RUST-2217 Optionally support bson crate 3.0 (#1380)

Author: abr-egn

.evergreen/aws-lambda-test/README.md

@@ -33,7 +33,7 @@ To deploy the application, you need the folllowing tools:
 
 * SAM CLI - [Install the SAM CLI](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-sam-cli-install.html)
 * Docker - [Install Docker community edition](https://hub.docker.com/search/?type=edition&offering=community)
-* [Rust](https://www.rust-lang.org/) version 1.74.0 or newer
+* [Rust](https://www.rust-lang.org/) version 1.81.0 or newer
 * [cargo-lambda](https://github.com/cargo-lambda/cargo-lambda) for cross-compilation
 
 To build and deploy your application for the first time, run the following in your shell:

.evergreen/compile-only.sh

@@ -9,9 +9,6 @@ source ./.evergreen/env.sh
 if [ "$RUST_VERSION" != "" ]; then
   rustup toolchain install $RUST_VERSION
   TOOLCHAIN="+${RUST_VERSION}"
-  # Remove the local git dependencies for bson and mongocrypt, which don't work properly with the MSRV resolver.
-  sed -i "s/bson =.*/bson = \"2\"/" Cargo.toml
-  sed -i "s/mongocrypt =.*/mongocrypt = { version = \"0.2\", optional = true }/" Cargo.toml
   CARGO_RESOLVER_INCOMPATIBLE_RUST_VERSIONS=fallback cargo +nightly -Zmsrv-policy generate-lockfile
 fi
 
@@ -22,4 +19,4 @@ cargo $TOOLCHAIN build
 cargo $TOOLCHAIN build --all-features
 
 # Test with no default features.
-cargo $TOOLCHAIN build --no-default-features --features compat-3-0-0,rustls-tls
+cargo $TOOLCHAIN build --no-default-features --features compat-3-3-0,bson-3,rustls-tls

.evergreen/config.yml

@@ -795,7 +795,7 @@ tasks:
       - func: "compile only"
         vars:
           # Our minimum supported Rust version. This should be updated whenever the MSRV is bumped.
-          RUST_VERSION: 1.74.0
+          RUST_VERSION: 1.81.0
 
   - name: check-cargo-deny
     commands:

Cargo.lock

@@ -17,7 +17,7 @@ license = "Apache-2.0"
 readme = "README.md"
 name = "mongodb"
 version = "3.2.3"
-rust-version = "1.74"
+rust-version = "1.81"
 
 exclude = [
     "etc/**",
@@ -30,7 +30,10 @@ exclude = [
 
 [features]
 default = ["compat-3-0-0", "rustls-tls", "dns-resolver"]
-compat-3-0-0 = []
+compat-3-0-0 = ["compat-3-3-0", "bson-2"]
+compat-3-3-0 = []
+bson-2 = ["dep:bson2", "mongocrypt/bson-2"]
+bson-3 = ["dep:bson3", "mongocrypt/bson-3"]
 sync = []
 rustls-tls = ["dep:rustls", "dep:tokio-rustls"]
 openssl-tls = ["dep:openssl", "dep:openssl-probe", "dep:tokio-openssl"]
@@ -73,7 +76,6 @@ tracing-unstable = ["dep:tracing", "dep:log"]
 async-trait = "0.1.42"
 base64 = "0.13.0"
 bitflags = "1.1.0"
-bson = { git = "https://github.com/mongodb/bson-rust", branch = "main", version = "2.14.0" }
 chrono = { version = "0.4.7", default-features = false, features = [
     "clock",
     "std",
@@ -92,7 +94,6 @@ hmac = "0.12.1"
 once_cell = "1.19.0"
 log = { version = "0.4.17", optional = true }
 md-5 = "0.10.1"
-mongocrypt = { git = "https://github.com/mongodb/libmongocrypt-rust.git", branch = "main", optional = true, version = "0.2.1" }
 mongodb-internal-macros = { path = "macros", version = "3.2.3" }
 num_cpus = { version = "1.13.1", optional = true }
 openssl = { version = "0.10.38", optional = true }
@@ -120,6 +121,27 @@ zstd = { version = "0.11.2", optional = true }
 macro_magic = "0.5.1"
 rustversion = "1.0.20"
 
+[dependencies.bson2]
+git = "https://github.com/mongodb/bson-rust"
+branch = "2.15.x"
+package = "bson"
+version = "2.15.0"
+optional = true
+
+[dependencies.bson3]
+git = "https://github.com/mongodb/bson-rust"
+branch = "main"
+package = "bson"
+version = "3.0.0"
+optional = true
+
+[dependencies.mongocrypt]
+git = "https://github.com/mongodb/libmongocrypt-rust.git"
+branch = "main"
+version = "0.3.0"
+default-features = false
+optional = true
+
 [dependencies.pbkdf2]
 version = "0.11.0"
 default-features = false

Cargo.toml

@@ -7,7 +7,7 @@ For more details, including features, runnable examples, troubleshooting resourc
 
 ## Installation
 ### Requirements
-- Rust 1.74.0+ (See the [MSRV policy](#minimum-supported-rust-version-msrv-policy) for more information)
+- Rust 1.81.0+ (See the [MSRV policy](#minimum-supported-rust-version-msrv-policy) for more information)
 - MongoDB 4.0+
 
 #### Supported Platforms
@@ -149,7 +149,7 @@ Commits to main are run automatically on [evergreen](https://evergreen.mongodb.c
 
 ## Minimum supported Rust version (MSRV) policy
 
-The MSRV for this crate is currently 1.74.0. Increases to the MSRV will only happen in a minor or major version release, and will be to a Rust version at least six months old.
+The MSRV for this crate is currently 1.81.0. Increases to the MSRV will only happen in a minor or major version release, and will be to a Rust version at least six months old.
 
 ## License
 

README.md

@@ -1 +1 @@
-msrv = "1.74.0"
+msrv = "1.81.0"

clippy.toml

@@ -88,8 +88,7 @@ pub trait Action: private::Sealed + IntoFuture {
     /// If the value is `Some`, call the provided function on `self`.  Convenient for chained
     /// updates with values that need to be set conditionally.  For example:
     /// ```rust
-    /// # use mongodb::{Client, error::Result};
-    /// # use bson::Document;
+    /// # use mongodb::{Client, error::Result, bson::Document};
     /// use mongodb::action::Action;
     /// async fn list_my_collections(client: &Client, filter: Option<Document>) -> Result<Vec<String>> {
     ///     client.database("my_db")

src/action.rs

@@ -1,6 +1,6 @@
 use std::{marker::PhantomData, time::Duration};
 
-use bson::{Bson, Document};
+use crate::bson::{Bson, Document};
 
 use crate::{
     coll::options::{AggregateOptions, Hint},

src/action/aggregate.rs

@@ -1,4 +1,4 @@
-use bson::{Bson, Document};
+use crate::bson::{Bson, Document};
 use std::time::Duration;
 
 use crate::{