fix(bindings): pin jobserver in more places and run cargo publish --dry-run in generate.sh

bindings/rust/generate.sh

@@ -48,6 +48,19 @@ cargo publish --dry-run --allow-dirty
 cargo publish --dry-run --allow-dirty --all-features
 popd
 
+# if this version has already been published we can run
+# additional validation to ensure there won't be build
+# problems when a new version is published
+if ! ./scripts/detect-new-release; then
+  pushd s2n-tls
+  cargo publish --dry-run --allow-dirty
+  popd
+
+  pushd s2n-tls-tokio
+  cargo publish --dry-run --allow-dirty
+  popd
+fi
+
 pushd integration
 cargo run
 popd

bindings/rust/s2n-tls-tokio/Cargo.toml

@@ -22,3 +22,8 @@ tokio = { version = "1", features = ["net", "time"] }
 clap = { version = "3", features = ["derive"] }
 rand = { version = "0.8" }
 tokio = { version = "1", features = [ "io-std", "io-util", "macros", "net", "rt-multi-thread", "test-util", "time"] }
+# newer versions require rust 1.66, see https://github.com/aws/s2n-tls/issues/4241
+# this version pin is only needed to prevent verification failures when using
+# cargo package / cargo publish, as those commands do not respect the version pin
+# in downstream dev-dependencies (in s2n-tls-sys, in this case)
+jobserver = "=0.1.26" 

bindings/rust/s2n-tls/Cargo.toml

@@ -29,3 +29,8 @@ futures-test = "0.3"
 openssl = "0.10"
 temp-env = "0.3"
 checkers = "0.6"
+# newer versions require rust 1.66, see https://github.com/aws/s2n-tls/issues/4241
+# this version pin is only needed to prevent verification failures when using
+# cargo package / cargo publish, as those commands do not respect the version pin
+# in downstream dev-dependencies (in s2n-tls-sys, in this case)
+jobserver = "=0.1.26" 

bindings/rust/scripts/detect-new-release

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+#
+# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+# SPDX-License-Identifier: Apache-2.0
+#
+
+set -e
+
+# cd into the script directory so it can be executed from anywhere
+pushd "$(dirname "${BASH_SOURCE[0]}")"
+
+LOCAL_VERSION=$(cargo metadata --manifest-path ../Cargo.toml --no-deps --format-version 1 | jq --raw-output -c '.packages[] | select(.name == "s2n-tls").version')
+CRATES_IO_VERSION=$(cargo search "s2n-tls" --limit 1 | head -n 1 | cut -d'"' -f2)
+
+# Exits with 0 if the local version has not been published to crates.io yet, otherwise exits with 1
+[[ "$LOCAL_VERSION" != "$CRATES_IO_VERSION" ]]