func main() {
flag.Usage = func() {
fmt.Fprint(os.Stderr, fmt.Sprintf(usage))
}
flag.Parse()
// Reader
var reader *bufio.Reader
if *input != "" {
file, err := os.Open(*input)
if err != nil {
usageAndExit(fmt.Sprintf("Error to open file input: %s.", *input))
}
defer file.Close()
reader = bufio.NewReader(file)
} else {
if stat, err := os.Stdin.Stat(); err == nil && stat.Size() > 0 {
reader = bufio.NewReader(os.Stdin)
} else {
usageAndExit("")
}
}
// Collect data
var data string
for {
line, err := reader.ReadString('\n')
if err != nil {
if err == io.EOF {
break
}
usageAndExit("Failed to reading input.")
}
data += line
}
// Writer
var file *os.File
var err error
if *output != "" {
file, err = os.Create(*output)
if err != nil {
usageAndExit("Error to create the wanted output file.")
}
} else {
file = os.Stdout
}
// Mark rendering
opts := mark.DefaultOptions()
opts.Smartypants = *smarty
opts.Fractions = *fractions
m := mark.New(data, opts)
if _, err := file.WriteString(m.Render()); err != nil {
filename := *output
if filename == "" {
filename = "STDOUT"
}
usageAndExit(fmt.Sprintf("Error writing output to: %s.", filename))
}
}
//HTML returns body text as html.
func (p *Page) HTML() template.HTML {
b, _ := ioutil.ReadAll(p.Body)
return template.HTML(mark.New(string(b), mark.DefaultOptions()).Render())
}