fix: fixes retrocompatibility with namespaces by using fs.Register (#105)

* fix: fixes retrocompatibility with namespaces by using fs.Register instead on fs.RegisterWithNamespace when the namespace is default.

* chore: tweaks the default namespace check.

Author: jcchavezs

example/statik/statik.go

@@ -45,10 +45,18 @@ type statikFS struct {
 	dirs  map[string][]string
 }
 
+const defaultNamespace = "default"
+
+// IsDefaultNamespace returns true if the assetNamespace is
+// the default one
+func IsDefaultNamespace(assetNamespace string) bool {
+	return assetNamespace == defaultNamespace
+}
+
 // Register registers zip contents data, later used to initialize
 // the statik file system.
 func Register(data string) {
-	RegisterWithNamespace("default", data)
+	RegisterWithNamespace(defaultNamespace, data)
 }
 
 // RegisterWithNamespace registers zip contents data and set asset namespace,
@@ -60,7 +68,7 @@ func RegisterWithNamespace(assetNamespace string, data string) {
 // New creates a new file system with the default registered zip contents data.
 // It unzips all files and stores them in an in-memory map.
 func New() (http.FileSystem, error) {
-	return NewWithNamespace("default")
+	return NewWithNamespace(defaultNamespace)
 }
 
 // NewWithNamespace creates a new file system with the registered zip contents data.

fs/fs.go

@@ -30,6 +30,8 @@ import (
 	"strings"
 	"time"
 	"unicode"
+
+	"github.com/rakyll/statik/fs"
 )
 
 const nameSourceFile = "statik.go"
@@ -279,7 +281,7 @@ import (
 )
 
 `, tags, comment, namePackage)
-	if assetNamespace != "default" {
+	if !fs.IsDefaultNamespace(assetNamespace) {
 		fmt.Fprintf(&qb, `
 const %s = "%s" // static asset namespace
 `, assetNamespaceIdentify, assetNamespace)
@@ -288,10 +290,18 @@ const %s = "%s" // static asset namespace
 func init() {
 	data := "`)
 	FprintZipData(&qb, buffer.Bytes())
-	fmt.Fprintf(&qb, `"
-	fs.RegisterWithNamespace("%s", data)
-}
-`, assetNamespace)
+	if fs.IsDefaultNamespace(assetNamespace) {
+		fmt.Fprint(&qb, `"
+		fs.Register(data)
+	}
+	`)
+
+	} else {
+		fmt.Fprintf(&qb, `"
+		fs.RegisterWithNamespace("%s", data)
+	}
+	`, assetNamespace)
+	}
 
 	if err = ioutil.WriteFile(f.Name(), qb.Bytes(), 0644); err != nil {
 		return