hugo minifiers 代码
文件路径：/minifiers/minifiers.go
/ 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 minifiers contains minifiers mapped to MIME types. This package is used
/ in both the resource transformation, i.e. resources.Minify, and in the publishing
/ chain.
package minifiers
import (
"io"
"regexp"
"github.com/gohugoio/hugo/config"
"github.com/gohugoio/hugo/output"
"github.com/gohugoio/hugo/transform"
"github.com/gohugoio/hugo/media"
"github.com/tdewolff/minify/v2"
)
/ Client wraps a minifier.
type Client struct {
/ Whether output minification is enabled (HTML in /public)
MinifyOutput bool
m *minify.M
}
/ Transformer returns a func that can be used in the transformer publishing chain.
/ TODO(bep) minify config etc
func (m Client) Transformer(mediatype media.Type) transform.Transformer {
_, params, min := m.m.Match(mediatype.Type())
if min == nil {
/ No minifier for this MIME type
return nil
}
return func(ft transform.FromTo) error {
/ Note that the source io.Reader will already be buffered, but it implements
/ the Bytes() method, which is recognized by the Minify library.
return min.Minify(m.m, ft.To(), ft.From(), params)
}
}
/ Minify tries to minify the src into dst given a MIME type.
func (m Client) Minify(mediatype media.Type, dst io.Writer, src io.Reader) error {
return m.m.Minify(mediatype.Type(), dst, src)
}
/ noopMinifier implements minify.Minifier [1], but doesn't minify content. This means
/ that we can avoid missing minifiers for any MIME types in our minify.M, which
/ causes minify to return errors, while still allowing minification to be
/ disabled for specific types.
/
/ [1]: https://pkg.go.dev/github.com/tdewolff/minify#Minifier
type noopMinifier struct{}
/ Minify copies r into w without transformation.
func (m noopMinifier) Minify(_ *minify.M, w io.Writer, r io.Reader, _ map[string]string) error {
_, err := io.Copy(w, r)
return err
}
/ New creates a new Client with the provided MIME types as the mapping foundation.
/ The HTML minifier is also registered for additional HTML types (AMP etc.) in the
/ provided list of output formats.
func New(mediaTypes media.Types, outputFormats output.Formats, cfg config.Provider) (Client, error) {
conf, err := decodeConfig(cfg)
m := minify.New()
if err != nil {
return Client{}, err
}
/ We use the Type definition of the media types defined in the site if found.
addMinifier(m, mediaTypes, "css", getMinifier(conf, "css"))
addMinifier(m, mediaTypes, "js", getMinifier(conf, "js"))
m.AddRegexp(regexp.MustCompile("^(application|text)/(x-)?(java|ecma)script$"), getMinifier(conf, "js"))
addMinifier(m, mediaTypes, "json", getMinifier(conf, "json"))
m.AddRegexp(regexp.MustCompile(`^(application|text)/(x-|(ld|manifest)\+)?json$`), getMinifier(conf, "json"))
addMinifier(m, mediaTypes, "svg", getMinifier(conf, "svg"))
addMinifier(m, mediaTypes, "xml", getMinifier(conf, "xml"))
/ HTML
addMinifier(m, mediaTypes, "html", getMinifier(conf, "html"))
for _, of := range outputFormats {
if of.IsHTML {
m.Add(of.MediaType.Type(), getMinifier(conf, "html"))
}
}
return Client{m: m, MinifyOutput: conf.MinifyOutput}, nil
}
/ getMinifier returns the appropriate minify.MinifierFunc for the MIME
/ type suffix s, given the config c.
func getMinifier(c minifyConfig, s string) minify.Minifier {
switch {
case s == "css" && !c.DisableCSS:
return &c.Tdewolff.CSS
case s == "js" && !c.DisableJS:
return &c.Tdewolff.JS
case s == "json" && !c.DisableJSON:
return &c.Tdewolff.JSON
case s == "svg" && !c.DisableSVG:
return &c.Tdewolff.SVG
case s == "xml" && !c.DisableXML:
return &c.Tdewolff.XML
case s == "html" && !c.DisableHTML:
return &c.Tdewolff.HTML
default:
return noopMinifier{}
}
}
func addMinifier(m *minify.M, mt media.Types, suffix string, min minify.Minifier) {
types := mt.BySuffix(suffix)
for _, t := range types {
m.Add(t.Type(), min)
}
}