mirror of
https://github.com/gohugoio/hugo.git
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f9978ed164
This commit pulls most of the image related logic into its own package, to make it easier to reason about and extend.
This is also a rewrite of the transformation logic used in Hugo Pipes, mostly to allow constructs like the one below:
{{ ($myimg | fingerprint ).Width }}
Fixes #5903
Fixes #6234
Fixes #6266
111 lines
3.2 KiB
Go
111 lines
3.2 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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package scss
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import (
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"github.com/bep/go-tocss/scss"
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"github.com/gohugoio/hugo/helpers"
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"github.com/gohugoio/hugo/hugolib/filesystems"
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"github.com/gohugoio/hugo/resources"
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"github.com/gohugoio/hugo/resources/internal"
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"github.com/gohugoio/hugo/resources/resource"
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"github.com/spf13/afero"
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"github.com/mitchellh/mapstructure"
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)
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type Client struct {
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rs *resources.Spec
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sfs *filesystems.SourceFilesystem
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workFs afero.Fs
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}
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func New(fs *filesystems.SourceFilesystem, rs *resources.Spec) (*Client, error) {
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return &Client{sfs: fs, workFs: rs.BaseFs.Work, rs: rs}, nil
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}
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type Options struct {
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// Hugo, will by default, just replace the extension of the source
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// to .css, e.g. "scss/main.scss" becomes "scss/main.css". You can
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// control this by setting this, e.g. "styles/main.css" will create
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// a Resource with that as a base for RelPermalink etc.
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TargetPath string
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// Hugo automatically adds the entry directories (where the main.scss lives)
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// for project and themes to the list of include paths sent to LibSASS.
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// Any paths set in this setting will be appended. Note that these will be
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// treated as relative to the working dir, i.e. no include paths outside the
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// project/themes.
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IncludePaths []string
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// Default is nested.
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// One of nested, expanded, compact, compressed.
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OutputStyle string
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// Precision of floating point math.
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Precision int
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// When enabled, Hugo will generate a source map.
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EnableSourceMap bool
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}
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type options struct {
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// The options we receive from the end user.
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from Options
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// The options we send to the SCSS library.
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to scss.Options
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}
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func (c *Client) ToCSS(res resources.ResourceTransformer, opts Options) (resource.Resource, error) {
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internalOptions := options{
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from: opts,
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}
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// Transfer values from client.
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internalOptions.to.Precision = opts.Precision
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internalOptions.to.OutputStyle = scss.OutputStyleFromString(opts.OutputStyle)
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if internalOptions.to.Precision == 0 {
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// bootstrap-sass requires 8 digits precision. The libsass default is 5.
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// https://github.com/twbs/bootstrap-sass/blob/master/README.md#sass-number-precision
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internalOptions.to.Precision = 8
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}
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return res.Transform(&toCSSTransformation{c: c, options: internalOptions})
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}
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type toCSSTransformation struct {
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c *Client
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options options
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}
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func (t *toCSSTransformation) Key() internal.ResourceTransformationKey {
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return internal.NewResourceTransformationKey("tocss", t.options.from)
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}
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func DecodeOptions(m map[string]interface{}) (opts Options, err error) {
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if m == nil {
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return
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}
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err = mapstructure.WeakDecode(m, &opts)
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if opts.TargetPath != "" {
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opts.TargetPath = helpers.ToSlashTrimLeading(opts.TargetPath)
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}
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return
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}
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