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55 lines
1.7 KiB
55 lines
1.7 KiB
9 months ago
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import contextlib
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import os
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from six.moves.urllib.error import URLError
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from six.moves.urllib.request import urlopen
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from leapp.exceptions import StopActorExecutionError
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from leapp.libraries.stdlib import CalledProcessError
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@contextlib.contextmanager
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def guarded_execution(*guards):
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try:
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yield
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except CalledProcessError as e:
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# collect output from guards for possible spurious failure
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guard_errors = []
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for guard in guards:
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err = guard()
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if err:
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guard_errors.append(err)
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details = None
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if guard_errors:
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details = {
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'hint': 'Possible spurious failure: {cause}'.format(cause=' '.join(guard_errors))
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}
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raise StopActorExecutionError(
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message=str(e),
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details=details
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)
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def connection_guard(url='https://example.com'):
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def closure():
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try:
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urlopen(url)
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return None
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except URLError as e:
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cause = '''Failed to open url '{url}' with error: {error}'''.format(url=url, error=e)
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return ('There was probably a problem with internet connection ({cause}).'
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' Check your connection and try again.'.format(cause=cause))
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return closure
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def space_guard(path='/', min_free_mb=100):
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def closure():
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info = os.statvfs(path)
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free_mb = (info.f_bavail * info.f_frsize) >> 20
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if free_mb >= min_free_mb:
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return None
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return ('''Not enough free disk space in '{path}', needed: {min} M, available: {avail} M.'''
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' Free more disk space and try again.'.format(path=path, min=min_free_mb, avail=free_mb))
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return closure
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