RUST-481 Add Windows to CI (#209)

Author: saghm

.evergreen/config.yml

@@ -200,6 +200,9 @@ functions:
             mv $i.new $i
           done
 
+          # Copy client certificate because symlinks do not work on Windows.
+          cp ${DRIVERS_TOOLS}/.evergreen/x509gen/client.pem ${MONGO_ORCHESTRATION_HOME}/lib/client.pem
+
   "make files executable":
     - command: shell.exec
       params:
@@ -430,6 +433,9 @@ axes:
         run_on: macos-1014
         variables:
           SINGLE_THREAD: true
+      - id: windows-64-vs2017-small
+        display_name: "Windows (VS 2017)"
+        run_on: windows-64-vs2017-small
 
 buildvariants:
 -
@@ -446,7 +452,9 @@ buildvariants:
      - ".3.6"
 - matrix_name: "atlas-connect"
   matrix_spec:
-    os: "*"
+    os:
+      - ubuntu-16.04
+      - macos-10.14
     async-runtime: "*"
   display_name: "Atlas Connectivity ${os} with ${async-runtime}"
   tasks:

.evergreen/install-dependencies.sh

@@ -1,7 +1,21 @@
 #!/bin/sh
 
+# Make sure to use msvc toolchain rather than gnu, which is the default for cygwin
+if [ "Windows_NT" == "$OS" ]; then
+    export DEFAULT_HOST_OPTIONS='--default-host x86_64-pc-windows-msvc'
+fi
+
 rm -rf ~/.rustup
-curl https://sh.rustup.rs -sSf | sh -s -- -y --no-modify-path
+curl https://sh.rustup.rs -sSf | sh -s -- -y --no-modify-path $DEFAULT_HOST_OPTIONS
+
+# rustup installs into C:\Users\$USER instead of C:\home\$USER, so we symlink both .rustup and .cargo
+if [ "Windows_NT" == "$OS" ]; then
+    ln -s /cygdrive/c/Users/$USER/.rustup/ ~/.rustup
+    ln -s /cygdrive/c/Users/$USER/.cargo/ ~/.cargo
+fi
+
+# This file is not created by default on Windows
+echo 'export PATH=$PATH:~/.cargo/bin' >> ~/.cargo/env
 
 echo "export CARGO_NET_GIT_FETCH_WITH_CLI=true" >> ~/.cargo/env
 . ~/.cargo/env

README.md

@@ -15,6 +15,7 @@ This repository contains the officially supported MongoDB Rust driver, a client
         - [Inserting documents into a collection](#inserting-documents-into-a-collection)
         - [Finding documents in a collection](#finding-documents-in-a-collection)
     - [Using the sync API](#using-the-sync-api)
+- [Platforms](#platforms)
 - [Atlas note](#atlas-note)
 - [Windows DNS note](#windows-dns-note)
 - [Bug Reporting / Feature Requests](#bug-reporting--feature-requests)
@@ -180,6 +181,10 @@ for result in cursor {
 }
 ```
 
+## Platforms
+
+The driver tests against Linux, MacOS, and Windows in CI.
+
 ## Atlas note
 
 Currently, the driver has issues connecting to Atlas tiers above M2 unless the server version is at least 4.2. We're working on fixing this, but in the meantime, a workaround is to upgrade your cluster to 4.2. The driver has no known issues with either M0 or M2 instances.

src/client/options/mod.rs

@@ -24,7 +24,7 @@ use rustls::{
 };
 use serde::Deserialize;
 use strsim::jaro_winkler;
-use trust_dns_resolver::config::ResolverConfig;
+pub use trust_dns_resolver::config::ResolverConfig;
 use typed_builder::TypedBuilder;
 use webpki_roots::TLS_SERVER_ROOTS;
 

src/test/spec/initial_dns_seedlist_discovery.rs

@@ -1,6 +1,9 @@
 use serde::Deserialize;
 
-use crate::{options::ClientOptions, test::run_spec_test};
+use crate::{
+    options::{ClientOptions, ResolverConfig},
+    test::run_spec_test,
+};
 
 #[derive(Debug, Deserialize)]
 struct TestFile {
@@ -37,7 +40,12 @@ async fn run() {
             return;
         }
 
-        let result = ClientOptions::parse(&test_file.uri).await;
+        let result = if cfg!(target_os = "windows") {
+            ClientOptions::parse_with_resolver_config(&test_file.uri, ResolverConfig::cloudflare())
+                .await
+        } else {
+            ClientOptions::parse(&test_file.uri).await
+        };
 
         if let Some(true) = test_file.error {
             assert!(matches!(result, Err(_)), test_file.comment.unwrap());