Platform independent searching for binaries in engine directory

src/engines/blender_engine.py

@@ -13,6 +13,7 @@ class Blender(BaseRenderEngine):
 
     install_paths = ['/Applications/Blender.app/Contents/MacOS/Blender']
     supported_extensions = ['.blend']
+    binary_names = {'linux': 'blender', 'windows': 'blender.exe', 'macos': 'Blender.app'}
 
     def version(self):
         version = None

src/engines/engine_manager.py

@@ -4,6 +4,7 @@ import platform
 import shutil
 from .downloaders.blender_downloader import BlenderDownloader
 from .downloaders.ffmpeg_downloader import FFMPEGDownloader
+from ..utilities.misc_helper import system_safe_path
 
 try:
     from .blender_engine import Blender
@@ -37,14 +38,25 @@ class EngineManager:
                 # Split the input string by dashes to get segments
                 segments = directory.split('-')
 
-                # Define the keys for each word
-                keys = ["engine", "version", "system_os", "cpu"]
-
                 # Create a dictionary with named keys
-                executable_names = {'linux': 'blender', 'windows': 'blender.exe', 'macos': 'Blender.app'}
+                keys = ["engine", "version", "system_os", "cpu"]
                 result_dict = {keys[i]: segments[i] for i in range(min(len(keys), len(segments)))}
-                result_dict['path'] = os.path.join(cls.engines_path, directory, executable_names.get(result_dict['system_os'], 'unknown'))
                 result_dict['type'] = 'managed'
+
+                # Figure out the binary name for the path
+                binary_name = result_dict['engine'].lower()
+                for eng in cls.supported_engines():
+                    if eng.name().lower() == result_dict['engine']:
+                        binary_name = eng.binary_names.get(result_dict['system_os'], binary_name)
+
+                # Find path to binary
+                path = None
+                for root, _, files in os.walk(system_safe_path(os.path.join(cls.engines_path, directory))):
+                    if binary_name in files:
+                        path = os.path.join(root, binary_name)
+                        break
+
+                result_dict['path'] = path
                 results.append(result_dict)
         except FileNotFoundError:
             logger.warning("Cannot find local engines download directory")
@@ -113,11 +125,15 @@ class EngineManager:
             return
 
         # Get the appropriate downloader class based on the engine type
-        downloader = downloader_classes[engine]
+        downloader_classes[engine].download_engine(version, download_location=cls.engines_path,
-        if downloader.download_engine(version, download_location=cls.engines_path, system_os=system_os, cpu=cpu):
+                                                   system_os=system_os, cpu=cpu)
-            return cls.has_engine_version(engine, version, system_os, cpu)
+
-        else:
+        # Check that engine was properly downloaded
+        found_engine = cls.has_engine_version(engine, version, system_os, cpu)
+        if not found_engine:
             logger.error(f"Error downloading {engine}")
+        return found_engine
+
 
     @classmethod
     def delete_engine_download(cls, engine, version, system_os=None, cpu=None):

src/engines/ffmpeg_engine.py

@@ -7,6 +7,8 @@ import re
 
 class FFMPEG(BaseRenderEngine):
 
+    binary_names = {'linux': 'ffmpeg', 'windows': 'ffmpeg.exe', 'macos': 'ffmpeg'}
+
     def version(self):
         version = None
         try: