanglo) Support granular control of specifying runtime crate versions.

  For code generation, the field runtimeConfig.version in smithy-build.json has been removed.
  The new field runtimeConfig.versions is an object whose keys are runtime crate names (e.g. aws-smithy-http),
  and values are user-specified versions.

  If you previously set version = "DEFAULT", the migration path is simple.
  By setting versions with an empty object or just not setting it at all,
  the version number of the code generator will be used as the version for all runtime crates.

  If you specified a certain version such as version = "0.47.0", you can migrate to a special reserved key DEFAULT`.
  The equivalent JSON config would look like:

  {
    "runtimeConfig": {
        "versions": {
            "DEFAULT": "0.47.0"
        }
    }
  }

  Then all runtime crates are set with version 0.47.0 by default unless overridden by specific crates. For example,

  {
    "runtimeConfig": {
        "versions": {
            "DEFAULT": "0.47.0",
            "aws-smithy-http": "0.47.1"
        }
    }
  }

  implies that we're using aws-smithy-http 0.47.1 specifically. For the rest of the crates, it will default to 0.47.0.

• ⚠ (all, smithy-rs#1623, @ogudavid) Remove @sensitive trait tests which applied trait to member. The ability to mark members with @sensitive was removed in Smithy 1.22.

• ⚠ (server, smithy-rs#1544) Servers now allow requests' ACCEPT header values to be:

  • */*
  • type/*
  • type/subtype

• 🐛⚠ (all, smithy-rs#1274) Lossy converters into integer types for aws_smithy_types::Number have been
  removed. Lossy converters into floating point types for
  aws_smithy_types::Number have been suffixed with _lossy. If you were
  directly using the integer lossy converters, we recommend you use the safe
  converters.
  Before:

  fn f1(n: aws_smithy_types::Number) {
      let foo: f32 = n.to_f32(); // Lossy conversion!
      let bar: u32 = n.to_u32(); // Lossy conversion!
  }

  After:

  fn f1(n: aws_smithy_types::Number) {
      use std::convert::TryInto; // Unnecessary import if you're using Rust 2021 edition.
      let foo: f32 = n.try_into().expect("lossy conversion detected"); // Or handle the error instead of panicking.
      // You can still do lossy conversions, but only into floating point types.
      let foo: f32 = n.to_f32_lossy();
      // To lossily convert into integer types, use an `as` cast directly.
      let bar: u32 = n as u32; // Lossy conversion!
  }

• ⚠ (all, smithy-rs#1699) Bump MSRV from 1.58.1 to 1.61.0 per our policy.

New this release:

• 🎉 (all, smithy-rs#1623, @ogudavid) Update Smithy dependency to 1.23.1. Models using version 2.0 of the IDL are now supported.

• 🎉 (server, smithy-rs#1551, @hugobast) There is a canonical and easier way to run smithy-rs on Lambda see example.

• 🐛 (all, smithy-rs#1623, @ogudavid) Fix detecting sensitive members through their target shape having the @sensitive trait applied.

• (all, smithy-rs#1623, @ogudavid) Fix SetShape matching needing to occur before ListShape since it is now a subclass. Sets were deprecated in Smithy 1.22.

• (all, smithy-rs#1623, @ogudavid) Fix Union shape test data having an invalid empty union. Break fixed from Smithy 1.21 to Smithy 1.22.

• (all, smithy-rs#1612, @unexge) Add codegen version to generated package metadata

• (client, aws-sdk-rust#609) It is now possible to exempt specific operations from XML body root checking. To do this, add the AllowInvalidXmlRoot
  trait to the output struct of the operation you want to exempt.

Contributors
Thank you for your contributions! ❤

• @hugobast (smithy-rs#1551)
• @ogudavid (smithy-rs#1623)
• @unexge (smithy-rs#1612)
• @weihanglo (smithy-rs#1416, smithy-rs#1635)