Use compose-go + improvements (#9)

Use compose-go https://github.com/compose-spec/compose-go  to make Katenary parsing compose file the official way.
Add labels:
- `volume-from` (with `same-pod`) to avoid volume repetition
- `ignore` to ignore a service
- `mapenv` (replaces the `env-to-service`) to map environment to helm variable (as a template string)
- `secret-vars` declares variables as secret values

More:
- Now, environment (as secret vars) are set in values.yaml
- Ingress has got annotations in values.yaml
- Probes (liveness probe) are improved
- fixed code to optimize
- many others fixes about path, bad volume check, refactorisation, tests...

helm/storage.go

@@ -1,17 +1,40 @@
 package helm
 
+import "sync"
+
+var (
+	made   = make(map[string]bool)
+	locker = sync.Mutex{}
+)
+
+// ResetMadePVC resets the cache of made PVCs.
+// Useful in tests only.
+func ResetMadePVC() {
+	locker.Lock()
+	defer locker.Unlock()
+	made = make(map[string]bool)
+}
+
+// Storage is a struct for a PersistentVolumeClaim.
 type Storage struct {
 	*K8sBase `yaml:",inline"`
 	Spec     *PVCSpec
 }
 
+// NewPVC creates a new PersistentVolumeClaim object.
 func NewPVC(name, storageName string) *Storage {
+	locker.Lock()
+	defer locker.Unlock()
+	if _, ok := made[name+storageName]; ok {
+		return nil
+	}
+	made[name+storageName] = true
 	pvc := &Storage{}
 	pvc.K8sBase = NewBase()
 	pvc.K8sBase.Kind = "PersistentVolumeClaim"
 	pvc.K8sBase.Metadata.Labels[K+"/pvc-name"] = storageName
 	pvc.K8sBase.ApiVersion = "v1"
-	pvc.K8sBase.Metadata.Name = RELEASE_NAME + "-" + storageName
+	pvc.K8sBase.Metadata.Name = ReleaseNameTpl + "-" + storageName
 	pvc.K8sBase.Metadata.Labels[K+"/component"] = name
 	pvc.Spec = &PVCSpec{
 		Resouces: map[string]interface{}{
@@ -24,6 +47,7 @@ func NewPVC(name, storageName string) *Storage {
 	return pvc
 }
 
+// PVCSpec is a struct for a PersistentVolumeClaim spec.
 type PVCSpec struct {
 	Resouces    map[string]interface{} `yaml:"resources"`
 	AccessModes []string               `yaml:"accessModes"`