Better snap compatibility

Author: Stefterv

app/build.gradle.kts

@@ -238,6 +238,7 @@ tasks.register("generateSnapConfiguration"){
           - x11
           - network
           - opengl
+          - home
     
     parts:
       processing:

app/src/processing/app/platform/LinuxPlatform.java

@@ -33,8 +33,7 @@
 
 
 public class LinuxPlatform extends DefaultPlatform {
-  // Switched to use ~ as the home directory for compatibility with snap
-  String homeDir = "~";
+  String homeDir;
 
 
   public void initBase(Base base) {
@@ -107,6 +106,10 @@ public File getSettingsFolder() throws Exception {
         configHome = null;  // don't use non-existent folder
       }
     }
+    String snapUserCommon = System.getenv("SNAP_USER_COMMON");
+    if (snapUserCommon != null && !snapUserCommon.isBlank()) {
+      configHome = new File(snapUserCommon);
+    }
     // If not set properly, use the default
     if (configHome == null) {
       configHome = new File(getHomeDir(), ".config");