Addons directory (#4893)

* Add addons directory

* add addons dir to modules dirs automatically

---------

Co-authored-by: iLLiCiTiT <jakub.trllo@gmail.com>

.gitignore

@@ -112,3 +112,9 @@ tools/run_eventserver.*
 tools/dev_*
 
 .github_changelog_generator
+
+
+# Addons
+########
+/openpype/addons/*
+!/openpype/addons/README.md

openpype/addons/README.md

@@ -0,0 +1,3 @@
+This directory is for storing external addons that needs to be included in the pipeline when distributed.
+
+The directory is ignored by Git, but included in the zip and installation files.

openpype/modules/base.py

@@ -311,6 +311,7 @@ def _load_modules():
     # Look for OpenPype modules in paths defined with `get_module_dirs`
     #   - dynamically imported OpenPype modules and addons
     module_dirs = get_module_dirs()
+
     # Add current directory at first place
     #   - has small differences in import logic
     current_dir = os.path.abspath(os.path.dirname(__file__))
@@ -318,8 +319,11 @@ def _load_modules():
     module_dirs.insert(0, hosts_dir)
     module_dirs.insert(0, current_dir)
 
+    addons_dir = os.path.join(os.path.dirname(current_dir), "addons")
+    module_dirs.append(addons_dir)
+
     processed_paths = set()
-    for dirpath in module_dirs:
+    for dirpath in frozenset(module_dirs):
         # Skip already processed paths
         if dirpath in processed_paths:
             continue