Reimplement kubectl plugin release workflow (#8812)

* Feat: reimplement kubectl plugin release system

This commit does the following changes:
- Add GitHub Actions pipeline for releasing the plugin
- Removes the build/build-plugin.sh and replaces this with GoReleaser
- Adds the use of krew-release-bot for automatically updating the krew
  release
- Removes the make target for build/build-plugin.sh

Signed-off-by: Ismayil Mirzali <ismayilmirzeli@gmail.com>

* Fix: pin github actions stages with commit sha

Signed-off-by: Ismayil Mirzali <ismayilmirzeli@gmail.com>

Signed-off-by: Ismayil Mirzali <ismayilmirzeli@gmail.com>

.github/workflows/plugin.yaml

@@ -0,0 +1,37 @@
+name: kubectl plugin
+
+on:
+  push:
+    branches:
+      - "main"
+    paths:
+      - "cmd/plugin/**"
+    tags:
+      - "v*"
+
+jobs:
+  release-plugin:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b # v3.0.2
+        with:
+          fetch-depth: 0
+
+      - name: Set up Go
+        uses: actions/setup-go@b22fbbc2921299758641fab08929b4ac52b32923 # v3.2.0
+        with:
+          go-version: 1.18
+
+      - name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@68acf3b1adf004ac9c2f0a4259e85c5f66e99bef # v3.0.0
+        with:
+          version: latest
+          args: release --rm-dist
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Update new version in krew-index
+        uses: rajatjindal/krew-release-bot@92da038bbf995803124a8e50ebd438b2f37bbbb0 # v0.0.43
+        with:
+          krew_template_file: cmd/plugin/krew.yaml

.goreleaser.yaml

@@ -0,0 +1,29 @@
+project_name: ingress-nginx
+release:
+  github:
+    owner: kubernetes
+    name: ingress-nginx
+builds:
+  - id: ingress-nginx
+    goos:
+    - darwin
+    - linux
+    - windows
+    goarch:
+    - arm64
+    - amd64
+    env:
+    - CGO_ENABLED=0
+    - GO111MODULE=on
+    main: cmd/plugin/main.go
+    binary: kubectl-ingress-nginx
+    ldflags: |
+      -s -w
+      -X k8s.io/ingress-nginx/version.COMMIT={{ .Commit }}
+      -X k8s.io/ingress-nginx/version.RELEASE={{ .Tag }}
+archives:
+  - id: ingress-nginx
+    builds:
+    - ingress-nginx
+    name_template: "kubectl-{{ .ProjectName }}_{{ .Os }}_{{ .Arch }}"
+    format: tar.gz

Makefile

@@ -127,18 +127,6 @@ build:  ## Build ingress controller, debug tool and pre-stop hook.
 		build/build.sh
 
 
-.PHONY: build-plugin
-build-plugin:  ## Build ingress-nginx krew plugin.
-	@build/run-in-docker.sh \
-		PKG=$(PKG) \
-		MAC_OS=$(MAC_OS) \
-		ARCH=$(ARCH) \
-		COMMIT_SHA=$(COMMIT_SHA) \
-		REPO_INFO=$(REPO_INFO) \
-		TAG=$(TAG) \
-		build/build-plugin.sh
-
-
 .PHONY: clean
 clean: ## Remove .gocache directory.
 	rm -rf bin/ .gocache/ .cache/

build/build-plugin.sh

@@ -1,84 +0,0 @@
-#!/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.
-
-if [ -n "$DEBUG" ]; then
-	set -x
-fi
-
-set -o errexit
-set -o nounset
-set -o pipefail
-
-declare -a mandatory
-mandatory=(
-  PKG
-  ARCH
-  COMMIT_SHA
-  REPO_INFO
-  TAG
-)
-
-missing=false
-for var in "${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
-  extension=$3
-
-  echo "> building targets for ${os}-${arch}"
-
-  env GOOS="${os}" GOARCH="${arch}" go build \
-    ${GOBUILD_FLAGS} \
-    -trimpath -ldflags="-buildid= -w -s \
-      -X ${PKG}/version.RELEASE=${TAG} \
-      -X ${PKG}/version.COMMIT=${COMMIT_SHA} \
-      -X ${PKG}/version.REPO=${REPO_INFO}" \
-    -o "${release}/kubectl-ingress_nginx${extension}" "${PKG}/cmd/plugin"
-
-    cp LICENSE ${release}
-    tar -C "${release}" -zcvf "${release}/kubectl-ingress_nginx-${os}-${arch}.tar.gz" "kubectl-ingress_nginx${extension}" LICENSE
-    rm "${release}/kubectl-ingress_nginx${extension}"
-    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
-
-echo "Generated targets in ${release} directory."
-
-build_for_arch darwin amd64 ''
-build_for_arch darwin arm64 ''
-build_for_arch linux amd64 ''
-build_for_arch windows amd64 '.exe'

cmd/plugin/ingress-nginx.yaml.tmpl

@@ -1,51 +0,0 @@
-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%%%
-  homepage: https://kubernetes.github.io/ingress-nginx/kubectl-plugin/
-  platforms:
-  - uri: https://github.com/kubernetes/ingress-nginx/releases/download/nginx-%%%tag%%%/kubectl-ingress_nginx-darwin-arm64.tar.gz
-    sha256: %%%shasum_darwin_arm64%%%
-    files:
-    - from: "*"
-      to: "."
-    bin: "./kubectl-ingress_nginx"
-    selector:
-      matchLabels:
-        os: darwin
-        arch: arm64
-  - 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.exe"
-    selector:
-      matchLabels:
-        os: windows
-        arch: amd64

cmd/plugin/krew.yaml

@@ -0,0 +1,41 @@
+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: {{ .TagName }}
+  homepage: https://kubernetes.github.io/ingress-nginx/kubectl-plugin/
+  platforms:
+  - selector:
+      matchLabels:
+        os: darwin
+        arch: arm64
+    {{addURIAndSha "https://github.com/kubernetes/ingress-nginx/releases/download/{{ .TagName }}/kubectl-ingress-nginx_darwin_arm64.tar.gz" .TagName }}
+    bin: kubectl-ingress-nginx
+  - selector:
+      matchLabels:
+        os: darwin
+        arch: amd64
+    {{addURIAndSha "https://github.com/kubernetes/ingress-nginx/releases/download/{{ .TagName }}/kubectl-ingress-nginx_darwin_amd64.tar.gz" .TagName }}
+    bin: kubectl-ingress-nginx
+    selector:
+      matchLabels:
+        os: linux
+        arch: amd64
+    {{addURIAndSha "https://github.com/kubernetes/ingress-nginx/releases/download/{{ .TagName }}/kubectl-ingress-nginx_linux_amd64.tar.gz" .TagName }}
+    bin: kubectl-ingress-nginx
+  - selector:
+      matchLabels:
+        os: linux
+        arch: arm64
+    {{addURIAndSha "https://github.com/kubernetes/ingress-nginx/releases/download/{{ .TagName }}/kubectl-ingress-nginx_linux_arm64.tar.gz" .TagName }}
+    bin: kubectl-ingress-nginx
+  - selector:
+      matchLabels:
+        os: windows
+        arch: amd64
+    {{addURIAndSha "https://github.com/kubernetes/ingress-nginx/releases/download/{{ .TagName }}/kubectl-ingress-nginx_windows_amd64.tar.gz" .TagName }}
+    bin: kubectl-ingress-nginx.exe