Fallback to expected CI arduino folder /home/runner/Arduino

Author: tyeth

build_platform.py

@@ -479,21 +479,30 @@ def main():
         # Inject boards.local.txt if requested
         if COPY_BOARDS_LOCAL_TXT and boards_local_txt:
             try:
+                local_app_data_dir = os.environ.get('HOME', '')
+                data_dir = None
+                if os.path.exists(os.path.join(local_app_data_dir, 'Arduino')):
+                    data_dir = os.path.join(local_app_data_dir, 'Arduino')
+                elif os.path.exists(os.path.join(local_app_data_dir, '.arduino15')):
+                    data_dir = os.path.join(local_app_data_dir, '.arduino15')
+                elif os.path.exists(os.path.join(local_app_data_dir, '.arduino')):
+                    data_dir = os.path.join(local_app_data_dir, '.arduino')
+
                 # Get arduino-cli data directory
                 import json
-                config_output = subprocess.check_output(["arduino-cli", "config", "dump", "--format", "json"]).decode()
+                if data_dir:
+                    config_output = subprocess.check_output(["arduino-cli", "config", "dump", "--format", "json", "--config-dir", data_dir]).decode()
+                else:
+                    config_output = subprocess.check_output(["arduino-cli", "config", "dump", "--format", "json"]).decode()
                 config = json.loads(config_output)
                 ColorPrint.print_info(f"Using arduino-cli config: {config_output.strip()}")
 
                 # Extract data directory, with fallback to default
-                data_dir = config.get("directories", {}).get("data", "")
+                data_dir = config.get("directories", {}).get("data", data_dir)
                 if not data_dir:
-                    ColorPrint.print_warn("No data directory found in arduino-cli config, using fallback locations.")
-                    # Fallback to common default locations
-                    if os.name == 'nt':  # Windows
-                        data_dir = os.path.join(os.environ.get('LOCALAPPDATA', ''), 'Arduino15')
-                    else:  # Linux/macOS
-                        data_dir = os.path.join(os.environ.get('HOME', ''), '.arduino15')
+                    ColorPrint.print_warn("No valid data directory found, cannot copy boards.local.txt")
+                    continue
+
                 ColorPrint.print_info(f"Using data directory: {data_dir}")
 
                 # Parse platform vendor and architecture from core_fqbn (e.g., "adafruit:samd")
@@ -507,8 +516,10 @@ def main():
 
                 ColorPrint.print_info(f"Using vendor: {vendor}, architecture: {architecture}")
 
-                # Construct base platform path
-                platform_base = os.path.join(data_dir, "packages", vendor, "hardware", architecture)
+                # Construct base platform path, fall back to architecture if vendor rebadged BSP.
+                platform_base = os.path.join(data_dir, "packages", vendor, "hardware", architecture) if \
+                    os.path.exists(os.path.join(data_dir, "packages", vendor, "hardware", architecture)) else \
+                    os.path.join(data_dir, "packages", architecture, "hardware", architecture)
 
                 # Find the latest version directory
                 if os.path.exists(platform_base):