RUST-870 Support deserializing directly from raw BSON (#276)

This commit also adds support for borrowed deserialization (#231, RUST-688) and fixes RUST-880 and RUST-884.

Author: patrickfreed

.evergreen/config.yml

@@ -102,6 +102,16 @@ functions:
           ${PREPARE_SHELL}
           .evergreen/run-tests-serde.sh
 
+  "run decimal128 tests":
+    - command: shell.exec
+      type: test
+      params:
+        shell: bash
+        working_dir: "src"
+        script: |
+          ${PREPARE_SHELL}
+          .evergreen/run-tests-decimal128.sh
+
   "compile only":
     - command: shell.exec
       type: test
@@ -164,6 +174,10 @@ tasks:
     commands:
       - func: "run serde tests"
 
+  - name: "test-decimal128"
+    commands:
+      - func: "run decimal128 tests"
+
   - name: "compile-only"
     commands:
       - func: "compile only"
@@ -180,9 +194,9 @@ axes:
   - id: "extra-rust-versions"
     values:
       - id: "min"
-        display_name: "1.43 (minimum supported version)"
+        display_name: "1.48 (minimum supported version)"
         variables:
-          RUST_VERSION: "1.43.1"
+          RUST_VERSION: "1.48.0"
       - id: "nightly"
         display_name: "nightly"
         variables:
@@ -198,6 +212,7 @@ buildvariants:
     - name: "test"
     - name: "test-u2i"
     - name: "test-serde"
+    - name: "test-decimal128"
 
 - matrix_name: "compile only"
   matrix_spec:

.evergreen/run-tests-decimal128.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+set -o errexit
+
+. ~/.cargo/env
+RUST_BACKTRACE=1 cargo test --features decimal128

Cargo.toml

@@ -57,6 +57,7 @@ decimal = { version = "2.1.0", default_features = false, optional = true }
 base64 = "0.13.0"
 lazy_static = "1.4.0"
 uuid = "0.8.1"
+serde_bytes = "0.11.5"
 
 [dev-dependencies]
 assert_matches = "1.2"

README.md

@@ -28,6 +28,8 @@ This crate works with Cargo and can be found on
 bson = "2.0.0-beta.2"
 ```
 
+This crate requires Rust 1.48+.
+
 ## Overview of BSON Format
 
 BSON, short for Binary JSON, is a binary-encoded serialization of JSON-like documents.

serde-tests/Cargo.toml

@@ -5,8 +5,9 @@ authors = ["Kevin Yeh <[email protected]>"]
 edition = "2018"
 
 [dependencies]
-bson = { path = ".." }
+bson = { path = "..", features = ["decimal128"] }
 serde = { version = "1.0", features = ["derive"] }
+pretty_assertions = "0.6.1"
 
 [lib]
 name = "serde_tests"