Add type parameter renaming support

src/python_minifier/__init__.py

@@ -166,6 +166,18 @@ def minify(
         rename_globals = False
         rename_locals = False
 
+    if preserve_locals is None:
+        preserve_locals = []
+    elif isinstance(preserve_locals, str):
+        preserve_locals = [preserve_locals]
+    if preserve_globals is None:
+        preserve_globals = []
+    elif isinstance(preserve_globals, str):
+        preserve_globals = [preserve_globals]
+
+    preserve_locals.extend(module.preserved)
+    preserve_globals.extend(module.preserved)
+
     allow_rename_locals(module, rename_locals, preserve_locals)
     allow_rename_globals(module, rename_globals, preserve_globals)
 

src/python_minifier/rename/bind_names.py

@@ -15,6 +15,7 @@ class NameBinder(NodeVisitor):
     def __call__(self, module):
         assert isinstance(module, ast.Module)
         module.tainted = False
+        module.preserved = set()
         return self.visit(module)
 
     def get_binding(self, name, namespace):
@@ -161,6 +162,24 @@ def visit_MatchMapping(self, node):
 
         self.generic_visit(node)
 
+    def visit_TypeVar(self, node):
+        if node.name not in node.namespace.nonlocal_names:
+            self.get_binding(node.name, node.namespace).add_reference(node)
+
+        get_global_namespace(node.namespace).preserved.add(node.name)
+
+    def visit_TypeVarTuple(self, node):
+        if node.name not in node.namespace.nonlocal_names:
+            self.get_binding(node.name, node.namespace).add_reference(node)
+
+        get_global_namespace(node.namespace).preserved.add(node.name)
+
+    def visit_ParamSpec(self, node):
+        if node.name not in node.namespace.nonlocal_names:
+            self.get_binding(node.name, node.namespace).add_reference(node)
+
+        get_global_namespace(node.namespace).preserved.add(node.name)
+
 def bind_names(module):
     """
     Bind names to their local namespace

src/python_minifier/rename/binding.py

@@ -130,6 +130,12 @@ def additional_byte_cost(self):
                 pass
             elif is_ast_node(node, 'MatchMapping'):
                 pass
+            elif is_ast_node(node, 'TypeVar'):
+                pass
+            elif is_ast_node(node, 'TypeVarTuple'):
+                pass
+            elif is_ast_node(node, 'ParamSpec'):
+                pass
 
             else:
                 raise AssertionError('Unknown reference node')
@@ -177,6 +183,12 @@ def old_mention_count(self):
                 pass
             elif is_ast_node(node, 'MatchMapping'):
                 pass
+            elif is_ast_node(node, 'TypeVar'):
+                pass
+            elif is_ast_node(node, 'TypeVarTuple'):
+                pass
+            elif is_ast_node(node, 'ParamSpec'):
+                pass
 
             else:
                 raise AssertionError('Unknown reference node')
@@ -220,6 +232,12 @@ def new_mention_count(self):
                 mentions += 1
             elif is_ast_node(node, 'MatchMapping'):
                 mentions += 1
+            elif is_ast_node(node, 'TypeVar'):
+                mentions += 1
+            elif is_ast_node(node, 'TypeVarTuple'):
+                mentions += 1
+            elif is_ast_node(node, 'ParamSpec'):
+                mentions += 1
 
             else:
                 raise AssertionError('Unknown reference node')
@@ -386,6 +404,12 @@ def rename(self, new_name):
                 node.name = new_name
             elif is_ast_node(node, 'MatchMapping'):
                 node.rest = new_name
+            elif is_ast_node(node, 'TypeVar'):
+                node.name = new_name
+            elif is_ast_node(node, 'TypeVarTuple'):
+                node.name = new_name
+            elif is_ast_node(node, 'ParamSpec'):
+                node.name = new_name
 
         if func_namespace_binding is not None:
             func_namespace_binding.body = list(

xtest/manifests/python3.10_test_manifest.yaml

@@ -865,17 +865,21 @@
     rename_globals: true
 /usr/local/lib/python3.10/test/test_contextlib_async.py:
 - options:
-    preserve_locals: baz
+    preserve_locals:
+    - baz
 - options:
     rename_globals: true
-    preserve_locals: baz
+    preserve_locals:
+    - baz
 - options:
     remove_literal_statements: true
-    preserve_locals: baz
+    preserve_locals:
+    - baz
 - options:
     remove_literal_statements: true
     rename_globals: true
-    preserve_locals: baz
+    preserve_locals:
+    - baz
 /usr/local/lib/python3.10/test/test_copy.py:
 - options: {}
 - options:

xtest/manifests/python3.11_test_manifest.yaml

@@ -188,17 +188,21 @@
 /usr/local/lib/python3.11/test/test_asyncio/test_futures.py: []
 /usr/local/lib/python3.11/test/test_asyncio/test_futures2.py:
 - options:
-    preserve_locals: future
+    preserve_locals:
+    - future
 - options:
     rename_globals: true
-    preserve_locals: future
+    preserve_locals:
+    - future
 - options:
     remove_literal_statements: true
-    preserve_locals: future
+    preserve_locals:
+    - future
 - options:
     remove_literal_statements: true
     rename_globals: true
-    preserve_locals: future
+    preserve_locals:
+    - future
 /usr/local/lib/python3.11/test/test_asyncio/test_locks.py:
 - options: {}
 - options:
@@ -2904,17 +2908,21 @@
     rename_globals: true
 /usr/local/lib/python3.11/test/test_opcache.py:
 - options:
-    preserve_locals: Class
+    preserve_locals:
+    - Class
 - options:
     rename_globals: true
-    preserve_locals: Class
+    preserve_locals:
+    - Class
 - options:
     remove_literal_statements: true
-    preserve_locals: Class
+    preserve_locals:
+    - Class
 - options:
     remove_literal_statements: true
     rename_globals: true
-    preserve_locals: Class
+    preserve_locals:
+    - Class
 /usr/local/lib/python3.11/test/test_opcodes.py:
 - options: {}
 - options:

xtest/manifests/python3.12_test_manifest.yaml

@@ -4740,20 +4740,24 @@
   status: passing
 /usr/local/lib/python3.12/test/test_opcache.py:
 - options:
-    preserve_locals: Class
+    preserve_locals:
+    - Class
     remove_literal_statements: true
     rename_globals: true
   status: passing
 - options:
-    preserve_locals: Class
+    preserve_locals:
+    - Class
     rename_globals: true
   status: passing
 - options:
-    preserve_locals: Class
+    preserve_locals:
+    - Class
     remove_literal_statements: true
   status: passing
 - options:
-    preserve_locals: Class
+    preserve_locals:
+    - Class
   status: passing
 /usr/local/lib/python3.12/test/test_opcodes.py:
 - options: