Improve flash performance, update Yarn.

.yarnrc.yml

@@ -1 +1 @@
-yarnPath: .yarn/releases/yarn-3.2.1.cjs
+yarnPath: .yarn/releases/yarn-3.2.4.cjs

flash.go

@@ -70,8 +70,8 @@ func FlashFileToBlockDevice(iff string, of string) {
 	fileStat, err := file.Stat()
 	if err != nil {
 		log.Fatalln("An error occurred while opening the file.", err)
-	} else if !fileStat.Mode().IsRegular() {
-		log.Fatalln("The specified file is not a regular file!")
+	} else if fileStat.Mode().IsDir() {
+		log.Fatalln("The specified source file is a folder!")
 	}
 	dest, err := os.OpenFile(destPath, os.O_WRONLY, os.ModePerm) // os.O_RDWR|os.O_EXCL|os.O_CREATE
 	if err != nil {
@@ -91,17 +91,17 @@ func FlashFileToBlockDevice(iff string, of string) {
 	timer := time.NewTimer(time.Second)
 	startTime := time.Now().UnixMilli()
 	var total int
+	buf := make([]byte, bs)
 	for {
-		data := make([]byte, bs)
-		n1, err := file.Read(data)
+		n1, err := file.Read(buf)
 		if err != nil {
 			if io.EOF == err {
 				break
 			} else {
 				log.Fatalln("Encountered error while reading file!", err)
 			}
 		}
-		n2, err := dest.Write(data[0:n1])
+		n2, err := dest.Write(buf[:n1])
 		if err != nil {
 			log.Fatalln("Encountered error while writing to dest!", err)
 		} else if n2 != n1 {
@@ -119,6 +119,7 @@ func FlashFileToBlockDevice(iff string, of string) {
 			timer.Reset(time.Second)
 		}
 	}
+	// t, _ := io.CopyBuffer(dest, file, buf); total = int(t)
 	err = dest.Sync()
 	if err != nil {
 		log.Fatalln("Failed to sync writes to disk!", err)

package.json

@@ -33,7 +33,7 @@
     "build:launcher": "go build -tags launcher -ldflags=\"-s -w\" -o launcher.exe -v launcher_windows.go",
     "build:js": "parcel build ui/index.tsx"
   },
-  "packageManager": "[email protected].1",
+  "packageManager": "[email protected].4",
   "dependencies": {
     "@emotion/react": "^11.10.0",
     "@emotion/styled": "^11.10.0",

yarn.lock

@@ -5610,7 +5610,7 @@ resolve@^2.0.0-next.3:
 
 "typescript@patch:typescript@^4.7.4#~builtin<compat/typescript>":
   version: 4.7.4
-  resolution: "typescript@patch:typescript@npm%3A4.7.4#~builtin<compat/typescript>::version=4.7.4&hash=7ad353"
+  resolution: "typescript@patch:typescript@npm%3A4.7.4#~builtin<compat/typescript>::version=4.7.4&hash=701156"
   bin:
     tsc: bin/tsc
     tsserver: bin/tsserver