chore: adding configuration file env vars

src/services/k8s/knative.go

@@ -7,7 +7,10 @@ import (
 	"path"
 	"text/template"
 	"time"
-
+    "strings"
+	"bufio"
+	"os"
+
 	"github.com/charmbracelet/log"
 	"github.com/nearform/initium-cli/src/services/docker"
 	"github.com/nearform/initium-cli/src/services/project"
@@ -105,6 +108,60 @@ func Apply(namespace string, config *rest.Config, project *project.Project, dock
 		return fmt.Errorf("cannot create namespace %s, failed with %v", serviceManifest.ObjectMeta.Namespace, err)
 	}
 
+	if _, err := os.Stat(".env"); err != nil {
+        if os.IsNotExist(err) {
+			log.Info("No environment variables file (.env) to Load!")
+        } else {
+            log.Fatalf("Error checking .env file: %v", err)
+        } 
+	} else {
+		log.Info("Environment variables file (.env) found! Loading..")
+		file, err := os.Open(".env")
+		if err != nil {
+			log.Fatalf("Error opening .env file: %v", err)
+		}
+		defer file.Close()
+
+		scanner := bufio.NewScanner(file)
+		envVariables := make(map[string]string)
+
+		checkFormat := func(line string) bool {
+			parts := strings.SplitN(line, "=", 2)
+			return len(parts) == 2
+		}
+
+		for scanner.Scan() {
+			line := scanner.Text()
+				if checkFormat(line) {
+				parts := strings.SplitN(line, "=", 2)
+				key := strings.TrimSpace(parts[0])
+				value := strings.TrimSpace(parts[1])
+					envVariables[key] = value
+			} else {
+				log.Warnf("Environment variables file (.env) line won't be processed due to invalid format: %s. Accepted: KEY=value", line)
+			}
+		}
+
+		if err := scanner.Err(); err != nil {
+			log.Errorf("Error reading environment variables file (.env): %v", err)
+		}
+
+		if len(envVariables) > 0 {
+			var envVarList []corev1.EnvVar
+			for key, value := range envVariables {
+				envVar := corev1.EnvVar{
+					Name:  key,
+					Value: value,
+				}
+				envVarList = append(envVarList, envVar)
+			}
+			serviceManifest.Spec.Template.Spec.Containers[0].Env = append(serviceManifest.Spec.Template.Spec.Containers[0].Env, envVarList...)
+			log.Info("Environment variables file (.env) content is now loaded!")
+		} else {
+			log.Warnf("Environment file (.env) is empty, Nothing to load!")
+		}
+	}
+
 	service, err := servingClient.Services(serviceManifest.ObjectMeta.Namespace).Get(ctx, serviceManifest.ObjectMeta.Name, metav1.GetOptions{})
 	var deployedService *servingv1.Service
 	if err != nil {