// Init validates options in the struct and returns a Sass Options.
func (ctx *compctx) Init(goopts libs.SassOptions) libs.SassOptions {
if ctx.Precision == 0 {
ctx.Precision = 5
}
ctx.options = goopts
ctx.Headers.Bind(goopts)
ctx.Imports.Bind(goopts)
ctx.Funcs.Bind(goopts)
libs.SassOptionSetSourceComments(goopts, ctx.compiler.LineComments())
libs.SetIncludePaths(goopts, ctx.IncludePaths)
libs.SassOptionSetPrecision(goopts, ctx.Precision)
libs.SassOptionSetOutputStyle(goopts, ctx.OutputStyle)
libs.SassOptionSetSourceComments(goopts, ctx.Comments)
return goopts
}
// Compile reads in and writes the libsass compiled result to out.
// Options and custom functions are applied as specified in Context.
func (ctx *compctx) 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")
}
godc := libs.SassMakeDataContext(string(bs))
goopts := libs.SassDataContextGetOptions(godc)
libs.SassOptionSetSourceComments(goopts, true)
ctx.Init(goopts)
libs.SassDataContextSetOptions(godc, goopts)
goctx := libs.SassDataContextGetContext(godc)
ctx.context = goctx
gocompiler := libs.SassMakeDataCompiler(godc)
libs.SassCompilerParse(gocompiler)
libs.SassCompilerExecute(gocompiler)
if ctx.includeMap {
libs.SassOptionSetSourceMapEmbed(goopts, true)
}
defer libs.SassDeleteCompiler(gocompiler)
goout := libs.SassContextGetOutputString(goctx)
io.WriteString(out, goout)
ctx.Status = libs.SassContextGetErrorStatus(goctx)
errJSON := libs.SassContextGetErrorJSON(goctx)
err = ctx.ProcessSassError([]byte(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.err.Line >= 0 && i+ctx.err.Line < len(lines) {
out += fmt.Sprintf("%s\n", string(lines[i+ctx.err.Line]))
}
}
// TODO: this is weird, make something more idiomatic
return errors.New(ctx.Error() + "\n" + out)
}
return nil
}