Add command to render a Go template with config and state as data context

Signed-off-by: Denis Luchkin-Zhou <wyvernzora@gmail.com>

pkg/action/render_template_test.go

@@ -0,0 +1,38 @@
+package action
+
+import (
+	"fmt"
+	agentConfig "github.com/kairos-io/kairos-agent/v2/pkg/config"
+	"github.com/kairos-io/kairos-sdk/collector"
+	"github.com/kairos-io/kairos-sdk/state"
+	"gopkg.in/yaml.v3"
+	"os"
+
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("RenderTemplate action test", func() {
+
+	It("renders the template with config and state", func() {
+		config := agentConfig.NewConfig()
+		config.Config = collector.Config{
+			"testKey": "testValue",
+		}
+		runtime, err := state.NewRuntime()
+
+		fmt.Println(os.Getwd())
+
+		result, err := RenderTemplate("../../tests/fixtures/template/test.yaml", config, runtime)
+		Expect(err).ToNot(HaveOccurred())
+		Expect(result).ToNot(BeNil())
+		Expect(len(result)).ToNot(BeZero())
+
+		var data map[string]string
+		err = yaml.Unmarshal(result, &data)
+		Expect(err).ToNot(HaveOccurred())
+		Expect(data).To(HaveKeyWithValue("configTest", "TESTVALUE"))
+		Expect(data["stateTest"]).To(MatchRegexp("^[0-9a-f]{8}$"))
+	})
+
+})