feat(libhelm) import libhelm into CE pkg directory [EE-4650] (#8138)

* import libhelm and update some paths

* remove file

* update readme

pkg/libhelm/binary/install_test.go

@@ -0,0 +1,118 @@
+package binary
+
+import (
+	"os"
+	"os/exec"
+	"path/filepath"
+	"testing"
+
+	"github.com/portainer/portainer/pkg/libhelm/options"
+	"github.com/stretchr/testify/assert"
+)
+
+func createValuesFile(values string) (string, error) {
+	file, err := os.CreateTemp("", "helm-values")
+	if err != nil {
+		return "", err
+	}
+
+	_, err = file.WriteString(values)
+	if err != nil {
+		file.Close()
+		return "", err
+	}
+
+	err = file.Close()
+	if err != nil {
+		return "", err
+	}
+
+	return file.Name(), nil
+}
+
+// getHelmBinaryPath is helper function to get local helm binary path (if helm is in path)
+func getHelmBinaryPath() (string, error) {
+	path, err := exec.LookPath("helm")
+	if err != nil {
+		return "", err
+	}
+	dir, err := filepath.Abs(filepath.Dir(path))
+	if err != nil {
+		return "", err
+	}
+	return dir, nil
+}
+
+func Test_Install(t *testing.T) {
+	ensureIntegrationTest(t)
+	is := assert.New(t)
+
+	path, err := getHelmBinaryPath()
+	is.NoError(err, "helm binary must exist in path to run tests")
+
+	hbpm := NewHelmBinaryPackageManager(path)
+
+	t.Run("successfully installs nginx chart with name test-nginx", func(t *testing.T) {
+		// helm install test-nginx --repo https://charts.bitnami.com/bitnami nginx
+		installOpts := options.InstallOptions{
+			Name:  "test-nginx",
+			Chart: "nginx",
+			Repo:  "https://charts.bitnami.com/bitnami",
+		}
+
+		release, err := hbpm.Install(installOpts)
+		defer hbpm.run("uninstall", []string{"test-nginx"})
+
+		is.NoError(err, "should successfully install release", release)
+	})
+
+	t.Run("successfully installs nginx chart with generated name", func(t *testing.T) {
+		// helm install --generate-name --repo https://charts.bitnami.com/bitnami nginx
+		installOpts := options.InstallOptions{
+			Chart: "nginx",
+			Repo:  "https://charts.bitnami.com/bitnami",
+		}
+		release, err := hbpm.Install(installOpts)
+		defer hbpm.run("uninstall", []string{release.Name})
+
+		is.NoError(err, "should successfully install release", release)
+	})
+
+	t.Run("successfully installs nginx with values", func(t *testing.T) {
+		// helm install test-nginx-2 --repo https://charts.bitnami.com/bitnami nginx --values /tmp/helm-values3161785816
+		values, err := createValuesFile("service:\n  port:  8081")
+		is.NoError(err, "should create a values file")
+
+		defer os.Remove(values)
+
+		installOpts := options.InstallOptions{
+			Name:       "test-nginx-2",
+			Chart:      "nginx",
+			Repo:       "https://charts.bitnami.com/bitnami",
+			ValuesFile: values,
+		}
+		release, err := hbpm.Install(installOpts)
+		defer hbpm.run("uninstall", []string{"test-nginx-2"})
+
+		is.NoError(err, "should successfully install release", release)
+	})
+
+	t.Run("successfully installs portainer chart with name portainer-test", func(t *testing.T) {
+		// helm install portainer-test portainer --repo https://portainer.github.io/k8s/
+		installOpts := options.InstallOptions{
+			Name:  "portainer-test",
+			Chart: "portainer",
+			Repo:  "https://portainer.github.io/k8s/",
+		}
+		release, err := hbpm.Install(installOpts)
+		defer hbpm.run("uninstall", []string{installOpts.Name})
+
+		is.NoError(err, "should successfully install release", release)
+	})
+}
+
+func ensureIntegrationTest(t *testing.T) {
+	if _, ok := os.LookupEnv("INTEGRATION_TEST"); !ok {
+		t.Skip("skip an integration test")
+	}
+}