Custom recipes implementation via arguments

.gitignore

@@ -19,4 +19,3 @@ src/ios/ios.c
 *.DS_Store*
 *-ios/
 __pycache__
-custom_recipes

toolchain.py

@@ -394,6 +394,8 @@ def __init__(self):
             num_cores = None
         self.num_cores = num_cores if num_cores else 4  # default to 4 if we can't detect
 
+        self.custom_recipes_paths = []
+
         ensure_dir(self.root_dir)
         ensure_dir(self.build_dir)
         ensure_dir(self.cache_dir)
@@ -1006,10 +1008,19 @@ def get_recipe(cls, name, ctx):
                 recipe = mod.recipe
                 recipe.recipe_dir = join(ctx.root_dir, "recipes", name)
             except ImportError:
-                logger.info("Looking for recipe '{}' in custom_recipes folder (if present)".format(name))
-                mod = importlib.import_module("custom_recipes.{}".format(name))
-                recipe = mod.recipe
-                recipe.recipe_dir = join(ctx.root_dir, "custom_recipes", name)
+                logger.info("Looking for recipe '{}' in custom recipes paths (if provided)".format(name))
+                for custom_recipe_path in ctx.custom_recipes_paths:
+                    if custom_recipe_path.split('/')[-1] == name:
+                        spec = importlib.util.spec_from_file_location(name,
+                                                    join(custom_recipe_path, '__init__.py' ))
+                        mod = importlib.util.module_from_spec(spec)
+                        spec.loader.exec_module(mod)
+                        recipe = mod.recipe
+                        recipe.recipe_dir = custom_recipe_path
+                        logger.info("Custom recipe '{}' found in folder {}".format(name, custom_recipe_path))
+                        break
+                else:
+                    raise
             recipe.init_after_import(ctx)
 
         if version:
@@ -1299,6 +1310,8 @@ def build(self):
                                 help="do not use pigz for gzip decompression")
             parser.add_argument("--no-pbzip2", action="store_true", default=not bool(ctx.use_pbzip2),
                                 help="do not use pbzip2 for bzip2 decompression")
+            parser.add_argument("--add-custom-recipe", action="append", default=[],
+                                help="Path to custom recipe")
             args = parser.parse_args(sys.argv[2:])
 
             if args.arch:
@@ -1325,6 +1338,12 @@ def build(self):
                 logger.info("Using pigz to decompress gzip data")
             if ctx.use_pbzip2:
                 logger.info("Using pbzip2 to decompress bzip2 data")
+            for custom_recipe_path in args.add_custom_recipe:
+                if exists(custom_recipe_path):
+                    logger.info(f"Adding {custom_recipe_path} to custom recipes paths")
+                    ctx.custom_recipes_paths.append(custom_recipe_path)
+                else:
+                    logger.error(f"{custom_recipe_path} isn't a valid path")
             build_recipes(args.recipe, ctx)
 
         def recipes(self):