dirpath := NewSimpleTempDir("diffdir_")

defer os.RemoveAll(dirpath)

fa := SimpleTempFile(dirpath)

fmt.Fprintf(fa, "%s\n", a)

fa.Close()

fb := SimpleTempFile(dirpath)

fmt.Fprintf(fb, "%s\n", b)

fb.Close()

co, err := exec.Command("diff", "-b", fa.Name(), fb.Name()).CombinedOutput()

if err != nil {

// don't panic, diff returns 2 on differences

}

return co

dirpath, err := ioutil.TempDir(".", prefix)

if err != nil {

panic(err)

}

return dirpath

f, err := ioutil.TempFile(dirpath, "diff_file_")

if err != nil {

panic(err)

}

return f