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// Copyright 2018 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package scss
import (
"regexp"
"github.com/gohugoio/hugo/helpers"
"github.com/gohugoio/hugo/hugolib/filesystems"
"github.com/gohugoio/hugo/resources"
"github.com/spf13/afero"
"github.com/mitchellh/mapstructure"
)
const transformationName = "tocss"
type Client struct {
rs *resources.Spec
sfs *filesystems.SourceFilesystem
workFs afero.Fs
}
func New(fs *filesystems.SourceFilesystem, rs *resources.Spec) (*Client, error) {
return &Client{sfs: fs, workFs: rs.BaseFs.Work, rs: rs}, nil
}
type Options struct {
// Hugo, will by default, just replace the extension of the source
// to .css, e.g. "scss/main.scss" becomes "scss/main.css". You can
// control this by setting this, e.g. "styles/main.css" will create
// a Resource with that as a base for RelPermalink etc.
TargetPath string
// Hugo automatically adds the entry directories (where the main.scss lives)
// for project and themes to the list of include paths sent to LibSASS.
// Any paths set in this setting will be appended. Note that these will be
// treated as relative to the working dir, i.e. no include paths outside the
// project/themes.
IncludePaths []string
// Default is nested.
// One of nested, expanded, compact, compressed.
OutputStyle string
// Precision of floating point math.
Precision int
// When enabled, Hugo will generate a source map.
EnableSourceMap bool
// Vars will be available in 'hugo:vars', e.g:
// @import "hugo:vars";
Vars map[string]string
}
func DecodeOptions(m map[string]any) (opts Options, err error) {
if m == nil {
return
}
err = mapstructure.WeakDecode(m, &opts)
if opts.TargetPath != "" {
opts.TargetPath = helpers.ToSlashTrimLeading(opts.TargetPath)
}
return
}
var (
regularCSSImportTo = regexp.MustCompile(`.*(@import "(.*\.css)";).*`)
regularCSSImportFrom = regexp.MustCompile(`.*(\/\* HUGO_IMPORT_START (.*) HUGO_IMPORT_END \*\/).*`)
)
func replaceRegularImportsIn(s string) (string, bool) {
replaced := regularCSSImportTo.ReplaceAllString(s, "/* HUGO_IMPORT_START $2 HUGO_IMPORT_END */")
return replaced, s != replaced
}
func replaceRegularImportsOut(s string) string {
return regularCSSImportFrom.ReplaceAllString(s, "@import \"$2\";")
}
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