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#!/usr/bin/env python3
#
# Copyright 2025 Ettus Research, a National Instruments Brand
#
# SPDX-License-Identifier: LGPL-3.0-or-later
#
# Checks whether all variables in a Diamond lpf file are defined before usage.
# This check is not done in Diamond, so there is no error or warning message for us to
# check for.
#
import argparse
import re
def parse_arguments():
parser = argparse.ArgumentParser(description="Check variables in a Diamond lpf file")
parser.add_argument("filename", type=str, help="The lpf file to check")
parser.add_argument("-v", "--verbose", action="store_true", help="Enable verbose output")
return parser.parse_args()
args = parse_arguments()
defined_variables = set()
pattern = re.compile(r"(@define\s+)?\$(\w+)")
# search the file line by line
with open(args.filename, "r") as f:
for line_number, line in enumerate(f, start=1):
position = 0
match = True
while match:
match = pattern.search(line, position)
if match:
# If group 1 is present we have a define and add the variable to the set
if match.group(1):
defined_variables.add(match.group(2))
if args.verbose:
print(f"Line {line_number},{position}: Define variable {match.group(2)}")
# Otherwise it is a usage and we check if the variable is defined
else:
if args.verbose:
print(f"Line {line_number},{position}: Use of variable {match.group(2)}")
if match.group(2) not in defined_variables:
raise Exception(
f"Error: Variable {match.group(2)} is used before being defined"
)
position = match.end(2)
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