fix: patch nimconfig.h with #ifndef guards for ROLE defines to eliminate redefinition warnings

pre_build.py

@@ -100,5 +100,66 @@ def patch_sdkconfig_bt():
         print("BLE/NimBLE already configured in sdkconfig")
 
 
+def patch_nimconfig():
+    # Find nimconfig.h in the NimBLE-Arduino library
+    search_dirs = [
+        os.path.join(os.getcwd(), ".pio", "libdeps"),
+        os.path.expanduser("~/.platformio/lib"),
+    ]
+    for env_dir in ["esp32s3", ""]:
+        candidate = os.path.join(
+            os.getcwd(), ".pio", "libdeps",
+            env_dir, "NimBLE-Arduino", "src", "nimconfig.h"
+        ) if env_dir else ""
+        if candidate and os.path.exists(candidate):
+            nimconfig_path = candidate
+            break
+    else:
+        # Walk search dirs as fallback
+        nimconfig_path = None
+        for base in search_dirs:
+            if not os.path.exists(base):
+                continue
+            for root, _dirs, files in os.walk(base):
+                if "nimconfig.h" in files:
+                    nimconfig_path = os.path.join(root, "nimconfig.h")
+                    break
+            if nimconfig_path:
+                break
+
+    if not nimconfig_path:
+        print("WARNING: nimconfig.h not found, skipping ROLE define patch")
+        return
+
+    print(f"Patching {nimconfig_path} with #ifndef guards for ROLE defines")
+
+    with open(nimconfig_path, 'r') as f:
+        content = f.read()
+
+    for role in ["CENTRAL", "OBSERVER", "PERIPHERAL", "BROADCASTER"]:
+        pattern = re.compile(
+            '#ifndef CONFIG_BT_NIMBLE_ROLE_' + role + '_DISABLED\n'
+            '#define CONFIG_BT_NIMBLE_ROLE_' + role + '\n'
+            '#endif'
+        )
+        replacement = (
+            '#ifndef CONFIG_BT_NIMBLE_ROLE_' + role + '_DISABLED\n'
+            '#ifndef CONFIG_BT_NIMBLE_ROLE_' + role + '\n'
+            '#define CONFIG_BT_NIMBLE_ROLE_' + role + '\n'
+            '#endif\n'
+            '#endif'
+        )
+        if pattern.search(content):
+            content = pattern.sub(replacement, content)
+            print(f"  Guarded CONFIG_BT_NIMBLE_ROLE_{role}")
+        else:
+            print(f"  NOTE: CONFIG_BT_NIMBLE_ROLE_{role} pattern not found (may already be guarded)")
+
+    with open(nimconfig_path, 'w') as f:
+        f.write(content)
+    print("nimconfig.h patched successfully")
+
+
 patch_usb_ids()
 patch_sdkconfig_bt()
+patch_nimconfig()