ctest-driver.md

CTest suffers from at least two issues, in particular with regard to its PASS_REGULAR_EXPRESSION feature:

1. The regular expression syntax used by CMake is deficient.
2. The exit code of a test is ignored if one of the regexes matches.

ctest-driver.py tries to fix them.

$ python3 path/to/tools/ctest-driver.py run --pass-regex OK --fail-regex Fail -- path/to/executable arg1 arg2

In addition, it's a cross-platform grep:

$ python3 path/to/tools/ctest-driver.py grep --pass-regex OK --fail-regex Fail -- path/to/logfile.log