chore: update build scripts

build/generate-png.js

@@ -0,0 +1,36 @@
+const sharp = require('sharp')
+const fs = require('fs')
+const mkdirp = require('mkdirp');
+const dirnames = process.mainModule.filename.includes('pro') ?
+    ['solid', 'linear']
+  : ['free', 'brand', 'flag']
+const dest = 'png/'
+const sizes = [16, 32, 64, 128, 256]
+
+
+dirnames.forEach(setName => {
+  const dirname = `svg/${setName}/`
+  const svgs = fs.readdirSync(dirname)
+
+  sizes.forEach(size => {
+    mkdirp(`${dest}${setName}/${size}x${size}/`, function(err) {
+      if (err) {
+        return
+      } 
+  
+      svgs.forEach((svg) => {
+        const file = dirname + svg
+        sharp(file, { density: 72 * size / 16 })
+        .png()
+        .resize(size, size, {fit: 'inside'})
+        .toFile(`${dest}${setName}/${size}x${size}/${svg.replace('svg', 'png')}`)
+        .then(function(info) {
+          console.log(info)
+        })
+        .catch(function(err) {
+          console.log(err)
+        })
+      })
+    })
+  })
+})