view tests/filtertraceback.py @ 42009:8f427f7c1f71

fix: make the order of the work queue deterministic

This makes any output generated during the parallel phase of execution stable
if parallelism is disabled. This helps write tests like that in the future.

Differential Revision: https://phab.mercurial-scm.org/D6166

#!/usr/bin/env python

# Filters traceback lines from stdin.

from __future__ import absolute_import, print_function

import sys

state = 'none'

for line in sys.stdin:
    if state == 'none':
        if line.startswith('Traceback '):
            state = 'tb'

    elif state == 'tb':
        if line.startswith('  File '):
            state = 'file'
            continue

        elif not line.startswith(' '):
            state = 'none'

    elif state == 'file':
        # Ignore lines after "  File "
        state = 'tb'
        continue

    print(line, end='')