embed

Documentation

Index

• func ExtractFile(fs *embed.FS, srcPath, dstPath string) error
• func PromiseExtractFile(fs *embed.FS, srcPath, dstPath string, successFunc func(dst string) error, ...) (err error)

Examples

• ExtractFile
• PromiseExtractFile

Functions

func ExtractFile

func ExtractFile(fs *embed.FS, srcPath, dstPath string) error

Example

Extract the file from the embed path (src) to the output path (dst).

outputFilePath := "./output.txt"
if err := ExtractFile(&embedBuildBat, "testData/hello.txt", outputFilePath); err != nil {
	panic(err)
}
if _, err := os.Stat(outputFilePath); os.IsNotExist(err) {
	panic(err)
}
defer func() {
	if err := os.Remove(outputFilePath); err != nil {
		panic(err)
	}
}()
f, _ := os.Open(outputFilePath)
defer f.Close()
dataBytes, _ := io.ReadAll(f)
fmt.Println(string(dataBytes))

Output:

Hello World!

func PromiseExtractFile

func PromiseExtractFile(fs *embed.FS, srcPath, dstPath string,
	successFunc func(dst string) error,
	errFunc func(err error) error,
) (err error)

PromiseExtractFile 與ExtractFile類似，但可以在成功或者失敗的時候在做某些事情

Example

outputFilePath := "./output.txt"
if err := PromiseExtractFile(&embedBuildBat, "testData/hello.txt", outputFilePath,
	func(dst string) error {
		f, _ := os.Open(dst)
		dataBytes, _ := io.ReadAll(f)
		_ = f.Close()
		fmt.Println(string(dataBytes))
		return os.Remove(outputFilePath)
	}, nil); err != nil {
	panic(err)
}

if err := PromiseExtractFile(&embedBuildBat, "not_exist_file.txt", outputFilePath,
	nil, func(err error) error {
		fmt.Println("got an error")
		return err
	}); err == nil {
	panic(err)
}

Output:

Hello World!
got an error