Do not abort compile when safeboot firmware can not be downloaded (#21684)

* Message when dl of safeboot failed
* check for safeboot

pio-tools/post_esp32.py

@@ -181,18 +181,30 @@ def esp32_fetch_safeboot_bin(tasmota_platform):
     safeboot_fw_name = join(variants_dir, tasmota_platform + "-safeboot.bin")
     if(exists(safeboot_fw_name)):
         print("safeboot binary already in place.")
-        return
+        return True
     print("Will download safeboot binary from URL:")
     print(safeboot_fw_url)
+    try:
         response = requests.get(safeboot_fw_url)
         open(safeboot_fw_name, "wb").write(response.content)
         print("safeboot binary written to variants dir.")
+        return True
+    except:
+        print(Fore.RED + "Download of safeboot binary failed. Please check your Internet connection.")
+        print(Fore.RED + "Creation of " + tasmota_platform + "-factory.bin not possible")
+        print(Fore.YELLOW + "Without Internet " + Fore.GREEN + tasmota_platform + "-safeboot.bin" + Fore.YELLOW + " needs to be compiled before " + Fore.GREEN + tasmota_platform)
+        return False
 
 def esp32_copy_new_safeboot_bin(tasmota_platform,new_local_safeboot_fw):
     print("Copy new local safeboot firmware to variants dir -> using it for further flashing operations")
     safeboot_fw_name = join(variants_dir, tasmota_platform + "-safeboot.bin")
     if os.path.exists(variants_dir):
+        try:
             shutil.copy(new_local_safeboot_fw, safeboot_fw_name)
+            return True
+        except:
+            return False
+
 
 def esp32_create_combined_bin(source, target, env):
     #print("Generating combined binary for serial flashing")
@@ -235,10 +247,11 @@ def esp32_create_combined_bin(source, target, env):
     if not os.path.exists(variants_dir):
         os.makedirs(variants_dir)
     if "safeboot" in firmware_name:
-        esp32_copy_new_safeboot_bin(tasmota_platform,firmware_name)
+        s_flag = esp32_copy_new_safeboot_bin(tasmota_platform,firmware_name)
     else:
-        esp32_fetch_safeboot_bin(tasmota_platform)
+        s_flag = esp32_fetch_safeboot_bin(tasmota_platform)
 
+    if s_flag:  # check if safeboot firmware is existing
         flash_size = env.BoardConfig().get("upload.flash_size", "4MB")
         flash_mode = env["__get_board_flash_mode"](env)
         flash_freq = env["__get_board_f_flash"](env)
@@ -264,7 +277,7 @@ def esp32_create_combined_bin(source, target, env):
             cmd += [sect_adr, sect_file]
 
         # "main" firmware to app0 - mandatory, except we just built a new safeboot bin locally
-    if "safeboot" not in firmware_name:
+        if ("safeboot" not in firmware_name):
             print(f" - {hex(app_offset)} | {firmware_name}")
             cmd += [hex(app_offset), firmware_name]