fix: Windows users would hit EPERM error on importing configurations …

index.js

@@ -1,7 +1,6 @@
 #!/usr/bin/env electron
 
 const path = require('path')
-const fs = require('fs-extra')
 const minimist = require('minimist')
 const electron = require('electron')
 const isDev = require('electron-is-dev')
@@ -15,6 +14,7 @@ const rabbit = require('electron-rabbit')
 const app = electron.app
 const BrowserWindow = electron.BrowserWindow
 
+const userConfig = require('./src/main/user-config')
 const Worker = require('./src/worker')
 const logger = require('./src/logger')
 const electronIpc = require('./src/main/ipc')
@@ -187,19 +187,12 @@ function initDirectories (done) {
   mkdirp.sync(path.join(userDataPath, 'styles'))
   mkdirp.sync(path.join(userDataPath, 'presets'))
   mkdirp.sync(argv.datadir)
-  styles.unpackIfNew(userDataPath, function (err) {
+
+  styles.unpackIfNew(userDataPath, function (err, newSettings) {
     if (err) logger.error('[ERROR] while unpacking styles:', err)
-    var customLocation = path.join(userDataPath, 'presets', 'default')
-    fs.stat(path.join(customLocation, 'metadata.json'), function (err) {
-      if (err) {
-        if (err.code === 'ENOENT') {
-          var fallbackPresets = path.join(userDataPath, 'presets', styles.FALLBACK_DIR_NAME)
-          mkdirp.sync(fallbackPresets)
-          return fs.copy(fallbackPresets, customLocation, done)
-        } else logger.error(err)
-      }
-      done()
-    })
+    var fallbackSettingsLocation = path.join(userDataPath, 'presets', styles.FALLBACK_DIR_NAME)
+    if (newSettings) userConfig.copyFallbackSettings(fallbackSettingsLocation, done)
+    else done()
   })
 }
 

package.json

@@ -72,7 +72,7 @@
     "@fortawesome/fontawesome-svg-core": "^1.2.24",
     "@fortawesome/free-solid-svg-icons": "^5.11.1",
     "@fortawesome/react-fontawesome": "^0.1.4",
-    "@mapeo/settings": "^2.1.0",
+    "@mapeo/settings": "^2.1.1",
     "@material-ui/core": "^4.11.0",
     "@material-ui/icons": "^4.5.1",
     "@material-ui/lab": "^4.0.0-alpha.53",

src/background/server.js

@@ -9,7 +9,8 @@ module.exports = function (osm, media, { ipcSend, staticRoot }) {
   var mapeoRouter = createMapeoRouter(osm, media, {
     staticRoot: staticRoot,
     writeFormat: 'osm-p2p-syncfile',
-    deviceType: 'desktop'
+    deviceType: 'desktop',
+    fallbackPresetsDir: path.join(staticRoot, 'DEFAULT_SETTINGS', 'presets')
   })
 
   var staticHandler = ecstatic({

src/main/ipc.js

@@ -20,7 +20,7 @@ module.exports = function (win) {
 
   ipc.on('get-user-data', function (event, type) {
     var data = userConfig.getSettings(type)
-    if (!data) logger.debug('unhandled event', type)
+    if (!data) logger.debug('Could not get data for', type)
     event.returnValue = data
   })
 

src/main/user-config.js

@@ -1,8 +1,13 @@
 const app = require('electron').app
+const fs = require('fs-extra')
+const mkdirp = require('mkdirp')
 const Settings = require('@mapeo/settings')
+const path = require('path')
 
 const logger = require('../logger')
 
+const DEFAULT_SETTINGS = 'DEFAULT_SETTINGS'
+
 function importSettings (settingsFile, cb) {
   var userDataPath = app.getPath('userData')
   var settings = new Settings(userDataPath)
@@ -24,11 +29,45 @@ function getEncryptionKey () {
 
 function getSettings (type) {
   var userDataPath = app.getPath('userData')
-  return new Settings(userDataPath).getSettings(type)
+  var data = new Settings(userDataPath).getSettings(type)
+  if (!data) return getFallbackSettings(type)
+  else return data
+}
+
+function getFallbackSettings (type) {
+  var userDataPath = app.getPath('userData')
+  return new Settings(path.join(userDataPath, DEFAULT_SETTINGS)).getSettings(type)
+}
+
+function copyFallbackSettings (fallbackSettings, done) {
+  // location: the full pathname to the fallback default settings directory
+  // which is unzipped and includes presets.json, icons, etc
+  // e.g., /path/to/Users/miranda/Mapeo/presets/my-default-fallback-settings/
+
+  // XXX: mapeo-server's static router expects
+  //  - userDataPath/presets/default  ~or~
+  //  - fallbackPresetsDir/presets/default
+  // And we can't copy these styles directly into
+  // ... /userDataPath/presets/default, because Windows will throw
+  // an EPERM error if you try to copy over them when importing configurations
+
+  // This can be cleaned up once imported configurations exist in their own
+  // directories, and presets don't get overridden or copied over each other.
+  const userDataPath = app.getPath('userData')
+  const defaultSettings = path.join(userDataPath, DEFAULT_SETTINGS, 'presets')
+  mkdirp.sync(defaultSettings)
+  fs.copy(fallbackSettings, path.join(defaultSettings, 'default'),
+    (err) => {
+      if (err) logger.error('[ERROR] while unpacking default presets', err)
+      else logger.info('Unpacked new default styles and presets')
+      done()
+    }
+  )
 }
 
 module.exports = {
   importSettings,
   getSettings,
-  getEncryptionKey
+  getEncryptionKey,
+  copyFallbackSettings
 }