main: HOTFIX - Add wheel dependency for release

requirements_test.txt

@@ -11,3 +11,6 @@ grpcio==1.*
 grpcio_tools==1.*
 cryptography==38.*
 requests==2.*
+
+# Needed to build the wheel
+wheel

scripts/release.sh

@@ -7,8 +7,21 @@ cd $(dirname ${BASH_SOURCE[0]})/..
 tag=$(echo $REF | cut -d'/' -f3-)
 
 # Build the docker phase that will release and then test it
-docker build . \
-    --target=release_test \
+if docker buildx --help &>/dev/null
+then
+    build_command="docker buildx build --platform=linux/amd64"
+else
+    build_command="docker build"
+fi
+
+# First build the release phase, then build the release_test. These two phases
+# don't depend on each other in docker, so buildx is "smart" and doesn't build
+# release before release_test. They do depend on each other logically, though,
+# so we need to build them explicitly in sequence.
+build_args="
     --build-arg RELEASE_VERSION=$tag \
     --build-arg PYPI_TOKEN=${PYPI_TOKEN:-""} \
-    --build-arg RELEASE_DRY_RUN=${RELEASE_DRY_RUN:-"false"} \
+    --build-arg RELEASE_DRY_RUN=${RELEASE_DRY_RUN:-"false"}
+"
+$build_command . --target=release $build_args
+$build_command . --target=release_test $build_args