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|
package main
import (
"bytes"
"crypto/rand"
"fmt"
"log"
"os"
"golang.org/x/net/context"
"github.com/wellington/go-libsass"
)
// cryptotext is of type libsass.SassFunc. As libsass compiles the
// source Sass, it will look for `crypto()` then call this function.
func cryptotext(ctx context.Context, usv libsass.SassValue) (*libsass.SassValue, error) {
c := 10
b := make([]byte, c)
_, err := rand.Read(b)
if err != nil {
return nil, err
}
res, err := libsass.Marshal(fmt.Sprintf("'%x'", b))
return &res, err
}
func main() {
// Register a custom Sass func crypto
libsass.RegisterSassFunc("crypto()", cryptotext)
// Input Sass source
input := `div { text: crypto(); }`
buf := bytes.NewBufferString(input)
// Starts a compiler writing to Stdout and reading from
// a bytes buffer of the input source
comp, err := libsass.New(os.Stdout, buf)
if err != nil {
log.Fatal(err)
}
// Run() kicks off the compiler and instructs libsass how
// to read our input, handling the output from libsass
if err := comp.Run(); err != nil {
log.Fatal(err)
}
// Output:
// div {
// text: 'c91db27d5e580ef4292e'; }
}
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