Use embed package for binary assets instead of generated files

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
+}