add kubectl plugin syntax (#399)

Co-authored-by: mvallillo <mvallillo@microsoft.com>

.gitignore

@@ -21,4 +21,7 @@
 installfilesdev
 
 
-.uptodate
+.uptodate
+
+# allocator compiled plugin
+kubectl-gameserver-allocate

Makefile

@@ -114,3 +114,6 @@ clean:
 	docker rmi $(IMAGE_NAMES) >/dev/null 2>&1 || true
 	rm -rf -- $(UPTODATE_FILES) $(EXES) .cache dist
 	go clean ./...
+
+kubectl-allocator-plugin:
+	./cmd/allocator/build-plugin.sh

cmd/allocator/build-plugin.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+CURR_PATH="$(dirname "$BASH_SOURCE")"
+go build -o $CURR_PATH $CURR_PATH/main.go
+mv $CURR_PATH/command-line-arguments $CURR_PATH/kubectl-gameserver-allocate
+export PATH=$PATH:"$(cd $CURR_PATH; pwd)"
+kubectl plugin list