mirror of
https://github.com/danog/gojekyll.git
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89 lines
2.0 KiB
Go
89 lines
2.0 KiB
Go
package pipelines
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import (
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"bytes"
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"crypto/md5" // nolint: gas
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"path/filepath"
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"strings"
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"github.com/dchest/cssmin"
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"github.com/osteele/gojekyll/cache"
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"github.com/osteele/gojekyll/utils"
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libsass "github.com/wellington/go-libsass"
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)
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// CopySassFileIncludes copies sass partials into a temporary directory,
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// removing initial underscores.
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// TODO delete the temp directory when done
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func (p *Pipeline) CopySassFileIncludes() error {
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// TODO use libsass.ImportsOption instead?
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if p.sassTempDir == "" {
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dir, err := ioutil.TempDir(os.TempDir(), "_sass")
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if err != nil {
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return err
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}
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p.sassTempDir = dir
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}
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h := md5.New() // nolint: gas, noncrypto
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src := filepath.Join(p.SourceDir(), "_sass")
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dst := p.sassTempDir
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err := filepath.Walk(src, func(from string, info os.FileInfo, err error) error {
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if err != nil || info.IsDir() {
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return err
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}
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rel := utils.MustRel(src, from)
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to := filepath.Join(dst, strings.TrimPrefix(rel, "_"))
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in, err := os.Open(from)
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if err != nil {
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return err
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}
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defer in.Close() // nolint: errcheck
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_, err = io.Copy(h, in)
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if err != nil {
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return err
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}
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return utils.CopyFileContents(to, from, 0644)
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})
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if os.IsNotExist(err) {
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return nil
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}
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p.sassHash = fmt.Sprintf("%x", h.Sum(nil))
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return err
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}
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// SassIncludePaths returns an array of sass include directories.
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func (p *Pipeline) SassIncludePaths() []string {
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return []string{p.sassTempDir}
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}
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// WriteSass converts a SASS file and writes it to w.
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func (p *Pipeline) WriteSass(w io.Writer, b []byte) error {
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s, err := cache.WithFile(fmt.Sprintf("sass: %s", p.sassHash), string(b), func() (s string, err error) {
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buf := new(bytes.Buffer)
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comp, err := libsass.New(buf, bytes.NewBuffer(b))
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if err != nil {
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return "", err
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}
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err = comp.Option(libsass.IncludePaths(p.SassIncludePaths()))
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if err != nil {
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return "", err
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}
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if err = comp.Run(); err != nil {
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return "", err
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}
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b = cssmin.Minify(buf.Bytes())
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return string(b), nil
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})
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if err != nil {
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return err
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}
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_, err = w.Write([]byte(s))
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return err
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}
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