__init__.py

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import os

def ROOT6WorkAroundEnabled(id=None):
    '''
    Helper function to easily exclude ROOT6 work-arounds for testing.

    >>> os.environ['ROOT6_WORK_AROUND'] = 'all'
    >>> ROOT6WorkAroundEnabled()
    True
    >>> os.environ['ROOT6_WORK_AROUND'] = 'none'
    >>> ROOT6WorkAroundEnabled('JIRA-XYZ')
    False
    >>> os.environ['ROOT6_WORK_AROUND'] = 'JIRA-X'
    >>> ROOT6WorkAroundEnabled('JIRA-X')
    True
    >>> ROOT6WorkAroundEnabled('JIRA-Y')
    True
    >>> os.environ['ROOT6_WORK_AROUND'] = 'JIRA-X,-JIRA-Y'
    >>> ROOT6WorkAroundEnabled('JIRA-X')
    True
    >>> ROOT6WorkAroundEnabled('JIRA-Y')
    False
    >>> os.environ['ROOT6_WORK_AROUND'] = '-JIRA-Y'
    >>> ROOT6WorkAroundEnabled('JIRA-X')
    True
    >>> ROOT6WorkAroundEnabled('JIRA-Y')
    False
    '''
    enabled = os.environ.get('ROOT6_WORK_AROUND', 'all').lower()
    if enabled == 'all':
        return True
    if enabled in ('none', 'no', 'off', 'false', '0'):
        return False
    if id is None: # unnamed work-arounds can only be disabled globally
        return True
    enabled = set(map(str.strip, enabled.split(',')))
    disabled = set([ e[1:] for e in enabled if e.startswith('-') ])
    id = id.lower()
    # the w-a is enabled if in the enabled list or not explicitly disabled
    return id in enabled or id not in disabled