feat(refacto): move everything in internal package

This allows to install katenary with `go install` and to clean up the
project folder.

internal/generator/service.go

@@ -0,0 +1,96 @@
+package generator
+
+import (
+	"fmt"
+	"github.com/katenary/katenary/internal/utils"
+	"regexp"
+	"strings"
+
+	"github.com/compose-spec/compose-go/types"
+	v1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/util/intstr"
+)
+
+var _ Yaml = (*Service)(nil)
+
+// Service is a kubernetes Service.
+type Service struct {
+	*v1.Service `yaml:",inline"`
+	service     *types.ServiceConfig `yaml:"-"`
+}
+
+// NewService creates a new Service from a compose service.
+func NewService(service types.ServiceConfig, appName string) *Service {
+	ports := []v1.ServicePort{}
+
+	s := &Service{
+		service: &service,
+		Service: &v1.Service{
+			TypeMeta: metav1.TypeMeta{
+				Kind:       "Service",
+				APIVersion: "v1",
+			},
+			ObjectMeta: metav1.ObjectMeta{
+				Name:        utils.TplName(service.Name, appName),
+				Labels:      GetLabels(service.Name, appName),
+				Annotations: Annotations,
+			},
+			Spec: v1.ServiceSpec{
+				Selector: GetMatchLabels(service.Name, appName),
+				Ports:    ports,
+			},
+		},
+	}
+	for _, port := range service.Ports {
+		s.AddPort(port)
+	}
+
+	return s
+}
+
+// AddPort adds a port to the service.
+func (s *Service) AddPort(port types.ServicePortConfig, serviceName ...string) {
+	var name string
+	var finalport intstr.IntOrString
+
+	if targetPort := utils.GetServiceNameByPort(int(port.Target)); targetPort == "" {
+		finalport = intstr.FromInt(int(port.Target))
+		name = fmt.Sprintf("port-%d", port.Target)
+	} else {
+		finalport = intstr.FromString(targetPort)
+		name = targetPort
+	}
+
+	s.Spec.Ports = append(s.Spec.Ports, v1.ServicePort{
+		Protocol:   v1.ProtocolTCP,
+		Port:       int32(port.Target),
+		TargetPort: finalport,
+		Name:       name,
+	})
+}
+
+// Filename returns the filename of the service.
+func (s *Service) Filename() string {
+	return s.service.Name + ".service.yaml"
+}
+
+// Yaml returns the yaml representation of the service.
+func (s *Service) Yaml() ([]byte, error) {
+	var y []byte
+	var err error
+	if y, err = ToK8SYaml(s); err != nil {
+		return nil, err
+	}
+
+	lines := []string{}
+	for line := range strings.SplitSeq(string(y), "\n") {
+		if regexp.MustCompile(`^\s*loadBalancer:\s*`).MatchString(line) {
+			continue
+		}
+		lines = append(lines, line)
+	}
+	y = []byte(strings.Join(lines, "\n"))
+
+	return y, err
+}