From ea55a2edc33550d2ec0b2366dec4c55ce391f6a4 Mon Sep 17 00:00:00 2001
From: Federico Fissore <f.fissore@arduino.cc>
Date: Tue, 23 Jun 2015 15:58:11 +0200
Subject: [PATCH] Windows: migrating from AppData\Roaming\Arduino15 to
 AppData\Local\Arduino15. Migration occurs when NO preferences file location
 is provided (CLI only), when new location does not exist and when there is
 something to migrate. Fixes #2902

---
 .../src/processing/app/BaseNoGui.java         |  2 +-
 arduino-core/src/processing/app/Platform.java |  4 ++++
 .../src/processing/app/PreferencesData.java   |  5 +++-
 .../src/processing/app/windows/Platform.java  | 24 ++++++++++++++++++-
 4 files changed, 32 insertions(+), 3 deletions(-)

diff --git a/arduino-core/src/processing/app/BaseNoGui.java b/arduino-core/src/processing/app/BaseNoGui.java
index b39b306cd..8aeffcc15 100644
--- a/arduino-core/src/processing/app/BaseNoGui.java
+++ b/arduino-core/src/processing/app/BaseNoGui.java
@@ -962,7 +962,7 @@ public class BaseNoGui {
     }
   }
 
-  static public void initParameters(String args[]) {
+  static public void initParameters(String args[]) throws IOException {
     String preferencesFile = null;
 
     // Do a first pass over the commandline arguments, the rest of them
diff --git a/arduino-core/src/processing/app/Platform.java b/arduino-core/src/processing/app/Platform.java
index 1d39b27eb..dee2df451 100644
--- a/arduino-core/src/processing/app/Platform.java
+++ b/arduino-core/src/processing/app/Platform.java
@@ -245,4 +245,8 @@ public class Platform {
     Process process = Runtime.getRuntime().exec(new String[]{"chmod", Integer.toOctalString(mode), file.getAbsolutePath()}, null, null);
     process.waitFor();
   }
+
+  public void fixSettingsLocation() throws IOException {
+    //noop
+  }
 }
diff --git a/arduino-core/src/processing/app/PreferencesData.java b/arduino-core/src/processing/app/PreferencesData.java
index a273221a3..8e49c2f1b 100644
--- a/arduino-core/src/processing/app/PreferencesData.java
+++ b/arduino-core/src/processing/app/PreferencesData.java
@@ -31,7 +31,10 @@ public class PreferencesData {
   static boolean doSave = true;
 
 
-  static public void init(File file) {
+  static public void init(File file) throws IOException {
+    if (file == null) {
+      BaseNoGui.getPlatform().fixSettingsLocation();
+    }
     if (file != null) {
       preferencesFile = file;
     } else {
diff --git a/arduino-core/src/processing/app/windows/Platform.java b/arduino-core/src/processing/app/windows/Platform.java
index 394a915ce..b1f726ca9 100644
--- a/arduino-core/src/processing/app/windows/Platform.java
+++ b/arduino-core/src/processing/app/windows/Platform.java
@@ -35,6 +35,9 @@ import processing.app.legacy.PConstants;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
@@ -54,7 +57,7 @@ public class Platform extends processing.app.Platform {
   }
 
   private void recoverSettingsFolderPath() throws IOException {
-    String path = Advapi32Util.registryGetStringValue(WinReg.HKEY_CURRENT_USER, "Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Shell Folders", "AppData");
+    String path = Advapi32Util.registryGetStringValue(WinReg.HKEY_CURRENT_USER, "Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Shell Folders", "Local AppData");
     this.settingsFolder = new File(path, "Arduino15");
   }
 
@@ -220,4 +223,23 @@ public class Platform extends processing.app.Platform {
 
   public void chmod(File file, int mode) throws IOException, InterruptedException {
   }
+
+  @Override
+  public void fixSettingsLocation() throws IOException {
+    String path = Advapi32Util.registryGetStringValue(WinReg.HKEY_CURRENT_USER, "Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Shell Folders", "AppData");
+    Path previousSettingsFolder = Paths.get(path, "Arduino15");
+    if (!Files.exists(previousSettingsFolder)) {
+      return;
+    }
+
+    if (!Files.exists(previousSettingsFolder.resolve(Paths.get("preferences.txt")))) {
+      return;
+    }
+
+    if (settingsFolder.exists()) {
+      return;
+    }
+
+    Files.move(previousSettingsFolder, settingsFolder.toPath());
+  }
 }