cmdyutil

func IsStdinOrFileError ¶

func IsStdinOrFileError(err error) bool

func OpenStdinOrFile ¶

func OpenStdinOrFile(ctx cmdy.Context, fileName string) (rdr io.ReadCloser, err error)

OpenStdinOrFile will check if the program's input is a pipe. If so, it will return stdin, otherwise it will return an open file.

The returned ReadCloser must always be closed.

func ReadStdinOrFile ¶

func ReadStdinOrFile(ctx cmdy.Context, fileName string) (bts []byte, err error)

ReadStdinOrFile will check if the program's input is a pipe. If so, it will read from stdin, otherwise it will read from fileName.