diff options
Diffstat (limited to 'resources/resource_transformers/tocss/dartsass/client.go')
-rw-r--r-- | resources/resource_transformers/tocss/dartsass/client.go | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/resources/resource_transformers/tocss/dartsass/client.go b/resources/resource_transformers/tocss/dartsass/client.go new file mode 100644 index 000000000..1d8250dc5 --- /dev/null +++ b/resources/resource_transformers/tocss/dartsass/client.go @@ -0,0 +1,115 @@ +// Copyright 2020 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 godartsass integrates with the Dass Sass Embedded protocol to transpile +// SCSS/SASS. +package dartsass + +import ( + "io" + + "github.com/gohugoio/hugo/helpers" + "github.com/gohugoio/hugo/hugolib/filesystems" + "github.com/gohugoio/hugo/resources" + "github.com/gohugoio/hugo/resources/resource" + "github.com/spf13/afero" + + "github.com/bep/godartsass" + "github.com/mitchellh/mapstructure" +) + +// used as part of the cache key. +const transformationName = "tocss-dart" + +func New(fs *filesystems.SourceFilesystem, rs *resources.Spec) (*Client, error) { + if !Supports() { + return &Client{dartSassNoAvailable: true}, nil + } + transpiler, err := godartsass.Start(godartsass.Options{}) + if err != nil { + return nil, err + } + return &Client{sfs: fs, workFs: rs.BaseFs.Work, rs: rs, transpiler: transpiler}, nil +} + +type Client struct { + dartSassNoAvailable bool + rs *resources.Spec + sfs *filesystems.SourceFilesystem + workFs afero.Fs + transpiler *godartsass.Transpiler +} + +func (c *Client) ToCSS(res resources.ResourceTransformer, args map[string]interface{}) (resource.Resource, error) { + if c.dartSassNoAvailable { + return res.Transform(resources.NewFeatureNotAvailableTransformer(transformationName, args)) + } + return res.Transform(&transform{c: c, optsm: args}) +} + +func (c *Client) Close() error { + if c.transpiler == nil { + return nil + } + return c.transpiler.Close() +} + +func (c *Client) toCSS(args godartsass.Args, src io.Reader) (godartsass.Result, error) { + var res godartsass.Result + + in := helpers.ReaderToString(src) + args.Source = in + + res, err := c.transpiler.Execute(args) + if err != nil { + return res, err + } + + return res, err +} + +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 + + // When enabled, Hugo will generate a source map. + EnableSourceMap bool +} + +func decodeOptions(m map[string]interface{}) (opts Options, err error) { + if m == nil { + return + } + err = mapstructure.WeakDecode(m, &opts) + + if opts.TargetPath != "" { + opts.TargetPath = helpers.ToSlashTrimLeading(opts.TargetPath) + } + + return +} |