LittleFS recursive display and erase. Cause we got directories now, baby!

src/FSCommon.cpp

@@ -1,22 +1,43 @@
 #include "configuration.h"
 #include "FSCommon.h"
 
+void listDir(fs::FS &fs, const char * dirname, uint8_t levels)
+#ifdef FSCom
+{
+    File root = fs.open(dirname);
+    if(!root){
+        return;
+    }
+    if(!root.isDirectory()){
+        return;
+    }
+
+    File file = root.openNextFile();
+    while(file){
+        if(file.isDirectory()){
+            if(levels){
+                listDir(fs, file.name(), levels -1);
+            }
+        } else {
+            DEBUG_MSG("  %s (%i Bytes)\n", file.name(), file.size());
+        }
+        file.close();
+        file = root.openNextFile();
+    }
+    file.close();
+#endif
+}
+
 void fsInit()
 {
 #ifdef FSCom
     if (!FSBegin())
     {
-        DEBUG_MSG("ERROR filesystem mount Failed\n");
+        DEBUG_MSG("ERROR filesystem mount Failed. Formatting...\n");
         assert(0); // FIXME - report failure to phone
     }
 
     DEBUG_MSG("Filesystem files:\n");
-    File dir = FSCom.open("/");
-    File f = dir.openNextFile();
-    while (f) {
-        DEBUG_MSG("  %s\n", f.name());
-        f.close();
-        f = dir.openNextFile();
-    }
+    listDir(FSCom, "/", 10);
 #endif
 }