fix!: remove deprecated config.tcl support

resolves TinyTapeout#77

config_utils.py

@@ -3,7 +3,6 @@
 import os
 import re
 import subprocess
-import tkinter
 from collections.abc import Iterable
 
 import yaml
@@ -13,35 +12,6 @@ class ConfigFileError(Exception):
     pass
 
 
-def read_tcl_config(file: str, design_dir: str | None = None):
-    logging.warning(
-        "Support for TCL configuration files is deprecated and will be removed"
-    )
-    if design_dir is None:
-        design_dir = os.path.dirname(file)
-    design_dir = os.path.realpath(design_dir)
-    tcl_code = open(file).read()
-    interp = tkinter.Tcl()
-    interp.eval("array unset ::env")
-    interp.setvar("env(DESIGN_DIR)", design_dir)
-    config = {}
-    env_rx = re.compile(r"(?:\:\:)?env\((\w+)\)")
-
-    def py_set(key: str, value: str | None = None):
-        if match := env_rx.fullmatch(key):
-            if value is not None:
-                value = value.replace(design_dir, "dir::")
-                value = value.replace("dir::/", "dir::")
-                config[match.group(1)] = value
-
-    py_set_name = interp.register(py_set)
-    interp.call("rename", py_set_name, "_py_set")
-    interp.call("rename", "set", "_orig_set")
-    interp.eval("proc set args { _py_set {*}$args; tailcall _orig_set {*}$args; }")
-    interp.eval(tcl_code)
-    return config
-
-
 def read_json_config(file: str):
     config = json.load(open(file))
     config.pop("//", None)
@@ -84,9 +54,7 @@ def read_config(basename: str, formats: Iterable[str], design_dir: str | None =
     for fmt in formats:
         file = f"{basename}.{fmt}"
         if os.path.exists(file):
-            if fmt == "tcl":
-                return read_tcl_config(file, design_dir)
-            elif fmt == "json":
+            if fmt == "json":
                 return read_json_config(file)
             elif fmt == "yaml":
                 return read_yaml_config(file)
@@ -99,19 +67,6 @@ def read_config(basename: str, formats: Iterable[str], design_dir: str | None =
     )
 
 
-def write_tcl_config(config: dict, file: str):
-    logging.warning(
-        "Support for TCL configuration files is deprecated and will be removed"
-    )
-    with open(file, "w") as f:
-        for key, value in config.items():
-            if type(value) in (list, tuple):
-                value = " ".join(value)
-            if type(value) == str:
-                value = value.replace("dir::", "$::env(DESIGN_DIR)/")
-            print(f'set ::env({key}) "{value}"', file=f)
-
-
 def write_json_config(config: dict, file: str):
     with open(file, "w") as f:
         json.dump(config, f, indent=2)
@@ -135,9 +90,7 @@ def write_mk_config(config: dict, file: str):
 def write_config(config: dict, basename: str, formats: Iterable[str]):
     for fmt in formats:
         file = f"{basename}.{fmt}"
-        if fmt == "tcl":
-            write_tcl_config(config, file)
-        elif fmt == "json":
+        if fmt == "json":
             write_json_config(config, file)
         elif fmt == "yaml":
             write_yaml_config(config, file)