GitLab

MB_PYTHON_VERSION is the standard variable to set the Python version.
Switch to that.  Ensure it is always set for tests.

See: https://github.com/matthew-brett/multibuild/pull/274#issuecomment-547314285

Thanks Matti.

Set defaults for PLAT where needed

Skip build tests if no docker available.

(There is no docker available for precise, so skip the builds for
precise).

Specify platform with env var, test 32 and 64 bit builds.

* [tst:multibuild] run library_builders in manylinux

* [tst:multibuild] fix

* [tst:multibuild] source linux steps

* [travis] require sudo on linux

* [tst:multlibuild] touch config

* [travis] drop sudo for precise

* [tst:multibuld] cleanup

* [tst:multibuild] check for docker

* [tst:multibuild] fix docker check

* [tst:multibuild] drop docker

* [tst:multibuild] fix command

Add tests for fill of pypy versions, give full versions for latest.

Functions renamed to match their intent better.

The syntax is similar to how TravisCI does it.

Travis test uses `get_macpython_enviroment` for CPython and
`get_python_enviroment` for PyPy.

Aliased PYTHON_VERSION to MB_PYTHON_VERSION.

Changed the test command to use get_python_enviroment instead of
get_macpython_enviroment.

Extended TravisCI matrix to cover PyPy.
The tests can now tell the implementation of PyPy apart from the CPython
version they emulate.

pip will copy the directory it installs from before running the install
/ wheel build.  If the directory is a submodule, then the copy breaks
the connection with the containing project, so git commands to get the
version will fail.

Fix is to re-create the .git directory for submodules.

Version of fix in https://github.com/matthew-brett/multibuild/pull/12
with thanks to Hassan Kibirige.