/cluster: cleanup clientbin.sh

clientbin.sh is only used in kubectl.sh. It contains logic
for finding a binary that was build from the k/k tree
and for printing errors if the binary cannot be found.

- Remove clientbin.sh
- Remove references of clientbin.sh from /cluster/BUILD
- Use hack/lib/util.sh's kube::util::find-binary for finding the binary

cluster/BUILD

@@ -44,14 +44,6 @@ sh_test(
     ],
 )
 
-sh_test(
-    name = "clientbin_test",
-    srcs = ["clientbin.sh"],
-    deps = [
-        "//hack/lib",
-    ],
-)
-
 sh_test(
     name = "kube-util_test",
     srcs = ["kube-util.sh"],

cluster/clientbin.sh

@@ -1,110 +0,0 @@
-#!/usr/bin/env bash
-
-# Copyright 2016 The Kubernetes Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-set -o errexit
-set -o nounset
-set -o pipefail
-
-KUBE_ROOT=${KUBE_ROOT:-$(dirname "${BASH_SOURCE[0]}")/..}
-
-# Detect the OS name/arch so that we can find our binary
-case "$(uname -s)" in
-  Darwin)
-    host_os=darwin
-    ;;
-  Linux)
-    host_os=linux
-    ;;
-  *)
-    echo "Unsupported host OS.  Must be Linux or Mac OS X." >&2
-    exit 1
-    ;;
-esac
-
-case "$(uname -m)" in
-  x86_64*)
-    host_arch=amd64
-    ;;
-  i?86_64*)
-    host_arch=amd64
-    ;;
-  amd64*)
-    host_arch=amd64
-    ;;
-  arm*)
-    host_arch=arm
-    ;;
-  aarch64*)
-    host_arch=arm64
-    ;;
-  i?86*)
-    host_arch=386
-    ;;
-  s390x*)
-    host_arch=s390x
-    ;;
-  ppc64le*)
-    host_arch=ppc64le
-    ;;
-  *)
-    echo "Unsupported host arch. Must be x86_64, 386, arm, s390x or ppc64le." >&2
-    exit 1
-    ;;
-esac
-
-function get_bin() {
-  bin="${1:-}"
-  srcdir="${2:-}"
-  if [[ "${bin}" == "" ]]; then
-    echo "Binary name is required"
-    exit 1
-  fi
-  if [[ "${srcdir}" == "" ]]; then
-    echo "Source directory path is required"
-    exit 1
-  fi
-
-  locations=(
-    "${KUBE_ROOT}/_output/bin/${bin}"
-    "${KUBE_ROOT}/_output/dockerized/bin/${host_os}/${host_arch}/${bin}"
-    "${KUBE_ROOT}/_output/local/bin/${host_os}/${host_arch}/${bin}"
-    "${KUBE_ROOT}/platforms/${host_os}/${host_arch}/${bin}"
-  )
-  # Also search for binary in bazel build tree.
-  # The bazel go rules place binaries in subtrees like
-  # "bazel-bin/source/path/linux_amd64_pure_stripped/binaryname", so make sure
-  # the platform name is matched in the path.
-  while IFS=$'\n' read -r line; do
-    locations+=( "${line}" )
-  done < <(find "${KUBE_ROOT}/bazel-bin/${srcdir}" -type f -executable \
-    -path "*/${host_os}_${host_arch}*/${bin}" 2>/dev/null || true)
-  
-  (ls -t "${locations[@]}" 2>/dev/null || true) | head -1
-}
-
-function print_error() {
-  {
-    echo "It looks as if you don't have a compiled ${1:-} binary"
-    echo
-    echo "If you are running from a clone of the git repo, please run"
-    echo "'./build/run.sh make cross'. Note that this requires having"
-    echo "Docker installed."
-    echo
-    echo "If you are running from a binary release tarball, something is wrong. "
-    echo "Look at http://kubernetes.io/ for information on how to contact the "
-    echo "development team for help."
-  } >&2
-}

cluster/kubectl.sh

@@ -32,15 +32,25 @@ set -o pipefail
 
 KUBE_ROOT=${KUBE_ROOT:-$(dirname "${BASH_SOURCE[0]}")/..}
 source "${KUBE_ROOT}/cluster/kube-util.sh"
-source "${KUBE_ROOT}/cluster/clientbin.sh"
+source "${KUBE_ROOT}/hack/lib/util.sh"
 
 # If KUBECTL_PATH isn't set, gather up the list of likely places and use ls
 # to find the latest one.
 if [[ -z "${KUBECTL_PATH:-}" ]]; then
-  kubectl=$( get_bin "kubectl" "cmd/kubectl" )
+  kubectl=$( kube::util::find-binary "kubectl" )
 
   if [[ ! -x "$kubectl" ]]; then
-    print_error "kubectl"
+    {
+      echo "It looks as if you don't have a compiled kubectl binary"
+      echo
+      echo "If you are running from a clone of the git repo, please run"
+      echo "'./build/run.sh make cross'. Note that this requires having"
+      echo "Docker installed."
+      echo
+      echo "If you are running from a binary release tarball, something is wrong. "
+      echo "Look at http://kubernetes.io/ for information on how to contact the "
+      echo "development team for help."
+    } >&2
     exit 1
   fi
 elif [[ ! -x "${KUBECTL_PATH}" ]]; then