[PATCH v3 1/5] cmake: make it easier to diagnose regressions in CTest runs

From: Johannes Schindelin <johannes.schindelin@gmx.de>

When a test script fails in Git's test suite, the usual course of action is to re-run it using options to increase the verbosity of the output, e.g. `-v` and `-x`.

Like in Git's CI runs, when running the tests in Visual Studio via the CTest route, it is cumbersome or at least requires a very unintuitive approach to pass options to the test scripts: the CMakeLists.txt file would have to be modified, passing the desired options to _all_ test scripts, and then the CMake Cache would have to be reconfigured before running the test in question individually. Unintuitive at best, and opposite to the niceties IDE users expect.

So let's just pass those options by default: This will not clutter any output window but the log that is written to a log file will have information necessary to figure out test failures.

While at it, also imitate what the Windows jobs in Git's CI runs do to accelerate running the test scripts: pass the `--no-bin-wrappers` and `--no-chain-lint` options.

This makes the test runs noticeably faster because the `bin-wrappers/` scripts as well as the `chain-lint` code make heavy use of POSIX shell scripting, which is really, really slow on Windows due to the need to emulate POSIX behavior via the MSYS2 runtime. In a test by Eric Sunshine, it added two minutes (!) just to perform the chain-lint task.

The idea of adding a CMake config option (á la `GIT_TEST_OPTS`) was considered during the development of this patch, but then dropped: such a setting is global, across _all_ tests, where e.g. `--run=...` would not make sense. Users wishing to override these new defaults are better advised running the test script manually, in a Git Bash, with full control over the command line.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
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 contrib/buildsystems/CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)