feat(refacto): move everything in internal package

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

internal/generator/labels/labelstructs/ingress.go

@@ -0,0 +1,41 @@
+package labelstructs
+
+import (
+	"fmt"
+	"github.com/katenary/katenary/internal/utils"
+
+	"gopkg.in/yaml.v3"
+)
+
+type TLS struct {
+	Enabled bool `yaml:"enabled" json:"enabled,omitempty"`
+}
+
+type Ingress struct {
+	Port        *int32            `yaml:"port,omitempty" json:"port,omitempty"`
+	Annotations map[string]string `yaml:"annotations,omitempty" jsonschema:"nullable" json:"annotations,omitempty"`
+	Hostname    string            `yaml:"hostname,omitempty" json:"hostname,omitempty"`
+	Path        *string           `yaml:"path,omitempty" json:"path,omitempty"`
+	Class       *string           `yaml:"class,omitempty" json:"class,omitempty" jsonschema:"default:-"`
+	Enabled     bool              `yaml:"enabled,omitempty" json:"enabled,omitempty"`
+	TLS         *TLS              `yaml:"tls,omitempty" json:"tls,omitempty"`
+}
+
+// IngressFrom creates a new Ingress from a compose service.
+func IngressFrom(data string) (*Ingress, error) {
+	mapping := Ingress{
+		Hostname: "",
+		Path:     utils.StrPtr("/"),
+		Enabled:  false,
+		Class:    utils.StrPtr("-"),
+		Port:     nil,
+		TLS:      &TLS{Enabled: true},
+	}
+	if err := yaml.Unmarshal([]byte(data), &mapping); err != nil {
+		return nil, err
+	}
+	if mapping.Port == nil {
+		return nil, fmt.Errorf("port is required in ingress definition")
+	}
+	return &mapping, nil
+}