Check KUBE_SERVER_PLATFORMS existence

when compile kubectl on platform other than linux/amd64, we need to check the KUBE_SERVER_PLATFORMS array emptiness before assign it. the example command is: make WHAT=cmd/kubectl KUBE_BUILD_PLATFORMS="darwin/amd64 windows/amd64"

Check KUBE_SERVER_PLATFORMS existence
6c8aabc8 · hui luo · 667c3ed9 · 6c8aabc8
Commit 6c8aabc8 authored May 17, 2019 by hui luo
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golang.sh hack/lib/golang.sh +1 -1

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--- a/hack/lib/golang.sh
+++ b/hack/lib/golang.sh
@@ -302,7 +302,7 @@ kube::golang::server_test_targets() {
 IFS=" " read -ra KUBE_TEST_SERVER_TARGETS <<< "$(kube::golang::server_test_targets)"
 readonly KUBE_TEST_SERVER_TARGETS
 readonly KUBE_TEST_SERVER_BINARIES=("${KUBE_TEST_SERVER_TARGETS[@]##*/}")
-readonly KUBE_TEST_SERVER_PLATFORMS=("${KUBE_SERVER_PLATFORMS[@]}")
+readonly KUBE_TEST_SERVER_PLATFORMS=("${KUBE_SERVER_PLATFORMS[@]:+"${KUBE_SERVER_PLATFORMS[@]}"}")
 # Gigabytes necessary for parallel platform builds.
 # As of January 2018, RAM usage is exceeding 30G