chore: Update interop go binaries (#440)

interop/update_binaries.sh

@@ -0,0 +1,33 @@
+set -e
+
+# This script updates server and client go binaries for interop tests.
+# It clones grpc-go, compiles interop clients and servers for linux, windows
+# and macos and finally deletes the cloned repo.
+#
+# It is not meant to be executed on every test run or CI and should run from
+# inside tonic/interop.
+
+command -v go >/dev/null 2>&1 || {
+  echo >&2 "go executable is not available"
+  exit 1
+}
+
+if [ ! -d "./grpc-go" ]; then
+  git clone https://github.com/grpc/grpc-go.git
+fi
+
+cd grpc-go
+
+PLATFORMS="darwin linux windows"
+ROLES="client server"
+ARCH=amd64
+
+for ROLE in $ROLES; do
+  for OS in $PLATFORMS; do
+    FILENAME="${ROLE}_${OS}_${ARCH}"
+    if [[ "${OS}" == "windows" ]]; then FILENAME="${FILENAME}.exe"; fi
+    GOOS=$OS GOARCH=$ARCH go build -o "../bin/$FILENAME" "./interop/$ROLE"
+  done
+done
+
+rm -rf ../grpc-go