Perform theme copy natively without recursive-copy (#901)

There's some sort of issue with recursive-copy's interaction with Electron's ASAR-patched fs module.

package.json

@@ -106,7 +106,6 @@
     "pikaday": "^1.8.0",
     "preact": "^10.4.0",
     "react-markdown": "^8.0.3",
-    "recursive-copy": "^2.0.10",
     "remark-breaks": "^3.0.2",
     "rimraf": "^3.0.2",
     "uuid": "^7.0.3",

src/components/drawers/PreferencesDrawer.js

@@ -4,15 +4,18 @@ import * as remote from '@electron/remote'
 import {h, Component} from 'preact'
 import classNames from 'classnames'
 import {join} from 'path'
-import copy from 'recursive-copy'
 import rimraf from 'rimraf'
 import {v4 as uuid} from 'uuid'
 import natsort from 'natsort'
 
 import i18n from '../../i18n.js'
 import sabaki from '../../modules/sabaki.js'
 import {showOpenDialog, showMessageBox} from '../../modules/dialog.js'
-import {noop, isWritableDirectory} from '../../modules/helper.js'
+import {
+  copyFolderSync,
+  noop,
+  isWritableDirectory
+} from '../../modules/helper.js'
 import * as gtplogger from '../../modules/gtplogger.js'
 import Drawer from './Drawer.js'
 
@@ -449,12 +452,14 @@ class ThemesTab extends Component {
 
       let id = uuid()
 
-      copy(result[0], join(setting.themesDirectory, id), err => {
-        if (err) return showMessageBox(t('Installation failed.'), 'error')
+      try {
+        copyFolderSync(result[0], join(setting.themesDirectory, id))
 
         setting.loadThemes()
         setting.set('theme.current', id)
-      })
+      } catch (err) {
+        return showMessageBox(t('Installation failed.'), 'error')
+      }
     }
 
     setting.events.on(sabaki.window.id, 'change', ({key, value}) => {

src/modules/helper.js

@@ -1,4 +1,5 @@
 import fs from 'fs'
+import {join} from 'path'
 
 let id = 0
 
@@ -142,6 +143,17 @@ export function isWritableDirectory(path) {
   }
 }
 
+export function copyFolderSync(from, to) {
+  fs.mkdirSync(to)
+  fs.readdirSync(from).forEach(element => {
+    if (fs.lstatSync(join(from, element)).isFile()) {
+      fs.copyFileSync(join(from, element), join(to, element))
+    } else {
+      copyFolderSync(join(from, element), join(to, element))
+    }
+  })
+}
+
 export function getScore(board, areaMap, {komi = 0, handicap = 0} = {}) {
   let score = {
     area: [0, 0],