Add automatic namespace provisioning before deployment

Author: AryanSharma9917

pkg/deploy/deploy.go

@@ -9,14 +9,22 @@ func Run(envName string, dryRun bool) error {
 		return err
 	}
 
-	////////////////////////////////////////////////////
-	// PREFLIGHT FIRST
-	////////////////////////////////////////////////////
+	////////////////////////////////////
+	// PREFLIGHT
+	////////////////////////////////////
 
 	if err := Preflight(environment); err != nil {
 		return err
 	}
 
+	////////////////////////////////////
+	// ENSURE NAMESPACE
+	////////////////////////////////////
+
+	if err := EnsureNamespace(environment); err != nil {
+		return err
+	}
+
 	command, _, err := BuildCommand(environment)
 	if err != nil {
 		return err

pkg/deploy/namespace.go

@@ -0,0 +1,65 @@
+package deploy
+
+import (
+	"fmt"
+	"os/exec"
+
+	"github.com/aryansharma9917/codewise-cli/pkg/env"
+)
+
+func namespaceExists(namespace string, context string) bool {
+
+	args := []string{"get", "ns", namespace}
+
+	if context != "" {
+		args = append(args, "--context", context)
+	}
+
+	cmd := exec.Command("kubectl", args...)
+
+	if err := cmd.Run(); err != nil {
+		return false
+	}
+
+	return true
+}
+
+func createNamespace(namespace string, context string) error {
+
+	args := []string{"create", "ns", namespace}
+
+	if context != "" {
+		args = append(args, "--context", context)
+	}
+
+	cmd := exec.Command("kubectl", args...)
+
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("failed to create namespace: %s", string(output))
+	}
+
+	return nil
+}
+
+func EnsureNamespace(environment *env.Env) error {
+
+	ns := environment.K8s.Namespace
+	ctx := environment.K8s.Context
+
+	fmt.Printf("Checking namespace \"%s\"...\n", ns)
+
+	if namespaceExists(ns, ctx) {
+		fmt.Println("Namespace exists")
+		return nil
+	}
+
+	fmt.Println("Namespace not found. Creating namespace...")
+
+	if err := createNamespace(ns, ctx); err != nil {
+		return err
+	}
+
+	fmt.Println("Namespace created")
+	return nil
+}