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config_utils.py
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config_utils.py
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import json
import logging
import os
import re
import subprocess
import tkinter
from collections.abc import Iterable
import yaml
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)
return config
def read_yaml_config(file: str):
return yaml.safe_load(open(file))
def read_mk_config(file: str, design_dir: str | None = None):
logging.warning(
"Reading Makefile configuration files is an experimental feature and could be removed"
)
env_pre = {} if design_dir is None else {"DESIGN_HOME": design_dir}
mk_cg = "all:\n\t@env"
mk_tg = f"-include {file}\n{mk_cg}"
env_cg = subprocess.run(
"make -f -",
shell=True,
env=env_pre,
input=mk_cg,
capture_output=True,
text=True,
).stdout.strip()
env_tg = subprocess.run(
"make -f -",
shell=True,
env=env_pre,
input=mk_tg,
capture_output=True,
text=True,
).stdout.strip()
env_diff = set(env_tg.split("\n")) - set(env_cg.split("\n"))
config = dict(i.split("=", 1) for i in env_diff)
return config
def read_config(basename: str, formats: Iterable[str], design_dir: str | None = 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":
return read_json_config(file)
elif fmt == "yaml":
return read_yaml_config(file)
elif fmt == "mk":
return read_mk_config(file)
else:
raise ConfigFileError(f"Unexpected configuration file format: {fmt}")
raise ConfigFileError(
f"Could not file configuration file {basename}.{{{'|'.join(formats)}}}"
)
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::", "$::env(DESIGN_DIR)/")
print(f'set ::env({key}) "{value}"', file=f)
def write_json_config(config: dict, file: str):
with open(file, "w") as f:
json.dump(config, f, indent=2)
def write_yaml_config(config: dict, file: str):
with open(file, "w") as f:
yaml.safe_dump(config, f, default_flow_style=False, sort_keys=False)
def write_mk_config(config: dict, file: str):
with open(file, "w") as f:
for key, value in config.items():
if type(value) in (list, tuple):
value = " ".join(value)
if type(value) == str:
value = value.replace("dir::", "$(DESIGN_HOME)/")
print(f"export {key} = {value}", file=f)
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":
write_json_config(config, file)
elif fmt == "yaml":
write_yaml_config(config, file)
elif fmt == "mk":
write_mk_config(config, file)
else:
raise ConfigFileError("Unexpected configuration file format: {fmt}")