Reimplement kubectl plugin release workflow (kubernetes#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 <[email protected]>

* Fix: pin github actions stages with commit sha

Signed-off-by: Ismayil Mirzali <[email protected]>

Signed-off-by: Ismayil Mirzali <[email protected]>

.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/

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