tests/sitecustomize.py

filemerge: split internal merge into api entry point and internal helper

This is a step toward adding 'union merge' to the internal merge tool.

'union merge' is a merge strategy which adds both left and right hand side
of a conflict region.  Git implements this merge strategy which is very
practical to have for merging to e.g. the Changelog file.

import os

if os.environ.get('COVERAGE_PROCESS_START'):
    try:
        import coverage
        import random

        # uuid is better, but not available in Python 2.4.
        covpath = os.path.join(os.environ['COVERAGE_DIR'],
                               'cov.%s' % random.randrange(0, 1000000000000))
        cov = coverage.coverage(data_file=covpath, auto_data=True)
        cov._warn_no_data = False
        cov._warn_unimported_source = False
        cov.start()
    except ImportError:
        pass