Support multiple python versions for code generation

codegen/__main__.py

@@ -1,3 +1,4 @@
+from typing import Dict
 from codegen.datatypes import CDataType
 from codegen.dbl_list.make_dbl_list import DblListData, make_dbl_list
 
@@ -7,7 +8,7 @@ def main():
 
 
 def gen_dbl_list():
-    datatypes: dict[CDataType, DblListData] = {}
+    datatypes: Dict[CDataType, DblListData] = {}
     make_dbl_list(datatypes)
 
 

codegen/datatypes.py

@@ -1,6 +1,6 @@
 from enum import Enum
 from pathlib import Path
-from typing import Optional, Union
+from typing import Optional, Union, List
 from dataclasses import dataclass, field
 
 
@@ -70,7 +70,7 @@ class CEnumVal:
 @dataclass
 class CEnum:
     name: str
-    values: list[CEnumVal]
+    values: List[CEnumVal]
     typedef: bool = False
 
     def __str__(self) -> str:
@@ -100,8 +100,8 @@ class CMacro:
 @dataclass
 class CStruct:
     name: str
-    cargs: list["CArg"]
-    typedef_name: str | None = None
+    cargs: List["CArg"]
+    typedef_name: Optional[str] = None
 
     def __str__(self) -> str:
         return self.declare() + self.define()
@@ -145,10 +145,10 @@ class CArg:
 class CFunc:
     name: str
     ret_type: CDataType
-    args: list[CArg]
+    args: List[CArg]
     body: str
     pointer: CPointer = field(default_factory=CPointer)
-    qualifiers: list[CQualifier] = field(default_factory=list)
+    qualifiers: List[CQualifier] = field(default_factory=list)
 
     def __str__(self) -> str:
         qualifiers = ""
@@ -203,8 +203,8 @@ class CInclude:
 class CFile:
     name: str
     extension: str
-    decl_types: list[CStruct] = field(default_factory=list)
-    macros: list[CMacro] = field(default_factory=list)
+    decl_types: List[CStruct] = field(default_factory=list)
+    macros: List[CMacro] = field(default_factory=list)
 
     def save(self, output_dir: Path):
         output_file = output_dir / f"{self.name}.{self.extension}"
@@ -223,9 +223,9 @@ class CFile:
 @dataclass
 class CHeader(CFile):
     extension: str = "h"
-    includes: list[CInclude] = field(default_factory=list)
-    types: list[CUserType] = field(default_factory=list)
-    funcs: list[CFunc] = field(default_factory=list)
+    includes: List[CInclude] = field(default_factory=list)
+    types: List[CUserType] = field(default_factory=list)
+    funcs: List[CFunc] = field(default_factory=list)
 
     def __str__(self) -> str:
         name_upper = self.name.upper()
@@ -275,10 +275,10 @@ class CHeader(CFile):
 @dataclass
 class CSource(CFile):
     extension: str = "c"
-    includes: list[CInclude] = field(default_factory=list)
-    types: list[CUserType] = field(default_factory=list)
-    internal_funcs: list[CFunc] = field(default_factory=list)
-    funcs: list[CFunc] = field(default_factory=list)
+    includes: List[CInclude] = field(default_factory=list)
+    types: List[CUserType] = field(default_factory=list)
+    internal_funcs: List[CFunc] = field(default_factory=list)
+    funcs: List[CFunc] = field(default_factory=list)
 
     def __str__(self) -> str:
         includes = _get_includes_string(self.includes)
@@ -333,7 +333,7 @@ def get_datatype_string(_type: CDataType) -> str:
         return _type
 
 
-def _get_includes_string(includes: list[CInclude]) -> str:
+def _get_includes_string(includes: List[CInclude]) -> str:
     output = ""
     for include in sorted(includes, key=lambda inc: inc.local, reverse=True):
         output += str(include)

codegen/dbl_list/make_dbl_list.py

@@ -1,7 +1,8 @@
 from pathlib import Path
 from dataclasses import dataclass, field
+from typing import List, Dict
 from codegen.constants import WAPP_SRC_ROOT
-from codegen.utils import load_func_body_from_file
+from codegen.utils import load_func_body_from_file, convert_to_relative
 from codegen.datatypes import (
     CDataType,
     CMacro,
@@ -23,11 +24,11 @@ from codegen.datatypes import (
 class DblListData:
     node_typename: str
     list_typename: str
-    hdr_decl_types: list[CStruct] = field(default_factory=list)
-    src_decl_types: list[CStruct] = field(default_factory=list)
+    hdr_decl_types: List[CStruct] = field(default_factory=list)
+    src_decl_types: List[CStruct] = field(default_factory=list)
 
 
-def make_dbl_list(user_datatypes: dict[CDataType, DblListData] = {}):
+def make_dbl_list(user_datatypes: Dict[CDataType, DblListData] = {}):
     def __format_func_body(
         filename: Path,
         type_string: str,
@@ -50,18 +51,18 @@ def make_dbl_list(user_datatypes: dict[CDataType, DblListData] = {}):
     common_local_include_files = [
         (WAPP_SRC_ROOT / "common" / "aliases" / "aliases.h")
     ]
-    common_includes: list[CInclude] = [
+    common_includes: List[CInclude] = [
         CInclude(header="stdbool.h")
     ]
     for local_file in common_local_include_files:
         common_includes.append(
             CInclude(
-                header=str(local_file.relative_to(out_dir, walk_up=True)),
+                header=str(convert_to_relative(local_file, out_dir)),
                 local=True,
             )
         )
 
-    common_decl_types: list[CStruct] = []
+    common_decl_types: List[CStruct] = []
 
     datatypes: dict[CDataType, DblListData] = {
         "Str8": DblListData(

codegen/utils.py

@@ -1,6 +1,18 @@
+import os
+import sys
 from pathlib import Path
 
 
 def load_func_body_from_file(filename: Path) -> str:
     with open(filename, "r") as infile:
         return infile.read().rstrip()
+
+
+def convert_to_relative(path: Path, target: Path) -> Path:
+    major = sys.version_info.major
+    minor = sys.version_info.minor
+
+    if major >= 3 and minor >= 12:
+        return path.relative_to(target, walk_up=True)
+    else:
+        return Path(os.path.relpath(str(path), start=str(target)))