Use embed package for binary assets instead of generated files

generate.go

@@ -8,7 +8,6 @@ package main
 
 import (
 	"crypto/sha256"
-	"encoding/base64"
 	"fmt"
 	"os"
 	"path"
@@ -153,21 +152,6 @@ func generateCSSBundle(bundleFile string, themes map[string][]string) {
 	bundle.Write(bundleFile)
 }
 
-func generateBinaryBundle(bundleFile string, srcFiles []string) {
-	bundle := NewBundle("static", "Binaries", "ui/static")
-
-	for _, srcFile := range srcFiles {
-		data := readFile(srcFile)
-		filename := basename(srcFile)
-		encodedData := base64.StdEncoding.EncodeToString(data)
-
-		bundle.Files[filename] = string(encodedData)
-		bundle.Checksums[filename] = checksum(data)
-	}
-
-	bundle.Write(bundleFile)
-}
-
 func generateBundle(bundleFile, pkg, mapName string, srcFiles []string) {
 	bundle := NewBundle(pkg, mapName, pkg)
 
@@ -212,8 +196,6 @@ func main() {
 		"system_sans_serif": []string{"ui/static/css/system.css", "ui/static/css/sans_serif.css", "ui/static/css/common.css"},
 	})
 
-	generateBinaryBundle("ui/static/bin.go", glob("ui/static/bin/*"))
-
 	generateBundle("template/views.go", "template", "templateViewsMap", glob("template/html/*.html"))
 	generateBundle("template/common.go", "template", "templateCommonMap", glob("template/html/common/*.html"))
 }

main.go

@@ -6,7 +6,6 @@ package main // import "miniflux.app"
 
 //go:generate go run generate.go
 //go:generate gofmt -s -w ui/static/css.go
-//go:generate gofmt -s -w ui/static/bin.go
 //go:generate gofmt -s -w ui/static/js.go
 //go:generate gofmt -s -w template/views.go
 //go:generate gofmt -s -w template/common.go

ui/static/static.go

@@ -0,0 +1,47 @@
+// Copyright 2021 Frédéric Guillot. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package static // import "miniflux.app/ui/static"
+
+import (
+	"crypto/sha256"
+	"embed"
+	"fmt"
+)
+
+//go:embed bin/*
+var binaryFiles embed.FS
+
+var binaryFileChecksums map[string]string
+
+func init() {
+	binaryFileChecksums = make(map[string]string)
+
+	dirEntries, err := binaryFiles.ReadDir("bin")
+	if err != nil {
+		panic(err)
+	}
+
+	for _, dirEntry := range dirEntries {
+		data, err := LoadBinaryFile(dirEntry.Name())
+		if err != nil {
+			panic(err)
+		}
+
+		binaryFileChecksums[dirEntry.Name()] = fmt.Sprintf("%x", sha256.Sum256(data))
+	}
+}
+
+// LoadBinaryFile loads an embed binary file.
+func LoadBinaryFile(filename string) ([]byte, error) {
+	return binaryFiles.ReadFile(fmt.Sprintf(`bin/%s`, filename))
+}
+
+// GetBinaryFileChecksum returns a binary file checksum.
+func GetBinaryFileChecksum(filename string) (string, error) {
+	if _, found := binaryFileChecksums[filename]; !found {
+		return "", fmt.Errorf(`static: unable to find checksum for %q`, filename)
+	}
+	return binaryFileChecksums[filename], nil
+}

ui/static_app_icon.go

@@ -5,7 +5,6 @@
 package ui // import "miniflux.app/ui"
 
 import (
-	"encoding/base64"
 	"net/http"
 	"time"
 
@@ -17,14 +16,14 @@ import (
 
 func (h *handler) showAppIcon(w http.ResponseWriter, r *http.Request) {
 	filename := request.RouteStringParam(r, "filename")
-	etag, found := static.BinariesChecksums[filename]
-	if !found {
+	etag, err := static.GetBinaryFileChecksum(filename)
+	if err != nil {
 		html.NotFound(w, r)
 		return
 	}
 
 	response.New(w, r).WithCaching(etag, 72*time.Hour, func(b *response.Builder) {
-		blob, err := base64.StdEncoding.DecodeString(static.Binaries[filename])
+		blob, err := static.LoadBinaryFile(filename)
 		if err != nil {
 			html.ServerError(w, r, err)
 			return

ui/static_favicon.go

@@ -5,7 +5,6 @@
 package ui // import "miniflux.app/ui"
 
 import (
-	"encoding/base64"
 	"net/http"
 	"time"
 
@@ -15,14 +14,14 @@ import (
 )
 
 func (h *handler) showFavicon(w http.ResponseWriter, r *http.Request) {
-	etag, found := static.BinariesChecksums["favicon.ico"]
-	if !found {
+	etag, err := static.GetBinaryFileChecksum("favicon.ico")
+	if err != nil {
 		html.NotFound(w, r)
 		return
 	}
 
 	response.New(w, r).WithCaching(etag, 48*time.Hour, func(b *response.Builder) {
-		blob, err := base64.StdEncoding.DecodeString(static.Binaries["favicon.ico"])
+		blob, err := static.LoadBinaryFile("favicon.ico")
 		if err != nil {
 			html.ServerError(w, r, err)
 			return