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#!/usr/bin/env python
# Reduce msbuild output by folding unimportant messages.
#
# Copyright (C) 2019 Peter Wu <peter@lekensteyn.nl>
# SPDX-License-Identifier: GPL-2.0-or-later
import subprocess
import sys
def print_lines(f):
# If an important message is present, print it with a newline.
# Otherwise skip the newline but print the next line with a carriage return.
# If the end of build is reached, just print the trailing messages (includes
# elapsed time, warning/error counts, etc.).
start_of_line = ''
end_of_build = False
for line in iter(f.readline, ''):
line = line.rstrip('\r\n')
if line.startswith('Build succeeded.'):
end_of_build = True
is_important = end_of_build or any([
': error ' in line,
': warning ' in line,
'-- FAILED.' in line,
])
if is_important:
eol = '\n'
if start_of_line == '\r':
start_of_line = '\n'
else:
eol = ''
sys.stdout.write("%s%s%s" % (start_of_line, line, eol))
sys.stdout.flush()
if is_important:
start_of_line = ''
else:
start_of_line = '\r'
# If the last line was not important, its LF was omitted so print it.
if not is_important:
sys.stdout.write('\n')
command = sys.argv[1:]
if command:
# Execute the given command and parse its output.
proc = subprocess.Popen(command,
bufsize=1,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
universal_newlines=True
)
try:
print_lines(proc.stdout)
finally:
sys.exit(proc.wait())
else:
# Assume a file read from stdin.
print_lines(sys.stdin)
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