sparse: clean up config signature code
Before, 0 was being used as the default signature value and we cast
the int to a string. We also handled I/O exceptions manually.
The new code uses cfs.tryread() so we always feed data into the
hasher. The empty string does hash and and should be suitable
for input into a cache key.
The changes made the code simple enough that the separate checksum
function could be inlined.
from __future__ import absolute_import, print_function
import os
import sys
import unittest
def main(modulename):
'''run the tests found in module, printing nothing when all tests pass'''
module = sys.modules[modulename]
suite = unittest.defaultTestLoader.loadTestsFromModule(module)
results = unittest.TestResult()
suite.run(results)
if results.errors or results.failures:
for tc, exc in results.errors:
print('ERROR:', tc)
print()
sys.stdout.write(exc)
for tc, exc in results.failures:
print('FAIL:', tc)
print()
sys.stdout.write(exc)
sys.exit(1)
if os.environ.get('SILENT_BE_NOISY'):
main = unittest.main