GitLab

Fixes a problem where /dev/null doesn't exist on mingw.

os.spawnv is broken on non-cygwin Windows (looks like it goes via a shell).

The user001 test in the unix package can fail when stdin comes from a
file.

Fixes some framework failures.

When working on a new foo extension, you can now put your tests in the
testsuite, set ProjectTags=-foo in mk/build.mk and skip_unless_tag('foo')
in the tests.

This means we can put package-specific tests in the repository for the
package, rather than putting them in the testsuite.  There should be a
.T file to go with the tests, in the same way as for other tests in
the testsuite (but this could be in addition to a standalone test
driver that works with Cabal's 'setup test').

Fixes the testsuite on Cygwin/MSYS using Cygwin Python.  I hope it
hasn't broken it using the native Python... if it has, we'll need to
revisit.  I can't see a good reason for the quotes, anyway.

This patch is based on a similar one "Enable timeout in Windows
and don't require cygwin python" by Esa Ilari Vuokko. It seems
like timeout is always built on Windows so I rearranged the logic
there to make the code clearer, Esa's patch required the user to
uncomment the MinGW-specific logic in order for it to work; this
patch does not have the MinGW-specific logic commented out.

I tested this on the trunk in Ubuntu 6.06 on i686 (VMWare).
I tested this on the trunk and ghc-6.6 branch on Windows i686.

As well as being generally a good idea, os.access('foo') seems to return
true if foo.exe exists on Windows.