Added krew validation pipeline

Author: vedit

.github/workflows/ci.yml

@@ -133,3 +133,58 @@ jobs:
       - name: Run integration tests
         run: |
           go test -v -tags=integration ./test/integration/... -timeout 10m
+
+  validate-krew-manifest:
+    name: Validate Krew Manifest
+    runs-on: ubuntu-latest
+    env:
+      KREW_VERSION: v0.4.5
+      GO111MODULE: on
+    steps:
+
+    - name: Setup Go
+      uses: actions/setup-go@v3
+      with:
+        go-version: '1.22'
+      id: go
+
+    - name: Go module cache
+      uses: actions/cache@v3
+      with:
+        path: ~/go/pkg/mod
+        key: ${{ runner.os }}-go-${{ env.KREW_VERSION }}
+        restore-keys: |
+          ${{ runner.os }}-go-
+
+    - name: Check out PR branch
+      uses: actions/checkout@v3
+      with:
+        fetch-depth: 0  # disable shallow clones
+    - name: Install kubectl
+      run: |
+        set -euo pipefail
+        sudo curl -fsSL -o /usr/bin/kubectl https://dl.k8s.io/release/v1.18.8/bin/linux/amd64/kubectl
+        sudo chmod +x /usr/bin/kubectl
+
+    - name: Install krew
+      run: |
+        set -euo pipefail
+        cd "$(mktemp -d)"
+        curl -fsSLO "https://github.com/kubernetes-sigs/krew/releases/download/${KREW_VERSION}/krew.yaml"
+        curl -fsSLO "https://github.com/kubernetes-sigs/krew/releases/download/${KREW_VERSION}/krew-linux_amd64.tar.gz"
+        tar zxvf krew-linux_amd64.tar.gz
+        ./krew-linux_amd64 install --manifest=krew.yaml --archive=krew-linux_amd64.tar.gz
+
+    - name: Install validate-krew-manifest plugin
+      run : |
+        set -euo pipefail
+        export GOBIN=$HOME/bin
+        go install sigs.k8s.io/krew/cmd/validate-krew-manifest@${KREW_VERSION}
+
+    - name: Validate updated plugin manifests
+      if: github.event_name == 'pull_request'
+      run : |
+        set -x
+        set -euo pipefail
+        export PATH="${KREW_ROOT:-$HOME/.krew}/bin:$PATH"
+        $HOME/bin/validate-krew-manifest -manifest .krew.yaml