Refactor embedded assets and drop unnecessary dependencies (#34692)

Benefits:

1. smaller binary size (reduces more than 1MB)
2. better control of the assets details
3. fewer unmaintained dependencies
4. faster startup if the assets are not needed
5. won't hang up editors when open "bindata.go" by accident

build/generate-bindata.go

@@ -6,87 +6,22 @@
 package main
 
 import (
-	"bytes"
-	"crypto/sha1"
 	"fmt"
-	"log"
-	"net/http"
 	"os"
-	"path/filepath"
-	"strconv"
 
-	"github.com/shurcooL/vfsgen"
+	"code.gitea.io/gitea/modules/assetfs"
 )
 
-func needsUpdate(dir, filename string) (bool, []byte) {
-	needRegen := false
-	_, err := os.Stat(filename)
-	if err != nil {
-		needRegen = true
-	}
-
-	oldHash, err := os.ReadFile(filename + ".hash")
-	if err != nil {
-		oldHash = []byte{}
-	}
-
-	hasher := sha1.New()
-
-	err = filepath.WalkDir(dir, func(path string, d os.DirEntry, err error) error {
-		if err != nil {
-			return err
-		}
-		info, err := d.Info()
-		if err != nil {
-			return err
-		}
-		_, _ = hasher.Write([]byte(d.Name()))
-		_, _ = hasher.Write([]byte(info.ModTime().String()))
-		_, _ = hasher.Write([]byte(strconv.FormatInt(info.Size(), 16)))
-		return nil
-	})
-	if err != nil {
-		return true, oldHash
-	}
-
-	newHash := hasher.Sum([]byte{})
-
-	if bytes.Compare(oldHash, newHash) != 0 {
-		return true, newHash
-	}
-
-	return needRegen, newHash
-}
-
 func main() {
-	if len(os.Args) < 4 {
-		log.Fatal("Insufficient number of arguments. Need: directory packageName filename")
+	if len(os.Args) != 3 {
+		fmt.Println("usage: ./generate-bindata {local-directory} {bindata-filename}")
+		os.Exit(1)
 	}
 
-	dir, packageName, filename := os.Args[1], os.Args[2], os.Args[3]
-	var useGlobalModTime bool
-	if len(os.Args) == 5 {
-		useGlobalModTime, _ = strconv.ParseBool(os.Args[4])
+	dir, filename := os.Args[1], os.Args[2]
+	fmt.Printf("generating bindata for %s to %s\n", dir, filename)
+	if err := assetfs.GenerateEmbedBindata(dir, filename); err != nil {
+		fmt.Printf("failed: %s\n", err.Error())
+		os.Exit(1)
 	}
-
-	update, newHash := needsUpdate(dir, filename)
-
-	if !update {
-		fmt.Printf("bindata for %s already up-to-date\n", packageName)
-		return
-	}
-
-	fmt.Printf("generating bindata for %s\n", packageName)
-	var fsTemplates http.FileSystem = http.Dir(dir)
-	err := vfsgen.Generate(fsTemplates, vfsgen.Options{
-		PackageName:      packageName,
-		BuildTags:        "bindata",
-		VariableName:     "Assets",
-		Filename:         filename,
-		UseGlobalModTime: useGlobalModTime,
-	})
-	if err != nil {
-		log.Fatalf("%v\n", err)
-	}
-	_ = os.WriteFile(filename+".hash", newHash, 0o666)
 }