Put this file into the _extensions folder of your pretzel project togehter with the libsassnet dependencies.
Compile it with (modify the path to pretzel.exe):
fsc --target:library --reference:../pretzel.exe --reference:LibSass.x86.dll --reference:libsassnet.dll .\Pretzel.SassTransformer.fsx
| #r "System.ComponentModel.Composition" | |
| #if INTERACTIVE | |
| #r "../Pretzel.exe" | |
| #r "LibSass.x86.dll" | |
| #r "libsassnet.dll" | |
| #endif | |
| open System.ComponentModel.Composition | |
| open Pretzel.Logic.Extensibility | |
| open Pretzel.Logic.Templating.Context | |
| open System.IO.Abstractions | |
| open LibSassNet | |
| open Pretzel.Logic.Commands | |
| type [<Export(typeof<ITransform>)>] SassTranformer | |
| [<ImportingConstructor>] (fileSystem: IFileSystem, commandParameters: CommandParameters) = | |
| let processSass paths path = | |
| let sassCompiler = SassCompiler() | |
| let result = sassCompiler.CompileFile(inputPath = path, | |
| outputStyle = OutputStyle.Compressed, | |
| sourceComments = SourceCommentsMode.None, | |
| additionalIncludePaths = paths) | |
| result.CSS | |
| let transformPage (page: Page) = do | |
| if fileSystem.File.Exists page.Filepath then | |
| let cssFilePath = fileSystem.Path.ChangeExtension(page.OutputFile, ".css") | |
| let paths = [| fileSystem.Path.Combine(commandParameters.Path, "_sass") |] | |
| do fileSystem.File.WriteAllText(cssFilePath, processSass paths page.Filepath) | |
| do fileSystem.File.Delete(page.OutputFile) | |
| let transform (siteContext: SiteContext) = do | |
| siteContext.Pages | |
| |> Seq.filter (fun p -> | |
| let ext = fileSystem.Path.GetExtension(p.File) | |
| ext = ".sass" || ext = ".scss") | |
| |> Seq.iter transformPage | |
| interface ITransform with | |
| member __.Transform(siteContext) = | |
| transform siteContext |