feat: minify svg using svgo

README.md

@@ -78,6 +78,24 @@ For more options, see [Terser](https://github.com/terser-js/terser).
 
 ----------
 
+``` yaml
+neat_svg:
+  enable: true
+  include:
+    - '*.svg'
+    - '!*.min.svg'
+```
+- **enable** - Enable the plugin. Defaults to `true`.
+- **logger** - Verbose output. Defaults to `false`.
+- **include** - Include files. Support wildcard pattern.
+  - Exclude `*.min.svg` by default.
+- **plugin** - Plugin options.
+  - To retain comments, `plugins: [{removeComments: false}]`.
+
+For more options, see [svgo](https://github.com/svg/svgo).
+
+----------
+
 ``` yaml
 neat_gzip:
   enable: true

index.js

@@ -33,6 +33,14 @@ if (hexo.config.neat_enable === true) {
     compress: {}
   }, hexo.config.neat_js)
 
+  // SVG minifier
+  hexo.config.neat_svg = Object.assign({
+    enable: true,
+    logger: false,
+    include: ['*.svg','!*.min.svg'],
+    plugin: []
+  }, hexo.config.neat_svg)
+
   // gzip compression
   hexo.config.neat_gzip = Object.assign({
     enable: true,
@@ -51,6 +59,7 @@ if (hexo.config.neat_enable === true) {
   hexo.extend.filter.register('after_render:html', filter.logicHtml)
   hexo.extend.filter.register('after_render:css', filter.logicCss)
   hexo.extend.filter.register('after_render:js', filter.logicJs)
+  hexo.extend.filter.register('after_generate', filter.logicSvg)
   hexo.extend.filter.register('after_generate', filter.logicGzip)
   hexo.extend.filter.register('after_generate', filter.logicBrotli)
 }

lib/filter.js

@@ -6,6 +6,7 @@ const Htmlminifier = require('html-minifier').minify
 const nanomatch = require('nanomatch')
 const zlib = require('zlib')
 const br = require('iltorb')
+const svgo = require('svgo')
 
 function logicHtml (str, data) {
   const hexo = this
@@ -86,6 +87,43 @@ function logicJs (str, data) {
   return result.code
 }
 
+function logicSvg () {
+  const hexo = this
+  const options = hexo.config.neat_svg
+  // Return if disabled.
+  if (options.enable === false) return
+
+  let route = hexo.route
+  let routeList = route.list()
+  let include = options.include
+
+  return Promise.all((nanomatch(routeList, include, { matchBase: true })).map(path => {
+    return new Promise((resolve, reject) => {
+      // Grab all assets using hexo router
+      let assetPath = route.get(path)
+      let assetTxt = ''
+      // Extract the content
+      assetPath.on('data', (chunk) => (assetTxt += chunk))
+      assetPath.on('end', () => {
+        if (assetTxt.length) {
+          // gzip compress using highest level
+          new svgo(options).optimize(assetTxt).then(function(result) {
+              // Save the compressed file to .gz
+              route.set(path, result.data)
+              // Logging
+              let saved = ((assetTxt.length - result.data.length) / assetTxt.length * 100).toFixed(2)
+              if (options.logger) {
+                let log = hexo.log || console.log
+                log.log('Minify the svg: %s [%s saved]', path, saved + '%')
+              }
+              resolve(assetTxt)
+          })
+        }
+      })
+    })
+  }))
+}
+
 function logicGzip () {
   const hexo = this
   const options = hexo.config.neat_gzip
@@ -174,6 +212,7 @@ module.exports = {
   logicHtml: logicHtml,
   logicCss: logicCss,
   logicJs: logicJs,
+  logicSvg: logicSvg,
   logicGzip: logicGzip,
   logicBrotli: logicBrotli
 }

package.json

@@ -22,12 +22,14 @@
     "html-minifier": "^4.0.0",
     "iltorb": "^2.4.2",
     "nanomatch": "^1.2.13",
+    "svgo": "^1.2.2",
     "terser": "^3.17.0"
   },
   "keywords": [
     "html",
     "js",
     "css",
+    "svg",
     "minify",
     "compress",
     "gzip",