xconv: Make profile system more flexible

Can now select from multiple profiles per file and import from arbitrary modules

lib/python/xconv/profile.py

@@ -25,7 +25,7 @@ xconv ffmpeg wrapper based on AdvancedAV
 Decorators for defining xconv profiles
 """
 
-from .profileman import index
+from .profileman import index, make_qname
 
 from functools import wraps
 
@@ -39,6 +39,7 @@ __all__ = [
     "singleaudio"
 ]
 
+
 # == Misc. helpers ==
 def __update(f, name, update):
     if hasattr(f, name):
@@ -65,7 +66,7 @@ def profile(f):
         ext=None,
         defines={},
         features={})
-    index[f.__name__] = f
+    index[make_qname(f.__module__, f.__name__)] = f
     return f
 
 

lib/python/xconv/profileman.py

@@ -32,33 +32,85 @@ from pathlib import Path
 # == Profile Index ==
 index = {}
 
+profiles_package = __package__ + ".profiles"
+
+
+def make_qname(module, name):
+    """
+    Create a qualified name for a profile
+    """
+    # The global profiles package is omitted from the front
+    if module.startswith("%s." % profiles_package):
+        module = module[len(profiles_package) + 1:]
+    # But arbitrary packages can be specified by prepending :
+    # This, among other things, allows to use profiles defined
+    # in .py files in the working dir.
+    else:
+        module = ":" + module
+
+    # If it's not deeply nested and the module name
+    # and profile name are the same, the latter
+    # can be omitted.
+    if module.strip(":") != name:
+        return "%s.%s" % (module, name)
+    else:
+        return module
+
+    # Examples:
+    # Profile xconv.profiles.opus/opus:
+    #  - opus
+    #  - opus.opus
+    #  - :xconv.profiles.opus.opus
+    # Watch out for xconv.profiles/opus (not valid):
+    #  - :xconv.profiles.opus
+    # Profile xconv.profiles.opus/stuff:
+    #  - opus.stuff
+    #  - :xconv.profiles.opus.stuff
+    # Profile test/test:
+    #  - :test
+    #  - :test.test
+
 
 def load_profile(name):
+    """
+    Find and load a XConv profile.
+    """
+    # Check if it's already loaded
     if name in index:
         return index[name]
 
-    try:
-        import_module(".profiles.%s" % name, __package__)
-    except ImportError as e:
-        print(e)
-        pass
+    # See if it's a qualified name
+    module = name.rsplit(".", 1)[0] if "." in name[1:] else name
 
-    if name in index:
-        return index[name]
+    # Check if it's in the global profiles package or not
+    if module[0] == ":":
+        module = module[1:]
+    else:
+        module = "." + module
 
-    load_all_profiles()
+    # Try to import the module
+    import_module(module, profiles_package)
 
-    if name in index:
+    # Return the profile
+    try:
         return index[name]
-
-    raise ImportError("Could not find XConv profile '%s'" % name)
+    except KeyError:
+        # Fully qualifying the global profiles package is technically valid.
+        if name.startswith(":%s." % profiles_package):
+            qname = make_qname(*name[1:].rsplit(".", 1))
+            if qname in index:
+                return index[qname]
+        raise ImportError("Module %s doesn't contain XConv profile %s" % (module, name))
 
 
 def load_all_profiles():
+    """
+    Load all profile definitions
+    """
     for location in profilepaths:
         for mod in (x for x in Path(location).iterdir() if x.is_file() and x.suffix == ".py"):
             try:
-                import_module(".profiles.%s" % mod.stem, __package__)
+                import_module(".%s" % mod.stem, profiles_package)
             except ImportError:
                 pass