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+# Rust Thrift library
+
+## Overview
+
+This crate implements the components required to build a working Thrift server
+and client. It is divided into the following modules:
+
+ 1. errors
+ 2. protocol
+ 3. transport
+ 4. server
+ 5. autogen
+
+The modules are layered as shown. The `generated` layer is code generated by the
+Thrift compiler's Rust plugin. It uses the components defined in this crate to
+serialize and deserialize types and implement RPC. Users interact with these
+types and services by writing their own code on top.
+
+ ```text
+ +-----------+
+ |  app dev  |
+ +-----------+
+ | generated | <-> errors/results
+ +-----------+
+ |  protocol |
+ +-----------+
+ | transport |
+ +-----------+
+ ```
+
+## Using this crate
+
+Add `thrift = "x.y.z"` to your `Cargo.toml`, where `x.y.z` is the version of the
+Thrift compiler you're using.
+
+## API Documentation
+
+Full [Rustdoc](https://docs.rs/thrift/)
+
+## Compatibility
+
+The Rust library and auto-generated code targets Rust versions 1.28+.
+It does not currently use any Rust 2018 features.
+
+### Breaking Changes
+
+Breaking changes are minimized. When they are made they will be outlined below with transition guidelines.
+
+##### Thrift 0.13.0
+
+* **[THRIFT-4536]** - Use TryFrom from std, required rust 1.34.0 or higher
+
+    Previously TryFrom was from try_from crate, it is now from the std library,
+    but this functionality is only available in rust 1.34.0. Additionally, 
+    ordered-float is now re-exported under the thrift module to reduce 
+    possible dependency mismatches.
+
+##### Thrift 0.12.0
+
+* **[THRIFT-4529]** - Rust enum variants are now camel-cased instead of uppercased to conform to Rust naming conventions
+
+    Previously, enum variants were uppercased in the auto-generated code.
+    For example, the following thrift enum:
+
+    ```thrift
+    // THRIFT
+    enum Operation {
+      ADD,
+      SUBTRACT,
+      MULTIPLY,
+      DIVIDE,
+    }
+    ```
+    
+    used to generate:
+    
+    ```rust
+    // OLD AUTO-GENERATED RUST
+    pub enum Operation {
+       ADD,
+       SUBTRACT,
+       MULTIPLY,
+       DIVIDE,
+     }
+    ```
+    It *now* generates:
+    ```rust
+    // NEW AUTO-GENERATED RUST
+    pub enum Operation {
+       Add,
+       Subtract,
+       Multiply,
+       Divide,
+     }
+    ```
+    
+    You will have to change all enum variants in your code to use camel-cased names.
+    This should be a search and replace.
+
+## Contributing
+
+Bug reports and PRs are always welcome! Please see the
+[Thrift website](https://thrift.apache.org/) for more details.
+
+Thrift Rust support requires code in several directories:
+
+* `compiler/cpp/src/thrift/generate/t_rs_generator.cc`: binding code generator
+* `lib/rs`: runtime library
+* `lib/rs/test`: supplemental tests
+* `tutorial/rs`: tutorial client and server
+* `test/rs`: cross-language test client and server
+
+All library code, test code and auto-generated code compiles and passes clippy
+without warnings. All new code must do the same! When making changes ensure that:
+
+* `rustc` does does output any warnings
+* `clippy` with default settings does not output any warnings (includes auto-generated code)
+* `cargo test` is successful
+* `make precross` and `make check` are successful
+* `tutorial/bin/tutorial_client` and `tutorial/bin/tutorial_server` communicate