changelog-delay: move the delay/divert logic inside the (inner) revlog
Instead of hacking throught the vfs/opener, we implement the delay/divert logic
inside the `_InnerRevlog` and `randomaccessfile` object. This will allow to an
alternative implementation of the `_InnerRevlog` that does not need to use Python details.
As a result, the new implementation can use the transaction less agressively
and avoid some extra output since no data had been written yet. That seems like
a good side effect.
import os
if os.environ.get('COVERAGE_PROCESS_START'):
try:
import coverage
import uuid
covpath = os.path.join(
os.environ['COVERAGE_DIR'], 'cov.%s' % uuid.uuid1()
)
cov = coverage.coverage(data_file=covpath, auto_data=True)
cov._warn_no_data = False
cov._warn_unimported_source = False
cov.start()
except ImportError:
pass