Partition_Wizard compatible with grow on mount (#19645)

lib/libesp32/berry_tasmota/src/be_tasmota_lib.c

@@ -5,6 +5,7 @@
  *******************************************************************/
 #include "be_constobj.h"
 #include "be_ctypes.h"
+#include "be_mapping.h"
 
 extern struct TasmotaGlobal_t TasmotaGlobal;
 extern struct TSettings * Settings;
@@ -62,6 +63,10 @@ extern int l_i2cenabled(bvm *vm);
 extern int tasm_find_op(bvm *vm);
 extern int tasm_apply_str_op(bvm *vm);
 
+// tasmota.version() -> int
+extern int32_t be_Tasmota_version(void);
+BE_FUNC_CTYPE_DECLARE(be_Tasmota_version, "i", "-");
+
 #include "solidify/solidified_tasmota_class.h"
 #include "solidify/solidified_rule_matcher.h"
 #include "solidify/solidified_trigger_class.h"
@@ -137,6 +142,7 @@ class be_class_tasmota (scope: global, name: Tasmota) {
     get_switches, func(l_getswitch)
 
     i2c_enabled, func(l_i2cenabled)
+    version, ctype_func(be_Tasmota_version)
 
     fast_loop, closure(Tasmota_fast_loop_closure)
     add_fast_loop, closure(Tasmota_add_fast_loop_closure)

tasmota/berry/modules/Partition_Wizard/partition_wizard.be

@@ -249,8 +249,10 @@ class Partition_wizard_UI
       webserver.content_send(string.format("<p>You can expand the file system by %i KB.<br>Its content will be lost.</p>", unallocated))
 
       webserver.content_send("<form action='/part_wiz' method='post' ")
-      webserver.content_send("onsubmit='return confirm(\"This will DELETE the content of the file system and cause a restart.\");'>")
-      webserver.content_send("<p></p><button name='max_fs' class='button bred'>Resize FS to max</button></form></p>")
+      if !self.support_grow_on_mount()
+        webserver.content_send("onsubmit='return confirm(\"This will DELETE the content of the file system and cause a restart.\");'")
+      end
+      webserver.content_send("><p></p><button name='max_fs' class='button bred'>Resize FS to max</button></form></p>")
       
       webserver.content_send("<p></p></fieldset><p></p>")
     elif self.has_factory_layout(p)
@@ -679,6 +681,21 @@ class Partition_wizard_UI
     webserver.content_stop()                        #- end of web page -#
   end
 
+  #######################################################################
+  # returns true is LittleFS supports grow on mount
+  #
+  # True if version is above 13.1.0.3
+  #######################################################################
+  def support_grow_on_mount()
+    import introspect
+    if introspect.get(tasmota, "version") != nil
+      if tasmota.version() >= 0x0D010003
+        return true
+      end
+    end
+    return false
+  end
+
   #######################################################################
   # Web Controller, called by POST to `/part_wiz`
   #######################################################################
@@ -710,7 +727,9 @@ class Partition_wizard_UI
         var fs_slot = p.slots[-1]
         fs_slot.sz += unallocated * 1024
         p.save()
+        if !self.support_grow_on_mount()
           p.invalidate_spiffs()   # erase SPIFFS or data is corrupt
+        end
 
         #- and force restart -#
         webserver.redirect("/?rst=")

tasmota/tasmota_xdrv_driver/xdrv_52_3_berry_tasmota.ino

@@ -535,6 +535,11 @@ extern "C" {
     be_pushint(vm, ret);
     be_return(vm);
   }
+
+  int32_t be_Tasmota_version(void) {
+    return VERSION;
+  }
+
   /*
 
   # test patterns for all-in-one version