mirror of
https://github.com/gohugoio/hugo.git
synced 2024-07-07 17:46:05 +00:00
120 lines
3.5 KiB
Go
120 lines
3.5 KiB
Go
// Copyright 2018 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// +build extended
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package scss
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import (
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"fmt"
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"io"
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"path"
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"path/filepath"
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"strings"
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"github.com/bep/go-tocss/scss"
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"github.com/bep/go-tocss/scss/libsass"
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"github.com/bep/go-tocss/tocss"
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"github.com/gohugoio/hugo/helpers"
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"github.com/gohugoio/hugo/media"
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"github.com/gohugoio/hugo/resource"
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)
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// Used in tests. This feature requires Hugo to be built with the extended tag.
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func Supports() bool {
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return true
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}
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func (t *toCSSTransformation) Transform(ctx *resource.ResourceTransformationCtx) error {
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ctx.OutMediaType = media.CSSType
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var outName string
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if t.options.from.TargetPath != "" {
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ctx.OutPath = t.options.from.TargetPath
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} else {
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ctx.ReplaceOutPathExtension(".css")
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}
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outName = path.Base(ctx.OutPath)
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options := t.options
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options.to.IncludePaths = t.c.sfs.RealDirs(path.Dir(ctx.SourcePath))
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// Append any workDir relative include paths
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for _, ip := range options.from.IncludePaths {
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options.to.IncludePaths = append(options.to.IncludePaths, t.c.workFs.RealDirs(filepath.Clean(ip))...)
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}
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if ctx.InMediaType.SubType == media.SASSType.SubType {
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options.to.SassSyntax = true
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}
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if options.from.EnableSourceMap {
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options.to.SourceMapFilename = outName + ".map"
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options.to.SourceMapRoot = t.c.rs.WorkingDir
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// Setting this to the relative input filename will get the source map
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// more correct for the main entry path (main.scss typically), but
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// it will mess up the import mappings. As a workaround, we do a replacement
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// in the source map itself (see below).
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//options.InputPath = inputPath
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options.to.OutputPath = outName
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options.to.SourceMapContents = true
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options.to.OmitSourceMapURL = false
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options.to.EnableEmbeddedSourceMap = false
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}
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res, err := t.c.toCSS(options.to, ctx.To, ctx.From)
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if err != nil {
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return err
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}
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if options.from.EnableSourceMap && res.SourceMapContent != "" {
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sourcePath := t.c.sfs.RealFilename(ctx.SourcePath)
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if strings.HasPrefix(sourcePath, t.c.rs.WorkingDir) {
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sourcePath = strings.TrimPrefix(sourcePath, t.c.rs.WorkingDir+helpers.FilePathSeparator)
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}
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// This needs to be Unix-style slashes, even on Windows.
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// See https://github.com/gohugoio/hugo/issues/4968
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sourcePath = filepath.ToSlash(sourcePath)
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// This is a workaround for what looks like a bug in Libsass. But
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// getting this resolution correct in tools like Chrome Workspaces
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// is important enough to go this extra mile.
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mapContent := strings.Replace(res.SourceMapContent, `stdin",`, fmt.Sprintf("%s\",", sourcePath), 1)
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return ctx.PublishSourceMap(mapContent)
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}
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return nil
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}
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func (c *Client) toCSS(options scss.Options, dst io.Writer, src io.Reader) (tocss.Result, error) {
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var res tocss.Result
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transpiler, err := libsass.New(options)
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if err != nil {
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return res, err
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}
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res, err = transpiler.Execute(dst, src)
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if err != nil {
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return res, fmt.Errorf("SCSS processing failed: %s", err)
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}
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return res, nil
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}
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