# Copyright 2016 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.


import os
import re
import subprocess
import sys

# This script executes libool and filters out logspam lines like:
#    '/path/to/libtool: file: foo.o has no symbols'

SUPPRESSED_PATTERNS = [
    re.compile(v)
    for v in [
        r'^.*libtool: (?:for architecture: \S* )?file: .* has no symbols$',
        # Xcode 11 spelling of the "empty archive" warning.
        # TODO(thakis): Remove once we require Xcode 12.
        r'^.*libtool: warning for library: .* the table of contents is empty '
        r'\(no object file members in the library define global symbols\)$',
        # Xcode 12 spelling of the "empty archive" warning.
        r'^warning: .*libtool: archive library: .* '
        r'the table of contents is empty ',
        r'\(no object file members in the library define global symbols\)$',
        r'^.*libtool: warning same member name \(\S*\) in output file used '
        r'for input files: \S* and: \S* \(due to use of basename, '
        r'truncation, blank padding or duplicate input files\)$',
    ]
]


def ShouldSuppressLine(line):
    """Returns whether the line should be filtered out."""
    for pattern in SUPPRESSED_PATTERNS:
        if pattern.match(line):
            return True
    return False


def Main(cmd_list):
    env = os.environ.copy()
    libtoolout = subprocess.Popen(cmd_list, stderr=subprocess.PIPE, env=env)
    _, err = libtoolout.communicate()
    for line in err.decode('UTF-8').splitlines():
        if not ShouldSuppressLine(line):
            print(line, file=sys.stderr)
    return libtoolout.returncode


if __name__ == '__main__':
    sys.exit(Main(sys.argv[1:]))