Remove dependency of go-bindata (#818)

* Use new embed functionality for serving UI assets

* Use new embed functionality for serving resources. Remove dependency on go-bindata

* Remove Go 1.15

server/app/app.go

@@ -10,12 +10,12 @@ import (
 	"github.com/go-chi/chi"
 	"github.com/go-chi/httprate"
 	"github.com/go-chi/jwtauth"
-	"github.com/navidrome/navidrome/assets"
 	"github.com/navidrome/navidrome/conf"
 	"github.com/navidrome/navidrome/core/auth"
 	"github.com/navidrome/navidrome/log"
 	"github.com/navidrome/navidrome/model"
 	"github.com/navidrome/navidrome/server/events"
+	"github.com/navidrome/navidrome/ui"
 )
 
 type Router struct {
@@ -77,8 +77,8 @@ func (app *Router) routes(path string) http.Handler {
 	})
 
 	// Serve UI app assets
-	r.Handle("/", serveIndex(app.ds, assets.AssetFile()))
-	r.Handle("/*", http.StripPrefix(path, http.FileServer(assets.AssetFile())))
+	r.Handle("/", serveIndex(app.ds, ui.Assets()))
+	r.Handle("/*", http.StripPrefix(path, http.FileServer(http.FS(ui.Assets()))))
 
 	return r
 }

server/app/serve_index.go

@@ -3,6 +3,7 @@ package app
 import (
 	"encoding/json"
 	"html/template"
+	"io/fs"
 	"io/ioutil"
 	"net/http"
 	"strings"
@@ -15,7 +16,7 @@ import (
 )
 
 // Injects the config in the `index.html` template
-func serveIndex(ds model.DataStore, fs http.FileSystem) http.HandlerFunc {
+func serveIndex(ds model.DataStore, fs fs.FS) http.HandlerFunc {
 	policy := bluemonday.UGCPolicy()
 	return func(w http.ResponseWriter, r *http.Request) {
 		c, err := ds.User(r.Context()).CountAll()
@@ -61,7 +62,7 @@ func serveIndex(ds model.DataStore, fs http.FileSystem) http.HandlerFunc {
 	}
 }
 
-func getIndexTemplate(r *http.Request, fs http.FileSystem) (*template.Template, error) {
+func getIndexTemplate(r *http.Request, fs fs.FS) (*template.Template, error) {
 	t := template.New("initial state")
 	indexHtml, err := fs.Open("index.html")
 	if err != nil {

server/app/serve_index_test.go

@@ -3,8 +3,8 @@ package app
 import (
 	"encoding/json"
 	"fmt"
-	"net/http"
 	"net/http/httptest"
+	"os"
 	"regexp"
 	"strconv"
 
@@ -19,7 +19,7 @@ import (
 var _ = Describe("serveIndex", func() {
 	var ds model.DataStore
 	mockUser := &mockedUserRepo{}
-	fs := http.Dir("tests/fixtures")
+	fs := os.DirFS("tests/fixtures")
 
 	BeforeEach(func() {
 		ds = &tests.MockDataStore{MockedUser: mockUser}

server/app/translations.go

@@ -31,7 +31,7 @@ var (
 
 func newTranslationRepository(context.Context) rest.Repository {
 	dir := utils.NewMergeFS(
-		resources.AssetFile(),
+		http.FS(resources.Assets()),
 		http.Dir(filepath.Join(conf.Server.DataFolder, "resources")),
 	)
 	if err := loadTranslations(dir); err != nil {

server/app/translations_test.go

@@ -16,7 +16,7 @@ var _ = Describe("Translations", func() {
 	Describe("I18n files", func() {
 		var fs http.FileSystem
 		BeforeEach(func() {
-			fs = resources.AssetFile()
+			fs = http.FS(resources.Assets())
 		})
 		It("contains only valid json language files", func() {
 			dir, _ := fs.Open(consts.I18nFolder)