// Compile reads in and writes the libsass compiled result to out.
// Options and custom functions are applied as specified in Context.
func (ctx *Context) Compile(in io.Reader, out io.Writer) error {
defer ctx.Reset()
bs, err := ioutil.ReadAll(in)
if err != nil {
return err
}
if len(bs) == 0 {
return errors.New("No input provided")
}
src := C.CString(string(bs))
dc := C.sass_make_data_context(src)
defer C.sass_delete_data_context(dc)
options := C.sass_data_context_get_options(dc)
opts := ctx.Init((*SassOptions)(options))
// TODO: Manually free options memory without throwing
// malloc errors
// defer C.free(unsafe.Pointer(opts))
C.sass_data_context_set_options(dc, opts)
cc := C.sass_data_context_get_context(dc)
compiler := C.sass_make_data_compiler(dc)
C.sass_compiler_parse(compiler)
C.sass_compiler_execute(compiler)
defer C.sass_delete_compiler(compiler)
cout := C.GoString(C.sass_context_get_output_string(cc))
io.WriteString(out, cout)
ctx.Status = int(C.sass_context_get_error_status(cc))
errJSON := C.sass_context_get_error_json(cc)
err = ctx.ProcessSassError([]byte(C.GoString(errJSON)))
if err != nil {
return err
}
if ctx.error() != "" {
lines := bytes.Split(bs, []byte("\n"))
var out string
for i := -7; i < 7; i++ {
if i+ctx.Errors.Line >= 0 && i+ctx.Errors.Line < len(lines) {
out += fmt.Sprintf("%s\n", string(lines[i+ctx.Errors.Line]))
}
}
// TODO: this is weird, make something more idiomatic
return errors.New(ctx.error() + "\n" + out)
}
return nil
}
// SassDataContextGetContext returns a context from a data context.
// These are useful for calling generic methods like compiling.
func SassDataContextGetContext(godc SassDataContext) SassContext {
opts := C.sass_data_context_get_context(godc)
return (SassContext)(opts)
}
func (dc *datacontext) Context() Context {
cc := (*C.struct_Sass_Data_Context)(dc)
return (*context)(C.sass_data_context_get_context(cc))
}