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#!/usr/bin/env python
# ===----------------------------------------------------------------------===##
#
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
# See https://llvm.org/LICENSE.txt for license information.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#
# ===----------------------------------------------------------------------===##
"""
sym_diff - Compare two symbol lists and output the differences.
"""
from argparse import ArgumentParser
import sys
from libcxx.sym_check import diff, util
def main():
parser = ArgumentParser(
description="Extract a list of symbols from a shared library."
)
parser.add_argument(
"--names-only",
dest="names_only",
help="Only print symbol names",
action="store_true",
default=False,
)
parser.add_argument(
"--removed-only",
dest="removed_only",
help="Only print removed symbols",
action="store_true",
default=False,
)
parser.add_argument(
"--only-stdlib-symbols",
dest="only_stdlib",
help="Filter all symbols not related to the stdlib",
action="store_true",
default=False,
)
parser.add_argument(
"--strict",
dest="strict",
help="Exit with a non-zero status if any symbols " "differ",
action="store_true",
default=False,
)
parser.add_argument(
"-o",
"--output",
dest="output",
help="The output file. stdout is used if not given",
type=str,
action="store",
default=None,
)
parser.add_argument(
"--demangle", dest="demangle", action="store_true", default=False
)
parser.add_argument(
"old_syms",
metavar="old-syms",
type=str,
help="The file containing the old symbol list or a library",
)
parser.add_argument(
"new_syms",
metavar="new-syms",
type=str,
help="The file containing the new symbol list or a library",
)
args = parser.parse_args()
old_syms_list = util.extract_or_load(args.old_syms)
new_syms_list = util.extract_or_load(args.new_syms)
if args.only_stdlib:
old_syms_list, _ = util.filter_stdlib_symbols(old_syms_list)
new_syms_list, _ = util.filter_stdlib_symbols(new_syms_list)
added, removed, changed = diff.diff(old_syms_list, new_syms_list)
if args.removed_only:
added = {}
report, is_break, is_different = diff.report_diff(
added, removed, changed, names_only=args.names_only, demangle=args.demangle
)
if args.output is None:
print(report)
else:
with open(args.output, "w") as f:
f.write(report + "\n")
exit_code = 1 if is_break or (args.strict and is_different) else 0
sys.exit(exit_code)
if __name__ == "__main__":
main()
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