Add initial version with help and admission controller (#1)

- It adds a helm chart that will be hosted in the Github pages URL of this repository
- an admission controller operator 
- Basic documentation for installing the operator, configuring CRDs and example pod configuration

test/utils/utils.go

@@ -0,0 +1,174 @@
+/*
+Copyright 2025.
+
+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.
+*/
+
+package utils
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+
+	. "github.com/onsi/ginkgo/v2" //nolint:golint,revive
+)
+
+const (
+	certmanagerVersion = "v1.16.3"
+	certmanagerURLTmpl = "https://github.com/cert-manager/cert-manager/releases/download/%s/cert-manager.yaml"
+)
+
+func warnError(err error) {
+	_, _ = fmt.Fprintf(GinkgoWriter, "warning: %v\n", err)
+}
+
+// Run executes the provided command within this context
+func Run(cmd *exec.Cmd) (string, error) {
+	dir, _ := GetProjectDir()
+	cmd.Dir = dir
+
+	if err := os.Chdir(cmd.Dir); err != nil {
+		_, _ = fmt.Fprintf(GinkgoWriter, "chdir dir: %s\n", err)
+	}
+
+	cmd.Env = append(os.Environ(), "GO111MODULE=on")
+	command := strings.Join(cmd.Args, " ")
+	_, _ = fmt.Fprintf(GinkgoWriter, "running: %s\n", command)
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		return string(output), fmt.Errorf("%s failed with error: (%v) %s", command, err, string(output))
+	}
+
+	return string(output), nil
+}
+
+// UninstallCertManager uninstalls the cert manager
+func UninstallCertManager() {
+	url := fmt.Sprintf(certmanagerURLTmpl, certmanagerVersion)
+	cmd := exec.Command("kubectl", "delete", "-f", url)
+	if _, err := Run(cmd); err != nil {
+		warnError(err)
+	}
+
+	cmd = exec.Command(
+		"kubectl", "delete", "--ignore-not-found",
+		"leases.coordination.k8s.io",
+		"-n", "kube-system",
+		"cert-manager-controller", "cert-manager-cainjector-leader-election",
+	)
+
+	if _, err := Run(cmd); err != nil {
+		warnError(err)
+	}
+}
+
+// InstallCertManager installs the cert manager bundle.
+func InstallCertManager() error {
+	url := fmt.Sprintf(certmanagerURLTmpl, certmanagerVersion)
+	cmd := exec.Command("kubectl", "apply", "-f", url)
+	if _, err := Run(cmd); err != nil {
+		return err
+	}
+	// Wait for cert-manager-webhook to be ready, which can take time if cert-manager
+	// was re-installed after uninstalling on a cluster.
+	cmd = exec.Command("kubectl", "wait", "deployment.apps/cert-manager-webhook",
+		"--for", "condition=Available",
+		"--namespace", "cert-manager",
+		"--timeout", "5m",
+	)
+
+	_, err := Run(cmd)
+	if err != nil {
+		return err
+	}
+
+	cmd = exec.Command("kubectl", "wait", "leases/cert-manager-controller",
+		"--for", "jsonpath={.spec.holderIdentity}",
+		"-n", "kube-system",
+		"--timeout", "5m",
+	)
+
+	_, err = Run(cmd)
+	return err
+}
+
+// IsCertManagerCRDsInstalled checks if any Cert Manager CRDs are installed
+// by verifying the existence of key CRDs related to Cert Manager.
+func IsCertManagerCRDsInstalled() bool {
+	// List of common Cert Manager CRDs
+	certManagerCRDs := []string{
+		"certificates.cert-manager.io",
+		"issuers.cert-manager.io",
+		"clusterissuers.cert-manager.io",
+		"certificaterequests.cert-manager.io",
+		"orders.acme.cert-manager.io",
+		"challenges.acme.cert-manager.io",
+	}
+
+	// Execute the kubectl command to get all CRDs
+	cmd := exec.Command("kubectl", "get", "crds")
+	output, err := Run(cmd)
+	if err != nil {
+		return false
+	}
+
+	// Check if any of the Cert Manager CRDs are present
+	crdList := GetNonEmptyLines(output)
+	for _, crd := range certManagerCRDs {
+		for _, line := range crdList {
+			if strings.Contains(line, crd) {
+				return true
+			}
+		}
+	}
+
+	return false
+}
+
+// LoadImageToKindClusterWithName loads a local docker image to the kind cluster
+func LoadImageToKindClusterWithName(name string) error {
+	cluster := "kind"
+	if v, ok := os.LookupEnv("KIND_CLUSTER"); ok {
+		cluster = v
+	}
+	kindOptions := []string{"load", "docker-image", name, "--name", cluster}
+	cmd := exec.Command("kind", kindOptions...)
+	_, err := Run(cmd)
+	return err
+}
+
+// GetNonEmptyLines converts given command output string into individual objects
+// according to line breakers, and ignores the empty elements in it.
+func GetNonEmptyLines(output string) []string {
+	var res []string
+	elements := strings.Split(output, "\n")
+	for _, element := range elements {
+		if element != "" {
+			res = append(res, element)
+		}
+	}
+
+	return res
+}
+
+// GetProjectDir will return the directory where the project is
+func GetProjectDir() (string, error) {
+	wd, err := os.Getwd()
+	if err != nil {
+		return wd, err
+	}
+	wd = strings.Replace(wd, "/test/e2e", "", -1)
+	return wd, nil
+}