Add kubectl plugin

Gopkg.toml

@@ -118,3 +118,7 @@
 [[constraint]]
   name = "k8s.io/apiserver"
   revision = "kubernetes-1.13.3"
+
+[[constraint]]
+  name = "k8s.io/cli-runtime"
+  revision = "kubernetes-1.13.3"

Makefile

@@ -153,6 +153,12 @@ build:
 	GOBUILD_FLAGS="$(GOBUILD_FLAGS)" \
 	build/go-in-docker.sh build/build.sh
 
+.PHONY: build-plugin
+build-plugin:
+	@$(DEF_VARS) \
+	GOBUILD_FLAGS="$(GOBUILD_FLAGS)" \
+	build/go-in-docker.sh build/build-plugin.sh
+
 .PHONY: clean
 clean:
 	rm -rf bin/ .gocache/ .env

build/build-plugin.sh

@@ -0,0 +1,73 @@
+#!/bin/bash
+
+# Copyright 2018 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
+
+declare -a mandatory
+mandatory=(
+  PKG
+  ARCH
+  GIT_COMMIT
+  REPO_INFO
+  TAG
+)
+
+missing=false
+for var in "${mandatory[@]}"; do
+  if [[ -z "${!var:-}" ]]; then
+    echo "Environment variable $var must be set"
+    missing=true
+  fi
+done
+
+if [ "$missing" = true ]; then
+  exit 1
+fi
+
+export CGO_ENABLED=0
+
+release=cmd/plugin/release
+
+function build_for_arch(){
+  os=$1
+  arch=$2
+
+  env GOOS=${os} GOARCH=${arch} go build \
+    ${GOBUILD_FLAGS} \
+    -ldflags "-s -w \
+        -X ${PKG}/version.RELEASE=${TAG} \
+        -X ${PKG}/version.COMMIT=${GIT_COMMIT} \
+        -X ${PKG}/version.REPO=${REPO_INFO}" \
+    -o ${release}/kubectl-ingress_nginx ${PKG}/cmd/plugin
+
+    tar -C ${release} -zcvf ${release}/kubectl-ingress_nginx-${os}-${arch}.tar.gz kubectl-ingress_nginx
+    rm ${release}/kubectl-ingress_nginx
+    hash=`sha256sum ${release}/kubectl-ingress_nginx-${os}-${arch}.tar.gz | awk '{ print $1 }'`
+    sed -i "s/%%%shasum_${os}_${arch}%%%/${hash}/g" ${release}/ingress-nginx.yaml
+}
+
+rm -rf ${release}
+mkdir ${release}
+
+cp cmd/plugin/ingress-nginx.yaml.tmpl ${release}/ingress-nginx.yaml
+
+sed -i "s/%%%tag%%%/${TAG}/g" ${release}/ingress-nginx.yaml
+
+build_for_arch darwin amd64
+build_for_arch linux amd64
+build_for_arch windows amd64

cmd/plugin/ingress-nginx.yaml.tmpl

@@ -0,0 +1,40 @@
+apiVersion: krew.googlecontainertools.github.com/v1alpha2
+kind: Plugin
+metadata:
+  name: ingress-nginx
+spec:
+  shortDescription: Interact with ingress-nginx
+  description: |
+    The official kubectl plugin for ingress-nginx.
+  version: %%%tag%%%
+  platforms:
+  - uri: https://github.com/kubernetes/ingress-nginx/releases/download/nginx-%%%tag%%%/kubectl-ingress_nginx-darwin-amd64.tar.gz
+    sha256: %%%shasum_darwin_amd64%%%
+    files:
+    - from: "*"
+      to: "."
+    bin: "./kubectl-ingress_nginx"
+    selector:
+      matchLabels:
+        os: darwin
+        arch: amd64
+  - uri: https://github.com/kubernetes/ingress-nginx/releases/download/nginx-%%%tag%%%/kubectl-ingress_nginx-linux-amd64.tar.gz
+    sha256: %%%shasum_linux_amd64%%%
+    files:
+    - from: "*"
+      to: "."
+    bin: "./kubectl-ingress_nginx"
+    selector:
+      matchLabels:
+        os: linux
+        arch: amd64
+  - uri: https://github.com/kubernetes/ingress-nginx/releases/download/nginx-%%%tag%%%/kubectl-ingress_nginx-windows-amd64.tar.gz
+    sha256: %%%shasum_windows_amd64%%%
+    files:
+    - from: "*"
+      to: "."
+    bin: "./kubectl-ingress_nginx"
+    selector:
+      matchLabels:
+        os: windows
+        arch: amd64